50) The cooling system used for supersonic aircrafts and rockets is

Simple air cooling system

Bootstrap air cooling system

Reduced ambient air cooling system

Regenerative air cooling system

Answer is:

Regenerative air cooling system

ISRO Technician-B MRAC Question Paper - 2019 (Set-1) with Answer Key

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51) In order to cool and dehumidify a stream of moist air, it must be passed over the coil at a temperature

Which lies between the dry bulb and wet bulb temperatures of the incoming stream

Which lies between the wet bulb and dew point temperatures of the incoming stream

Which is lower than the dew point temperature of the incoming stream

of adiabatic saturation of incoming stream

Answer is:

Which is lower than the dew point temperature of the incoming stream

52) The superheating in a refrigeration cycle

Does not alter C.O.P.

Increases C.O.P.

Decreases C.O.P.

None of these

Answer is:

Decreases C.O.P.

53) At lower temperatures and pressures, the latent heat of vaporisation of a refrigerant

Decreases

Increases

Remain same

Depends on other factors

Answer is:

Increases

54) Heat required (in k cal) for converting 1 kg of water at 40 deg C to fully steam

600

210

2394

Answer is:

600 ISRO Technician-B MRAC Question Paper - 2019 (Set-1) with Answer Key

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50) The cooling system used for supersonic aircrafts and rockets is

Regenerative air cooling system

ISRO Technician-B MRAC Question Paper - 2019 (Set-1) with Answer Key

Related ISRO Technician-B MRAC Question Paper - 2019 (Set-1) with Answer Key

51) In order to cool and dehumidify a stream of moist air, it must be passed over the coil at a temperature

Which is lower than the dew point temperature of the incoming stream

52) The superheating in a refrigeration cycle

Decreases C.O.P.

53) At lower temperatures and pressures, the latent heat of vaporisation of a refrigerant

Increases

54) Heat required (in k cal) for converting 1 kg of water at 40 deg C to fully steam

600

ISRO Technician-B MRAC Question Paper - 2019 (Set-1) with Answer Key