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Engineering
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ME Set-1
Steam Nozzles and Turbines
9

Steam Nozzles and Turbines MCQ with Answers

9) In a nozzle, whole frictional loss is assumed to occur between

inlet and thoroat

inlet and outlet

throat and exit

all of these

Answer is:

throat and exit

Steam Nozzles and Turbines MCQ with Answers

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Related Steam Nozzles and Turbines MCQ with Answers

10) The critical pressure ratio for initially wet steam is

0.546

0.577

0.582

0.601

Answer is:

0.582

11) The isentropic enthalpy drop in moving blade is two-third of the isentropic enthalpy drop in fixed blades of a turbine. The degree of reaction will be

0.4

0.56

0.67

1.67

Answer is:

0.4

12) The impulse reaction turbine has its driving force

as an impulsive force

as a reaction force

partly as an impulsive force and partly as a reaction force

none of the above

Answer is:

partly as an impulsive force and partly as a reaction force

13) The efficiency of reaction turbine is maximum when (where ? = Angle made by the absolute velocity (V) at inlet)

V_b = 0.5 V cos ?

V_b = V cos ?

V_b = 0.5 V² cos ?

V_b = V² cos ?

Answer is:

V_b = V cos ?

Steam Nozzles and Turbines MCQ with Answers

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