When a bicycle pump is operated slowly the process of compression will be nearly
A.Isothermal process
B.Constant volume process
C.Constant pressure process
D.Throttling process
E.Free compression
Category: Thermodynamics Mcqs
In axial flow compressors, the phenomenon of stalling of blades occurs when
A.Blades vibrate violently
B.Blades fail due to creep
C.Air stream is not able to follow the blade contour
D.Air stream blocks the passage
E.Air stream flows with sonic velocity
Which of the following relations is not applicable to free expansion process?
A.Heat supplied = Zero
B.Heat rejected = Zero
C.Work done = Zero
D.Change in temperature = Zero
E.Change in internal energy = Zero
For diatomic gas flowing through a nozzle the critical pressure ratio is given by
A.1
B.0.528
C.3.546
D.0.577
E.0.75
Which of the following valve is installed between the boiler and the feed pump?
A.Steam stop valve
B.Flow of cock
C.Feed check valve
D.Throttle valve
If during a process, the entropy of the isolated system increases, the process is
A.Adiabatic
B.Isothermal
C.Ideal
D.Reversible
E.Irreversible
A Brayton cycle is also a reversed
A.Carnot cycle
B.Rankine cycle
C.Joule cycle
D.Otto cycle
E.Dual cycle
Which of the following turbines cannot be set below the maximum tail race level
A.Pelton
B.Francis
C.Kaplan
D.Propeller
For maximum specific output of a constant volume cycle
A.The working fluid should be air
B.The speed should be high
C.Suction temperature should be high
D.Exhaust pressure should be high
E.Temperature of the working fluid at the end of compression and expansion should be equal
The efficiency of a dicsel cycle will be maximum when
A.Speed is high
B.Injection pressure is high
C.Cylinder is water cooled
D.Cut off is zero
E.Engine is super-charged
