The distance from pipe boundary, at which the point velocity is equal to average velocity in case of turbulent flow (when R is the radius of the pipe), is
A.0.111 R
B.0.223 R
C.0.446 R
D.0.892 R
Category: Mechanical Engineering Mcqs
Which of the following is a non-destructive test?
A.Charpy test
B.Izod Impact test
C.Tensile test
D.Cupping test
E.X-ray test
The desirable temperature inside an air conditioned auditorium is
A.0?C
B.5?C
C.10?C
D.20?C
It is desired to punch a hole of 20 mm diameter in a plate 20 mm think. If the shear stress of mild steel is 30 kg/mm2, the force necessary for punching would be approximately in the range
A.10 – 15 tonnes
B.15 – 20 tonnes
C.20 – 25 tonnes
D.25 – 35 tonnes
E.35 – 40 tonnes
Essential feature of deflation is
A.Fall in prices
B.Fall in exports
C.Rise in production
D.All of the above
E.None of the above
In a SI engine the advancing of spark timing will
A.Increase knocking tendency
B.Reduce knocking tendency
C.Not have any effect
D.Depends on intensity of spark only
E.None of the above
In case of a Saddle key
A.The key way is cut in shaft only
B.The key way is cut in both shaft and hub
C.The key is welded to shaft
D.The key ways is cut in hub only
E.The key is made of flexible material
In which of the following heat exchanger, heat is extracted from air?
A.Regenerator
B.Reheater
C.Intercooler
D.All of the above
In order to measure/detect materials by non-destructive testing the method generally used is
A.Acoustic emission
B.Infrared radiometer
C.Liquid crystallography
D.Thermochemic point
E.Mossbanser effect
Air standard efficiency of an I.C. engine depends on
A.Compression ratio
B.Speed of operation
C.Fuel used
D.Torque
E.All of the above
