The bituminous coal is non-caking if its carbon content is_______________?

A. 78-81%
B. 81-85%
C. 85-90%
D. 90-95%

In a throttling process________________?

A. Steam temperature remaisn constant
B. Steam pressure remains constant
C. Steam enthalpy remains constant
D. Steam entropy remains constant

Water at pressure of 4 kg/cm2 and 160°C temperature when exposed to atmosphere will_________________?

A. Boil
B. Flash i.e. get converted into steam
C. Remain as it was
D. Cool down

The pressure at which latent heat of vaporisation of water is zero, is_________________?

A. below atmospheric pressure
B. 1 kg/cm2
C. 100 kg/cm2
D. 170 kg/cm2

The latent heat of steam with increase of pressure__________________?

A. Remains same
B. Increases
C. Decreases
D. Behaves unpredictably

While steam expands in turbines, theoretically the entropy________________?

A. Remains constant
B. Increases
C. Decreases
D. Behaves unpredictably

At which pressure the properties of water and steam become identical_________________?

A. 0.1 kg/cm2
B. 1 kg/cm2
C. 100 kg/cm2
D. 225.6 kg/cm2

Pick up the wrong statement about critical condition of steam___________________?

A. Latent heat is zero
B. Liquid directly becomes steam
C. Specific volume of steam and liquid is same
D. This is the maximum pressure limit

Adiabatic process is________________?

A. Essentially an isentropic process
B. Non-heat transfer process
C. Reversible process
D. Constant temperature process

Mechanical equivalent of heat for 1 kcal or Joule’s equivalent is equal to_________________?

A. 421 kgm
B. 421 kgm
C. 539 kgm
D. 102 kgm