If the compressor of a refrigeration system is noisy, it shows that
A.Compressor drive coupling is loose
B.Lack of oil
C.Internal parts of compressor broken
D.Compressor or motor loose on base
E.Any of the above
Category: Engineeeing Mcqs
In case of belt drives, the effect of centrifugal tension is
A.To reduce the driving power
B.To increase the driving power
C.Not appreciable on driving power
D.Dependent on other factors
E.None of the above
The pitch circle of a cam is
A.The smallest circle drawn to the pitch curve
B.Thesmallest circle drawn to the cam profile from the centre of rotation of a radial cam
C.The circle fitting in the cam profile
D.The circle with centre as the centre of cam axis and radius such that it passes through the point
E.None of the above
Trade will occur when
A.Personnel values are different
B.Middle-men can profit by making trade
C.The exchange leads to more preferred situation for the traders
D.There is enough disparity between the consumption-substitution ratios to cover the costs of trades
E.All of the above
The chemical formula of cementite is
A.FeC
B.Fe3C
C.FeC3
D.Fe2C3
E.Fe3C2
A pirani gauge works on the principle of change of
A.Thermal conductivity of medium
B.Electrical resistivity
C.Conductance
D.Capacitance
E.Relative humidity
A stud is
A.Screw with long threads
B.Screw with circular heads
C.Screw with cylindrical head
D.Headless scew
E.Oval heads screw
Which one of the following is the trouble due to clutch?
A.Dragging
B.Rattling
C.Slipping
D.Grabbing
E.All of the above
The blades of a turbine are made of
A.Cast iron
B.Nickel alloy
C.Stainless steel
D.Alloy steel
E.High speed steel
With increase in pressure ratio, thermal efficiency of a simple gas turbine plant with fixed turbine inlet temperature
A.increases
B.decreases
C.first increases and then decreases
D.none of the above
