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

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

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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

72) The length of a certain conductor of resistance 2000 is doubled and its cross-sectional area is halved. Its new resistance is

1000 Ohm

8000 Ohm

500 Ohm

4000 Ohm

Answer is:

8000 Ohm

73) A 100 watts bulb, if switched on for a day, the energy consumed in power units is

2.4

0.6

100

2400

Answer is:

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

For more MCQ's Click Here

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

7.5

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

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

72) The length of a certain conductor of resistance 2000 is doubled and its cross-sectional area is halved. Its new resistance is

8000 Ohm

73) A 100 watts bulb, if switched on for a day, the energy consumed in power units is

2.4

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