1 N/m2 pressure is equivalent to
A.1 pascal
B.10-5 bar
C.10-2 kg/m sec2
D.7.5 x 10-3 mm Hg
E.Any of the above
Category: Mechanical Engineering Mcqs
Rough surface of casting may result from
A.high permeability of sand
B.large grain size
C.soft ramming
D.any of the above
The Erichsen cupping number of a sheet metal indicates its
A.Toughness
B.Surface roughness
C.Hardness
D.Ductility
E.Drawing quality
Thermit welding differs from other methods of welding in the following way:
A.It does not use heat
B.It employs exothermal chemical reaction for developing high temperature
C.It is less time consuming
D.It does not require electrodes
E.None of the above
The ratio of mass of water vapour associated with unit mass of dry air to the mass of water vapour associated with unit mass of dry air saturated at the same temperature is known as
A.Relative humidity
B.Specific humidity decreases
C.Humidity ratio
D.Degree of saturation
E.None of the above
In any process the maximum amount of mechanical energy that can be converted to heat
A.Depends upon the amount of friction
B.Depends upon the intake and exhaust temperature
C.Depends upon whether kinetic energy is involved
D.Is 50%
E.Is 100%
In case of centrifugal compressors, the phenomenon of air stream not able to follow the blade contour of an axial compressor is known as
A.Surging
B.Stalling
C.Regeneration
D.Recirculation
E.Feedback
As per IS code, C 65 steel will have carbon percentage of
A.0.065 percent
B.0.6 to 0.7 percent
C.6 to 7 percent
D.00 to 70 percent
E.None of the above
The magnitude of water hammer depends on
A.The length of pipeline
B.The speed at which the valve is closed
C.To elastic properties of the liquid flowing through the pipe
D.The elastic properties of the pipe material
E.All of the above
In a vapour compression refrigeration cycle, high head pressure is indicated which does not change even when compressor is stopped and allowed to cool. The probable cause may be
A.High refrigerant charge
B.Low refrigerant charge
C.Air in the system
D.High vapour pressure
E.Any of the above
