59) Ammonia is

Non-inflammable

Non-toxic

Toxic and non-inflammable

Highly toxic and inflammable

Answer is:

Highly toxic and inflammable

ISRO Technician-B MRAC Question Paper - 2017 (Set -1) with Answer Key

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60) At 100% relative humidity, the temperatures - dry bulb, wet bulb, dew point and saturation are

different

two equal, two different

three equal, one different

equal

Answer is:

equal

61) A refrigerant with highest critical pressure is

Carbon-dioxide

Ammonia

Freon-11

Freon-22

Answer is:

Freon-22

62) Approach of cooling tower means

difference in temperature of the cold water and atmospheric temperature

difference in temperature of hot water entering and cold water leaving

amount of heat thrown away by the cooling tower in kcal/hr

difference in temperature of the cold water leaving the cooling tower and the wet bulb temperature of surrounding air

Answer is:

difference in temperature of the cold water leaving the cooling tower and the wet bulb temperature of surrounding air

63) A power element in thermostatic expansion valve having the same refrigerant charged as the refrigeration system is called

Cross charged valve

Straight charged valve

Pilot operated solenoid valve

Three way mixing valve

Answer is:

Straight charged valve

ISRO Technician-B MRAC Question Paper - 2017 (Set -1) with Answer Key

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59) Ammonia is

Highly toxic and inflammable

ISRO Technician-B MRAC Question Paper - 2017 (Set -1) with Answer Key

Related ISRO Technician-B MRAC Question Paper - 2017 (Set -1) with Answer Key

60) At 100% relative humidity, the temperatures - dry bulb, wet bulb, dew point and saturation are

equal

61) A refrigerant with highest critical pressure is

Freon-22

62) Approach of cooling tower means

difference in temperature of the cold water leaving the cooling tower and the wet bulb temperature of surrounding air

63) A power element in thermostatic expansion valve having the same refrigerant charged as the refrigeration system is called

Straight charged valve

ISRO Technician-B MRAC Question Paper - 2017 (Set -1) with Answer Key