human resource interview questions

Question 1: A turbine is said to have an axial discharge when the steam leaves the blade tip at __________ to the direction of the blade motion.

90°

Question 2: A nozzle is said to be a convergent nozzle

when the cross-section of the nozzle decreases continuously from entrance to exit

Question 3:The flow through a nozzle is regarded as

isentropic flow

Question 4: The ratio of total useful heat drop to the total isentropic heat drop, is called

internal efficiency

Question 5: The rate of discharge through the nozzle __________ when the exit pressure is gradually reduced.

increases

Question 6:In a nozzle, whole frictional loss is assumed to occur between

throat and exit

Question 7:The impulse reaction turbine has its driving force

partly as an impulsive force and partly as a reaction force

Question 8:The efficiency of reaction turbine is maximum when (where α = Angle made by the absolute velocity (V) at inlet)

Vb = V cos α

Question 9:A regenerative steam cycle renders

decreased work output per unit mass of steam as well as increased thermal efficiency

Question 10:De-Laval turbine is a

single rotor impulse turbine

Question 11: The reheat factor is the ratio of the

cumulative heat drop to the isentropic heat drop

Question 12: Thermal equilibrium means that the flow of steam is

isentropic

Question 13: When the back pressure of a nozzle is below the designed value of pressure at exit of nozzle, the nozzle is said to be

underdamping

Question 14: The ratio of the workdone on the blades to the energy supplied to the blades, is called

blading efficiency

Question 15:The discharge is __________ at critical pressure.

maximum

Question 16:The steam leaves the nozzle at a

low pressure and a high velocity

Question 17: The critical pressure gives the velocity of steam at the throat

equal to the velocity of sound

Question 18:Multi-stage steam turbines are of the

velocity compounded type, reaction type, pressure compounded type

Question 19: Which of the following statement is correct?

The expansion of steam in a nozzle follows Rankine cycle., The friction in the nozzle increases the dryness fraction of steam., The pressure of steam at throat is called critical pressure.

Question 20:The difference of supersaturated temperature and saturation temperature at that pressure is called

degree of undercooling

steam-nozzles-and-turbines interview questions