28) A ton of refrigeration is defined as

The heat of fussion absorbed by melting 1 ton of pure ice at 32 °C in 24 hours

The heat of fussion absorbed by melting 1 ton of pure ice at 0 °C in 1 hours

The heat of fussion absorbed by melting 1 ton of pure ice at 0 °C in 24 hours

None of these

Answer is:

The heat of fussion absorbed by melting 1 ton of pure ice at 0 °C in 24 hours

KPCL AE Mechanical Question Papers - 2015 with Answer Key

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29) Which of the following are blamed for ozone layer depletion?

(a) Chloro-fluoro-carbon refrigerants

(b) Hydrofluorocarbons

Both (A) and (B)

None of these

Answer is:

Both (A) and (B)

30) What is Nusselt number?

The ratio of energy transferred by convection to that by radiaton

The ratio of energy transferred by convection to that by conduction

The ratio of energy transferred by conduction to that by radiation

All the above

Answer is:

The ratio of energy transferred by convection to that by conduction

31) Which of the following process is uded to prevent formation of iron oxide by applying a protective zinc coating to iron?

Galvanizing

Oxidizing

Anit-oxidizing

None of these

Answer is:

Galvanizing

32) Which of the following is the heat treatment process in which iron or steel absorbs carbon liberated when the metal is heated in the process of a carbon bearing material, in order to make the metal harder?

Carbonization

Carbonation

Carburizing

Carburation

Answer is:

Carburizing

KPCL AE Mechanical Question Papers - 2015 with Answer Key

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28) A ton of refrigeration is defined as

The heat of fussion absorbed by melting 1 ton of pure ice at 0 °C in 24 hours

KPCL AE Mechanical Question Papers - 2015 with Answer Key

Related KPCL AE Mechanical Question Papers - 2015 with Answer Key

29) Which of the following are blamed for ozone layer depletion?

Both (A) and (B)

30) What is Nusselt number?

The ratio of energy transferred by convection to that by conduction

31) Which of the following process is uded to prevent formation of iron oxide by applying a protective zinc coating to iron?

Galvanizing

32) Which of the following is the heat treatment process in which iron or steel absorbs carbon liberated when the metal is heated in the process of a carbon bearing material, in order to make the metal harder?

Carburizing

KPCL AE Mechanical Question Papers - 2015 with Answer Key