In rotary compressors, slip factor is the ratio of
A.stagnation pressure to static pressure
B.isentropic work done to actual work
C.outlet whirl velocity to the blade velocity
D.none of the above
Category: Mechanical Engineering Mcqs
Coarse salt is hygroscopic and corrosive in weight. It can be transported using
A.belt conveyors
B.flight conveyors
C.pneumatic conveyors
D.Any of the above
The level of electroyte in automobiles battery should be
A.15 mm below the top of plates
B.5 – 10 mm below the top of plates
C.Exactly at the level of the plates
D.10 – 15 mm above top of plates
E.Upto the maximum permissible level
The main disadvantage of hard water is
A.Higher density
B.More turbidity
C.Foul smell
D.Bad taste
E.Increased soap consumption
The gas turbine works on
A.Rankine cycle
B.Carnot cycle
C.Otto cycle
D.Brayton cycle
E.Erricson cycle
In a Joule cycle, the heat is rejected at
A.Constant volume
B.Constant pressure
C.Constant temperature
D.Constant enthalpy
E.Constant entropy
Which of the following device is primarily used to measure pressure?
A.Bourdon tube
B.Kundts tube
C.Hygrometer
D.Rotameter
E.All of the above
The included angle in Acme threads is
A.29?
B.47
C.50?
D.55?
E.60?
For combustion of one kg of carbon the quantity of oxygen required (air contains 23% by wight of oxygen) is
A.2.62 kg
B.3.67 kg
C.8 kg
D.11.6 kg
E.12 kg
The hardness obtained by hardening process does not depend upon
A.Carbon content
B.Work size
C.Atmospheric temperature
D.Quenching rate
