Vapour power cycle C04

Which of the following is not a component of steam power plant?

• Boiler

• Steam turbine

• Condenser

• None of the above

A subcooled or compressed liquid is

• about to undergo evaporation

• not about to undergo evaporation

• at a temperature below saturation temperature

• at a temperature above saturation temperature

In Rankine cycle, during which processes the pressure remains constant.

• Condensation

• Evaporation

• Expansion

• Compression

Triple point is the state at which a pure substance exists in _____

• solid state

• liquid state

• vapour state

• solid, liquid and vapor states simultaneously

(a)   point or state is the point where saturated liquid line and saturated vapour line meets.

When the value of dryness fraction x = 0 and x = 1, the substance exists respectively in ____ and ____ states.

• superheated and saturated vapour

• subcooled and saturated liquid

• saturated liquid and saturated vapour

• superheaated and saturated liquid

The difference between the temperature of the superheated vapour and the saturation temperature at a given pressure is called the _____.

• Expansion

• superheating

• condensation

• degree of superheat

The capacity of a steam power plant is often expressed in terms of _____

• steam rate

• heat rate

• work ratio

• back work ratio

For water at 1 MPa, the specific volumes are given as v_g = 0.19444 and v_f = 0.001127 m³/kg. What is the change in specific volume in m³/kg during evaporation?

• 0.001127

• 0.19444

• 0.80556

• 0.193313

For water at 0.5 MPa, the enthalpy values are given as h_f = 640.21, h_g = 2748.7 and h_fg = 2108.5 kJ/kg. What is the latent heat of vaporization in kJ/kg?

• 640.21

• 2748.7

• 2108.5

• 3388.91