12.RRB ALP CBT2 RAC Question bank

RAC

Damper in an AC system is used for ……….

  • Reducing pressure
  • Varying flow rate
  • Both (a) and (b)
  • None of these

Air locks are ……….

  • Simply the interlocking spaces between conditioned and unconditioned/outside spaces
  • Blockage of air due to damper
  • Stagnated air at some locations
  • None of these

The fans having ………. type/s of blades are preferred in air-conditioning system.

  • Forward curved
  • Radial
  • Backward curved
  • Both forward and backward curved

HEPA stands for ……….

  • High energy particulate air
  • High efficiency particulate air
  • High entry particulate air
  • High effective pressurized air

The main working substance in air-conditioning is ……….

  • Dry air
  • Dry ice
  • Moist air
  • Water vapour

 

12.RRB ALP CBT2 RAC Question bank