RRB JE Mechanical-Machining Questionbank 2

Mechanical-Engineering

In a parting-off operation, how is the cutting tool fed into the workpiece? RRB JE (Re-Exam) 04.06.2025

• By rotating the cross-slide screw by hand
• By rotating the headstock spindle directly
• By adjusting the tailstock manually
• By moving the carriage along the lathe bed

Explanation:

• In a parting-off operation, the cutting tool is fed radially into the workpiece by rotating the cross-slide screw, which moves the tool post perpendicular to the lathe axis.

Parallel shank type and morse taper shank type drills belong to ____ type of drills. RRB JE (Re-Exam) 04.06.2025

• straight-fluted
• twist
• hexagonal
• flat

Explanation:

• Parallel shank type and morse taper shank type drills belong to twist drills. Parallel shank drills are held in drill chucks, while taper shank drills with Morse taper are held in sleeves or sockets.

When is the lead screw engaged in a lathe? RRB JE (Re-Exam) 04.06.2025

• Only for turning and facing operations
• Only during thread-cutting operations
• Continuously for all machining processes
• During both knurling and continuous feed motion

Explanation:

• The lead screw is engaged only during thread-cutting operations. Turning, facing, and knurling do not require the lead screw.

A bench mounted drilling machine is of the same type as a —-? RRB JE Stage 2 (22.04.2025 9:00 AM-11:00 AM)

• gang drilling machine
• deep hole drilling machine
• sensitive drilling machine
• radial drilling machine

Explanation:

• A bench mounted drilling machine is the same type as a sensitive drilling machine, capable of drilling holes up to 12.5 mm diameter for light duty work.

In drilling operations, a coolant is used to —-? RRB JE Stage 2 (22.04.2025 9:00 AM-11:00 AM)

• heat the drill bit
• cool down the drill bit
• reduce durability of drill bit
• clean the drill bit

Explanation:

• Coolant reduces heat generated by friction, prevents overheating, extends tool life, improves hole quality, and reduces wear on the drill bit.

Which of the following is a limitation of taper turning by swiveling the compound rest? RRB JE Stage 2 (22.04.2025 2:30-4:30 PM)

• It is suitable only for short tapers
• It provides high production efficiency
• It cannot turn any type of taper
• It ensures the best surface finish

Explanation:

• Limitation of taper turning by swiveling compound rest: suitable only for short tapers due to compound rest travel constraints, not suitable for high production, and surface finish may not be optimal.

Drill chuck is the major part of drilling machines, which —-? RRB JE Stage 2 (22.04.2025 2:30-4:30 PM)

• holds electric motor, V-pulleys and V-belt
• transmits rotary motion to the drill spindle at a number of speeds
• holds the drill bit
• rests on the base and supports the head and the table

Explanation:

• Drill chuck holds the drill bit securely in place during drilling operation, ensuring stability and alignment for precise drilling.

In which of the following operations is a single point tool head fed linearly to the end of the work piece? RRB JE 30-08-2019

• Taper turning
• Parting
• Facing
• Boring

Explanation:

• Boring is the process of enlarging a hole using a single point cutting tool fed linearly to the end of the workpiece.

A steel shaft of 25 mm diameter is turned at a cutting speed of 50 meters per minute. Find the r.p.m. of the shaft. RRB JE 30-08-2019

• 222.5
• 35
• 700
• 637

Explanation:

• v = πDN, 50 = π × 0.025 × N, N = 50/(π × 0.025) = 636.62 ≈ 637 rpm.

Taper on a cylindrical surface of a job can be produced in a lathe by which of the following methods? RRB JE 30-08-2019

• All of the options
• By combination feed
• By swiveling the compound rest
• By off-setting the tail stock

Explanation:

• Taper turning methods include: combination feed, swiveling compound rest, off-setting tail stock, and form tool.

The operation of smoothing and squaring the surface around a hole is known as —-? RRB JE 30-08-2019

• Counter sinking
• Spot facing
• Counter boring
• Trepanning

Explanation:

• Spot facing is smoothing and squaring the surface around a hole to provide a smooth seat for a nut or cap screw head, generally done on castings and forgings.

A 125 mm diameter cutter has 10 teeth. It operates at a cutting speed of 14 m/min with a table traverse 100 mm/min. The feed per tooth of the cutter is —-? RRB JE 30-08-2019

• 2.86 mm
• 0.8 mm
• 0.286 mm
• 10 mm

Explanation:

• N = (14 × 1000)/(π × 125), Feed/tooth = Feed per min/(T × N) = (100 × π × 125)/(10 × 14 × 1000) ≈ 0.286 mm.

In which of the following operation of lathe machine is the tool NOT fed in a straight path? RRB JE 31-08-2019

• Form turning
• Contour turning
• Facing
• Taper turning

Explanation:

• In contour turning operation, the tool is not fed in a straight path.

In which of the following operations is a single point tool head fed linearly to the end of the workpiece? RRB-JE 30.08.2019, Ist Shift

• Taper turning
• Parting
• Facing
• Boring

Explanation:

• In boring operations, a single point tool head is fed linearly to the end of the workpiece. Boring enlarges a hole that has already been drilled.

Taper on a cylindrical surface of a job can be produced in a lathe by which of the following methods? RRB-JE 30.08.2019, Ist Shift

• All of the options
• By combination feed
• By swiveling the compound rest
• By off-setting the tail stock

Explanation:

• A taper is defined as uniform increase or decrease in diameter. Methods: swiveling compound rest, offsetting tail stock, combination of feed, and taper turning attachment.

The operation of smoothing and squaring the surface around a hole is known as —-? RRB-JE 30.08.2019, Ist Shift

• Counter sinking
• Spot facing
• Counter boring
• Trepanning

Explanation:

• Spot facing is machining operation for producing a flat seat for bolt head, washer or nut at the opening of drilled hole.

____ is the process of making flat surfaces on a lathe. RRB-JE 29.08.2019, Ist Shift

• Facing
• Reaming
• Drilling
• Boring

Explanation:

• Facing is making flat surfaces on a lathe by feeding the tool at right angles to the axis of the work.

The largest diameter of work that can be carried between the centers of a lathe is known as —-? RRB-JE 29.08.2019, Ist Shift

• Saddle
• Swing
• Socket
• Spindle

Explanation:

• Swing is the largest diameter of work that can be carried between the centers of a lathe. Swing over bed indicates maximum diameter over bed ways.

In turning operation, the feed could be doubled to increase the metal removal rate. To keep the same level of surface finish, the nose radius of the tool should be —-? (RRB Mumbai SSE 05.10.2008)

• Halved
• Kept unchanged
• Doubled
• Made four times

Explanation:

• h = f²/(8R). If feed is doubled, f₁²/R₁ = (2f₁)²/R₂, R₂ = 4R₁. Nose radius should be quadrupled.

During the machining operation —-? (RRB Mumbai JE 19.12.2010)

• the chips experience stresses
• the chips experience strains
• the values of stresses and strains are always calculated for the conditions at the normal plane
• the chips experience stresses and strains

Explanation:

• During machining, chips experience both stress and strain because material undergoes plastic deformation in the shear zone.

The operation of bevelling the extreme end of a workpiece is called —-? (RRB Mumbai SSE 19.12.2010)

• Eccentric turning
• Thread cutting
• Chamfering
• Knurling

Explanation:

• Chamfering is bevelling the extreme end of a workpiece, generally at 45° angle, essential after thread cutting to avoid injuries.

In a single point turning operation with a cemented carbide and steel combination having Taylor exponent 0.25, if the cutting speed is halved, the tool life will be —-? (RRB Kolkata Diesel JE 25.10.2009)

• Half
• 2 times
• 8 times
• 16 times

Explanation:

• V₁T₁^0.25 = (V₁/2)T₂^0.25, (T₂/T₁)^0.25 = 2, T₂/T₁ = 16.

In a lathe operation, centre drilling should be done at —-? (RRB Chandigarh SSE 25.10.2009)

• higher rpm with a higher feed
• higher rpm with a slower feed
• slower rpm with a higher feed
• slower rpm with a slower feed

Explanation:

• Centre drilling should be done at higher rpm with slower feed.

For producing both internal and external screw threads, the method used is —-? (RRB Mumbai C&G JE 25.10.2009)

• Thread chasing with multiple-rib chasers
• Thread milling with multiple-thread cutters
• Thread tapping with taps
• Die threading with self-opening die heads

Explanation:

• Thread milling is used for cutting screw threads with single form or multiple form milling cutters for both internal and external threads.

Facing is the operation of —-? (RRB Bhubneshwar JE-II 19.12.2010)

• Beveling the extreme end of a work piece
• Reducing the diameter of a work piece over a very narrow surface
• Machining the ends of a work piece to produce a flat surface square with the axis
• Embossing a diamond shaped pattern on the surface of a work piece

Explanation:

• Facing is machining the ends of a workpiece to produce a flat surface square with the axis.

In grooving operation is done —-? (RRB Chandigarh SSE 09.09.2012)

• Embossing a diamond shaped pattern on the surface of a workpiece
• Beveling the extreme end of a workpiece
• Reducing the diameter of a workpiece over a very narrow surface
• Enlarging the end of a hole cylindrically

Explanation:

• Grooving is reducing diameter over a very narrow surface. Types include external grooving and face grooving.

The production of a conical surface by gradual reduction in diameter is known as —-? (RRB SSE (Shift-III), 01.09.2015)

• Taper turning
• Knurling
• Threading
• Boring

Explanation:

• Taper turning produces a conical surface by gradual reduction in diameter.

The reason for a company to strongly favour buying a component even if they could make it themselves is that the —-? RRB JE (Re-Exam) 04.06.2025

• company has excess manufacturing capacity
• vendor offers a lower cost and higher quality
• company wants to maintain design secrecy
• company wants to improve its quality control

Explanation:

• Companies favour buying when vendors offer lower cost and higher quality, reducing expenses and improving end product.

The size of a shaper is given by —-? RRB JE (Re-Exam) 04.06.2025

• Mass of machine
• Rate size
• Motor power
• Stroke length

Explanation:

• Shaper size is given by stroke length. Shaper is a reciprocating machine tool used for producing small flat surfaces with single point tool.

The size of a shaper is given by —-? RRB-JE 30.08.2019, Ist Shift

• Mass of machine
• Rate size
• Motor power
• Stroke length

Explanation:

• Size of shaper is specified by length of stroke. Material removal occurs only in forward stroke.

Quick return mechanism is used in a —-? (RRB Gorakhpur Design SSE 09.09.2012)

• Milling machine
• Broaching machine
• Grinding machine
• Shaping machine

Explanation:

• Quick return mechanism converts rotary motion to reciprocating motion, moving ram slower during forward cutting stroke and faster during return stroke.

In case of slotting machine, cutting action takes place in —-? (RRB Bangalore SSE 09.09.2012)

• downward stroke
• backward stroke
• upward stroke
• forward stroke

Explanation:

• In slotting machine, cutting action takes place in downward stroke with vertical reciprocating motion.

In a shaper machine, the mechanism for tool feed is —-? (RRB Bhopal TM SSE 25.10.2009)

• Geneva mechanism
• Whitworth mechanism
• Ratchet and Pawl mechanism
• Ward-Leonard system

Explanation:

• Whitworth quick return mechanism is used for tool feed in shaper machine. It converts rotary motion to reciprocating motion.

Quick return motion mechanism is typically used in which of the following machine? (RRB Mumbai C&G SSE 25.10.2009)

• Open die forge
• Hydraulic press
• Shaper
• Lathe

Explanation:

• Quick return motion mechanism is typically used in shaper for conversion of rotary motion into reciprocating motion.

Calculate overall average speed of operation when stroke of a shaper is 250 mm. It makes 30 double strokes per minute. (DMRC 18.02.2017, 8.30 a.m)

• 3.75 m/min
• 7.5 m/min
• 15 m/min
• 5 m/min

Explanation:

• N = V₀/(2l), 30 = V₀/(2 × 0.25), V₀ = 15 m/min.

Which of the following is the motion of tool in shaping process? (RRB Malda SSE 25.10.2009)

• Reciprocating
• Rotating
• Oscillatory
• Stationary

Explanation:

• Tool motion in shaping process is reciprocating. The shaper holds single point cutting tool in ram and workpiece is fixed.

Which of the following machines does not require quick return mechanism? (RRB Gorakhpur RDSO SSE 25.10.2009)

• Slotter
• Planer
• Shaper
• Broaching

Explanation:

• Quick return mechanism is not used in broaching. Shaper, planer, and slotter use it for faster return stroke.

A standard or double housing planer of size 750 mm × 350 mm × 2.5 mm means that a planer can machine a work of —-? DMRC JE 17.04.2018, 4:30-6:45pm

• width 750, height 350 and length 2.5
• height 750, length 350 and width 2.5
• length 750, width 350 and height 2.5
• height 750, width 350 and length 2.5

Explanation:

• Planer size 750 mm × 350 mm × 2.5 mm means width 750 mm, height 350 mm, and length 2.5 m.

The planer machine in which three surfaces can be machined at a time is —-? (RRB Chandigarh SSE 25.10.2009)

• Open housing planer
• Double housing planer
• Pit planer
• Edge or plate planer

Explanation:

• Double housing planer can machine three surfaces at a time. It has a long heavy base on which a table reciprocates.

Size of shaper specified by —-? (Konkan Railway SSE 2015)

• length of stroke
• size of table
• size of bed
• power of motor

Explanation:

• Size of shaper is specified by maximum length of stroke or cut it makes.

Tool of shaper is —-? (Konkan Railway STA 2017) (RRB Allahabad SSE 19.12.2010)

• Single point cutting tool
• Quadruple point cutting tool
• Double point cutting tool
• Multi point cutting tool

Explanation:

• Tool of shaper is single point cutting tool.

In a Shaper, the metal is removed during —-? (DMRC JE 20.04.2018) (RRB Mumbai SSE 19.12.2010)

• Forward stroke
• Both the forward and return strokes
• Return stroke
• Neither the forward nor the return stroke

Explanation:

• In shaper, metal is removed during forward stroke. Quick return mechanism makes return stroke faster.

The cutting speed of the tool in a mechanical shaper is —-? (RRB Mumbai SSE 05.10.2008)

• maximum at the beginning of the cutting stroke
• maximum at the end of the cutting stroke
• maximum at the middle of the cutting stroke
• minimum at the middle of the cutting stroke

Explanation:

• Cutting speed of tool in shaper is maximum at the middle of cutting stroke.

In machine tools, chatter is due to —-? (RRB Allahabad JE 19.12.2010) RRB Chennai Technical (Eng.), 15.04.2007

• Free vibrations
• Random vibrations
• Forced vibrations
• Self-excited vibration

Explanation:

• Chatter is due to self-excited vibrations from dynamic interaction between workpiece and machine tool.

The usual ratio of forward and return stroke in shaper is —-? (RRB Bhubneshwar JE-11 19.12.2010)

• 2:1
• 1:2
• 2:3
• 3:2

Explanation:

• Usual ratio of forward and return stroke in shaper is 3:2.

In case of shaper, for finish machining, the practice is to use —-? (JMRC JE 10.06.2017)

• maximum feeds at high speeds
• maximum feeds at slow speeds
• minimum feeds at slow speeds
• minimum feeds at high speeds

Explanation:

• For finish machining in shaper, higher speeds and minimum feeds are used.

While using High Speed Steel tools on lathe, the speed of chuck will be lowest while machining —-? (BMRCL JE 24 Feb. 2019)

• Aluminium
• Brass
• Cast Iron
• Copper

Explanation:

• Speed of chuck is lowest while machining cast iron because it is brittle. Cutting speed: Minimum = Cast Iron, Maximum = Aluminium.

When turning Mild Steel, if the area of cross-section of the cut remain constant, the cutting force will be minimum if depth of cut is —-? (RRB Allahabad SSE 19.12.2010)

• one-and-a-half time the feed per revolution
• two times the feed per revolution
• half the feed per revolution
• approximately equal to the feed per revolution

Explanation:

• Cutting force is minimum if depth of cut is approximately equal to feed per revolution.

In case of a planer —-? (RRB Mumbai SSE 05.10.2008)

• Work is stationary and tool reciprocates
• Work reciprocates and tool is stationary
• Work and tool both reciprocate
• None of the above

Explanation:

• In planer, work reciprocates and tool is stationary. In shaper, work is stationary and tool reciprocates.

In a shaper machine, the cutting operation is performed during —-? (RRB Mumbai SSE 19.12.2016)

• Forward stroke of a tool
• Return stroke of a tool
• Both forward and return stroke of a tool
• None of the above

Explanation:

• Shaper performs cutting operation during forward stroke of the tool.

The machine on which the job reciprocates and the tool remains stationary is known as —-? (RRB SSE Secundrabad (Shift-1), 01.09.2015)

• Planer
• Shaper
• Drilling
• Milling

Explanation:

• In planer, job reciprocates and tool remains stationary. In shaper, tool reciprocates and job is stationary.

Which of the following is an example of orthogonal cutting? (RRB JE (Shift-1), 26.08.2015)

• Shaping
• Turning
• Drilling
• Milling

Explanation:

• Orthogonal cutting examples: Shaping, Lathe cut-off operation. Oblique cutting examples: Drilling, Milling, Turning.

Name the part of a milling machine on which milling cutters are securely mounted and rotated. RRB JE (Re-Exam) 04.06.2025

• Arbor
• Front brace
• Overhanging arm
• Saddle

Explanation:

• Arbor is the part on which milling cutters are securely mounted and rotated. One end attaches to column, other is supported by overarm.

Identify the milling cutter used for parting-off operations or cutting thin slots. RRB JE Stage 2 (22.04.2025 9:00 AM-11:00 AM)

• Plain milling cutter
• Fly milling cutter
• Metal slitting cutter
• Angle milling cutter

Explanation:

• Metal slitting cutter is used for parting-off operations or slotting with narrow width.

In rack and pinion gear, the rack is a ____ and the pinion is a ____. RRB JE Stage 2 (22.04.2025 2:30-4:30 PM)

• circular wheel; straight line gear
• straight line gear; straight line gear
• circular wheel; circular wheel
• straight line gear; circular wheel

Explanation:

• Rack is a straight line gear and pinion is a circular wheel. This system converts rotational motion into linear motion.

In climb milling, metal is removed by the cutter rotating in the —-? RRB JE Stage 2 (22.04.2025 2:30-4:30 PM)

• diagonal direction of the feed of the workpiece
• same direction of the feed of the workpiece
• opposite direction of the feed of the workpiece
• perpendicular direction of the feed of the workpiece

Explanation:

• In climb milling, cutter rotates in the same direction as feed. In up milling, cutter rotates against direction of feed.

Up milling is also called as —-? RRB JE 31-08-2019

• Face milling
• Conventional milling
• Climb milling
• End milling

Explanation:

• Up milling is also called conventional milling. Chip thickness is minimum at beginning and maximum at end.

Which of the following operations does NOT use a Multiple-point cutting tool? RRB JE 31-08-2019

• Milling
• Drilling
• Turning
• Broaching

Explanation:

• Turning uses a single point cutting tool. Milling, drilling, and broaching use multipoint cutting tools.

The height by which a tooth of a gear projects beyond the standard pitch or pitch line is technically known as —-? RRB JE 31-08-2019

• Dedendum
• Addendum
• Pitch radius
• Backlash

Explanation:

• Addendum is the height by which tooth projects beyond pitch line, equal to module. Dedendum = 1.57m.

A Meander drive is a ____ shaft mechanism. RRB JE 31-08-2019

• Four
• One
• Two
• Three

Explanation:

• Meander drive is a 3-shaft mechanism used for feed mechanism in feed gear boxes.

Up milling is also called as —-? RRB JE CBT-II 31.08.2019 IInd Shift

• Face milling
• Conventional milling
• Climb milling
• End milling

Explanation:

• Up milling is also known as conventional milling. Cutter rotates against direction of work feed. Surface finish is poor and more power is consumed.

What type of jigs is used for accurate space holes around a circular part? (RRB Gorakhpur RDSO SSE 25.10.2009)

• Plate
• Template
• Drill
• Indexing

Explanation:

• Indexing jigs are used for accurate spaced holes around a circular part.

Which one of the following machines is superior to other machines in terms of accuracy and surface finish? (RRB Malda SSE 25.10.2009)

• Slotting Machine
• Milling Machine
• Lathe Machine
• Shaping Machine

Explanation:

• Milling machine is superior in terms of accuracy and surface finish. Special purpose machines are superior to general purpose machines for specific work.

What is the process of removing metal by a milling cutter which is rotated against the direction of travel of workpiece? (RRB Mumbai C&G SSE 25.10.2009) DDA JE 26.04.2018 9-11AM (Vizag steel (J.T.), 09.07.2017)

• End milling
• Down milling
• Face milling
• Up milling

Explanation:

• Up milling is process of removing metal by cutter rotated against direction of travel of workpiece. Also called conventional milling.

A straight teeth slab milling cutter of 100 mm diameter and 10 teeth rotating at 200 rpm is used to remove a layer of 3 mm thickness from a steel bar. If the table feed is 400 mm/minute, the feed per tooth in this operation will be —-? (RRB Bhopal TM SSE 25.10.2009)

• 0.2 mm
• 0.4 mm
• 0.5 mm
• 0.6 mm

Explanation:

• Feed per tooth = Table feed/(No. of teeth × rpm) = 400/(10 × 200) = 0.2 mm/tooth.

Workpiece holding device in milling and grinding operation is called —-? (RRB Kolkata SSE 09.09.2012)

• Holder
• Jig
• Template
• Fixture

Explanation:

• Fixture holds, locates, and supports workpiece securely. It does not guide the tool.

The basic tooling bit on a milling machine is called as the —-? (RRB Bhopal SSE 09.09.2012)

• Cutter
• Arbor
• Work holding device
• Cutting tool

Explanation:

• The basic tooling bit on a milling machine is called the cutter.

A milling cutter having 8 teeth is rotating 200 rpm. If the feed per tooth is 0.1 mm, then what is its speed? (RRB Jammu SSE 09.09.2012)

• 70 mm per minute
• 120 mm per minute
• 87 mm per minute
• 160 mm per minute

Explanation:

• Table feed = Feed/tooth × No. of teeth × rpm = 0.1 × 8 × 200 = 160 mm/min.

Which of the following gives better tool life and good surface finish? (RRB Bhubneshwar JE II 29.11.2008)

• form milling
• gang milling
• down milling
• up milling

Explanation:

• Down milling gives better tool life and good surface finish.

External threads can be produced by —-? (RRB Jammu JE 25.10.2009)

• 1 and 3 only
• 1 and 2 only
• 2 and 3 only
• 1, 2 and 3

Explanation:

• External threads can be made by rolling, milling, and grinding.

Which one of the following is not a feature of gear hobbing process? (RRB Allahabad JE 25.10.2009)

• High rate of production
• Generation of helical gear
• Very accurate tooth profile
• Generation of internal gears

Explanation:

• Gear hobbing cannot generate internal gears and bevel gears. It can generate spur, helical, worm, and worm wheels.

Swiss type screw machines have —-? (RRB Patna JE 25.10.2009)

• Turrents
• Radial slides
• Spindle carriers
• Tool posts

Explanation:

• Swiss type screw machines have radial slides for high precision parts in high volume.

Which one of the following processes of gear manufacture results in best accuracy of the involute gear tooth profile? (RRB Allahabad SSE 09.09.2012)

• Milling
• Hobbing
• Rotary gear shaper
• Rack type gear shaper

Explanation:

• Hobbing results in best accuracy of involute gear tooth profile. It is fast, continuous, and economical.

Gear hobbing produces more accurate gears than milling because in hobbing —-? (RRB Mumbai JE 19.12.2010)

• There is a continuous indexing operation
• Pressure angle is larger than in milling
• Hob and workpiece both are rotating
• A special multi-tooth cutter (hob) is used

Explanation:

• Hobbing produces more accurate gears due to continuous indexing operation.

Teeth of internal spur gears can be accurately cut in a —-? (DMRC JE 2013)

• Milling machine
• Gear shaping machine
• Slotting machine
• Hobbing machine

Explanation:

• Internal spur gears can be accurately cut in a gear shaping machine.

Helix angle for fast helix drill is normally —-? (Konkan Railway STA 2017)

• 35°
• 60°
• 90°
• 5°

Explanation:

• Fast helix drill has helix angle 35°. Usual range is 20°-45°, larger angle 45°-60° for deep holes and softer materials.

The teeth of both external and internal spur gears can be cut on —-? (Konkan Railway SSE 2015)

• Milling machine
• Gear shaping machine
• Gear hobbing machine
• Gear shaving machine

Explanation:

• Gear shaping machine can cut both external and internal spur gears.

Which of the following gear manufacturing processes is based on generation principle? (RRB Chandigarh SSE 25.10.2009)

• Gear hobbing
• Gear shaping
• Gear milling
• Gear shaving

Explanation:

• Gear hobbing is based on generation principle. It is not suitable for cutting internal gears and bevel gears.

In which of the following milling machine, the table can be tilted in a vertical plane by providing a swivel arrangement at the knee? (RRB Gorakhpur RDSO SSE 25.10.2009)

• Universal milling machine
• Plain milling machine
• Omniversal milling machine
• Hand milling machine

Explanation:

• Omniversal milling machine has knee attached to circular base for swivelling about horizontal axis parallel to spindle.

The production of flat vertical surfaces on both sides of a workpiece is called —-? (RRB Malda SSE 25.10.2009)

• Gang milling
• Straddle milling
• Form milling
• End milling

Explanation:

• Straddle milling produces flat vertical surfaces on both sides of a workpiece.

Internal and external threads can be produced on tapered surfaces conveniently by —-? (RRB Mumbai C&G SSE 25.10.2009)

• Universal milling machine
• Piano miller
• Planetary milling machine
• Lathe

Explanation:

• Internal and external threads on tapered surfaces can be produced conveniently by lathe.

Hobbing process is not suitable for cutting following type of gear —-? (Vizag steel (M.T.), 2017) (RRB JE Jharkhand 2014)

• Spur
• Helical
• Worm
• Bevel

Explanation:

• Hobbing is not suitable for cutting bevel gears and internal gears.

A milling cutter having 8 teeth is rotating at 150 RPM. If the feed per tooth is 0.1, the table speed in mm per minute is —-? (RRB Bhopal TM SSE 25.10.2009)

• 120
• 187
• 125
• 70

Explanation:

• Table feed = Feed/tooth × No. of teeth × rpm = 0.1 × 8 × 150 = 120 mm/min.

Gear hobbing process is faster than milling because —-? (RRB Bangalore SSE 09.09.2012)

• Indexing time is less
• Hob rotates faster
• Work rotates faster
• Several teeth cut at a time

Explanation:

• Gear hobbing is faster because several teeth can be cut at a time.

A universal dividing head is used to perform a milling operation by —-? (RRB Allahabad JE 09.09.2012)

• plain indexing
• direct indexing
• differential indexing
• compound indexing

Explanation:

• Universal dividing head is used for differential indexing in milling operations.

Milling machine most suitable for Tool-Room operation is —-? (RRB Bhubneshwar JE II 29.11.2008)

• Plain milling machine
• Omniversal milling machine
• Universal milling machine
• Fixed bed type milling machine

Explanation:

• Omniversal milling machine with five movements is mainly used in tool room.

A knee is part of the following —-? (JMRC JE 10.06.2017)

• Shaper
• Lathe
• Milling machine
• Slotter

Explanation:

• Knee is part of milling machine. It encloses gearing mechanism and is fastened to column by dovetail ways.

A fly cutter is used on —-? (RRB Bhubneshwar JE-II 19.12.2010)

• lathe
• capstan lathe
• metal spinning lathe
• milling machine

Explanation:

• A fly cutter is used on milling machine.

In gang milling —-? (RRB Allahabad SSE 19.12.2010)

• Several jobs can be performed in one setup
• One job is completed on several milling machines located together
• Two or more cutters are mounted on the arbor and all of them remove the metal simultaneously
• None of these

Explanation:

• In gang milling, two or more cutters are mounted on the arbor and remove metal simultaneously.

What is the function of a shank in a broaching machine? RRB JE Stage 2 (22.04.2025 9:00 AM-11:00 AM)

• Guides the broach through the material and maintains tool alignment
• Holds the broach in place and gives it a rotary motion
• Removes chips and coolant from the cutting area
• Breaks up the chips generated during the broaching process

Explanation:

• The shank connects the broach to the machine, guides it through material, and maintains tool alignment.

Broaching is a ____ that uses a toothed tool to remove the material from the workpiece. RRB JE (Re-Exam) 04.06.2025

• grinding process
• boring process
• machining process
• casting process

Explanation:

• Broaching is a machining process that uses a toothed tool (broach) to remove material.

____ is/are the most widely used material for the broaches in a broaching operation. RRB JE Stage 2 (22.04.2025 9:00 AM-11:00 AM)

• High speed steel
• Silver-copper combination
• Metal matrix composites
• Copper

Explanation:

• High speed steel is widely used material for broaches in broaching operation.

Broaching of outside surfaces is called —-? RRB JE Stage 2 (22.04.2025 2:30-4:30 PM)

• internal broaching
• hole broaching
• hallow broaching
• surface broaching

Explanation:

• When broaching is applied to outside surfaces, it is called surface broaching.

To machine an internal hole in a broaching operation, the broach is gripped by the —-? RRB JE Stage 2 (22.04.2025 2:30-4:30 PM)

• puller at the pilot
• puller at the face of the teeth
• puller at the flute
• puller at the shank end

Explanation:

• To machine an internal hole in broaching, the broach is gripped by the puller at the pilot.

Which of the following teeth does a broach have? RRB JE 30.08.2019, Ist Shift

• Semi finishing teeth
• All of the options
• Roughing teeth
• Finishing teeth

Explanation:

• A broach has roughing teeth, semi-finishing teeth, and finishing teeth. It is applicable for both cutting and finishing processes.

External broaching tools are —-? (RRB Bhopal SSE 09.09.2012)

• push type
• press type
• both pull and push type
• pull type

Explanation:

• External broaching tools are both pull and push type.

What is the name of the broaching, where the work and the broaching tool move across each other? (RRB Jammu SSE 09.09.2012)

• Surface broaching
• Pull broaching
• Continuous broaching
• Push broaching

Explanation:

• In surface broaching, work and broaching tool move across each other.

The main advantage of broaching process is —-? (RRB Bhubneshwar JE II 29.11.2008)

• to do the thin jobs
• removal of material in one stroke
• to use the single point tool
• removal of material in up & down stroke

Explanation:

• Main advantage of broaching is removal of material in one stroke.

Broaching uses a multi-point cutting tool having a series of —-? (DMRC JE 22.09.2017)

• slots
• similar to cramer
• progressive cutting teeth
• teeth

Explanation:

• Broaching uses multipoint cutting tool with a series of progressive cutting teeth.

Which of the following method is particularly useful to produce dimensionally accurate internal gears of fine surface finish? (JMRC JE 10.06.2017) (RRB Mumbai JE 19.12.2010)

• Hobbing
• Broaching
• Milling
• Honing

Explanation:

• Broaching is particularly useful for dimensionally accurate internal gears with fine surface finish.

Normally, how many types of broaches are there? (BMRCL JE 24 Feb.2019)

• 9
• 4
• 6
• 8

Explanation:

• Normally four types of broaches: Pull broaching, Push broaching, Surface broaching, and Continuous broaching.

Most accurate Boring machine is —-? (RRB Bhubneshwar JE-11 19.12.2010)

• Precision Boring machine
• Jig boring machine
• Deep hole boring machine
• Vertical boring machine

Explanation:

• Jig boring machine is the most accurate boring machine, used for jigs, fixtures, and tools requiring high accuracy.

The correct sequence of processes for getting smooth surface is as follows: (I – Grinding, II – Honing, III – Burnishing, IV – Buffing) (RRB Allahabad SSE 19.12.2010)

• I → IV → II → III
• I → II → III → IV
• I → II → IV → III
• I → IV → III → II

Explanation:

• Sequence for surface finish: Grinding → Honing → Burnishing → Buffing.

To have a good surface finish, burnishing tool is used —-? (RRB Mumbai JE 05.10.2008)

• during broach
• after broach
• before broach
• after chip breaking method

Explanation:

• Burnishing tool is used after broach for good surface finish. Burnishing flattens high spots by plastic flow of metal.

Which one of the following process results in the best accuracy of the hole made? (RRB JE (Shift-III), 16.09.2015)

• Drilling
• Reaming
• Broaching
• Boring

Explanation:

• Reaming results in best accuracy of hole. Sequence: Drilling → Boring → Reaming.

Among the following machining processes, which can be used for machining flat surfaces? 1. Shaping 2. Milling 3. Broaching (RRB Mumbai SSE 05.10.2008)

• 1 and 2 only
• 1 and 3 only
• 2 and 3 only
• 1, 2 and 3

Explanation:

• Shaping, milling, and broaching all can be used for producing flat surfaces.

Spline-holes are machined by —-? (RRB JE (Shift-3), 28.08.2015)

• Milling
• Boring
• Drilling
• Broaching

Explanation:

• Spline holes and square holes are difficult to machine by other means, so they are usually done by broaching.

Which of the following functions is performed by the finishing teeth of a broach? (RRB Mumbai SSE 19.12.2010)

• Removes maximum metal
• Removes minimum metal
• Performs burnishing operation
• Performs shaping operation

Explanation:

• Finishing teeth of a broach perform burnishing operation.

For machining yellow metals and free-cutting steels, ____ is/are used as cutting fluids. RRB JE Stage 2 (22.04.2025 9:00 AM-11:00 AM)

• insoluble oils
• water soluble oils
• water
• germicides and water

Explanation:

• Water soluble oils (emulsifiable oils) are used for machining yellow metals and free-cutting steels, offering excellent cooling and lubrication.

What is the function of coolants in metal cutting or machining operation? RRB JE Stage 2 (22.04.2025 2:30-4:30 PM)

• Provides higher friction and wear between tool and workpiece
• Decreases adhesion between chip and tool
• Reduces machinability and machining forces
• Increases wear and tear of tools and decrease tool life

Explanation:

• Coolants decrease adhesion between chip and tool, reducing friction and improving machining performance.