67) In larger industrial and commercial reciprocating compression systems, refrigerant widely used is

Ammonia

Carbon dioxide

Sulphur dioxide

R-12

Answer is:

Ammonia

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

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68) The refrigerant for a refrigerator should have

High sensible heat

High total heat

High latent heat

Low latent heat

Answer is:

High latent heat

69) The COP of a refrigerator working between temperature 33 degree C and - 3 degree C is

7.5

0.091

-11

Answer is:

7.5

70) One ton of refrigeration is

The standard unit used in refrigeration problems

The cooling effect produced by melting 1 ton of ice

The refrigeration effect to freeze 1 ton of water at 0 degree C into ice at 0 degree C in 24

The mass of refrigerant gas required to produce 1 ton of ice in 24 hours

Answer is:

The refrigeration effect to freeze 1 ton of water at 0 degree C into ice at 0 degree C in 24

71) A 240V, 120W lamp has a working resistance of

20 Ohm

60 Ohm

120 Ohm

480 Ohm

Answer is:

480 Ohm

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

For more MCQ's Click Here

67) In larger industrial and commercial reciprocating compression systems, refrigerant widely used is

Ammonia

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

68) The refrigerant for a refrigerator should have

High latent heat

69) The COP of a refrigerator working between temperature 33 degree C and - 3 degree C is

7.5

70) One ton of refrigeration is

The refrigeration effect to freeze 1 ton of water at 0 degree C into ice at 0 degree C in 24

71) A 240V, 120W lamp has a working resistance of

480 Ohm

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