The rate of evaporation of water will be low when
A.Reactive humidity is zero
B.Relative humidity is less than 50%
C.Relative humidity is high
D.Rate of evaporation does not depend on relative humidity
Category: Mechanical Engineering Mcqs
In a refrigeration system a condenser
A.Receives liquid refrigerant and supplies liquid refrigerant
B.Receives vapour refrigerant and supplies vapour refrigerant
C.Receives vapour refrigerant and supplies liquid refrigerant
D.Receives liquid refrigerant and supplies liquid refrigerant
E.None of the above
The loss of pressure head for the laminar flow through pipes varies
A.As the square of velocity
B.Directly as the velocity
C.As the inverse of the velocity
D.None of the above
Prony brake is used for testing of
A.Small engines
B.Large engines
C.Engines having small flywheel
D.Slow speed engines
E.High speed engines
When two concurrent and coplaner forces P and Q act at an angle of 180?, their resultant will be a
A.couple
B.moment equal to PQ
C.zero
D.(P-Q)
The angle of friction is
A.The angle which frictional force makes with the normal
B.The anle at which the force applied from external souce will cause movement
C.The angle at which fictional force is inclined to external force
D.The angle between the normal reaction and the resultant of normal reaction and the limiting friction
E.None of the above
Generally speaking for better efficiency of IC engine the valves must
A.open before the beginning of a stroke and close before the end of a stroke
B.open after the beginning of a stroke and close before the end of a stroke
C.open after the beginning of a stroke and close after the end of a stroke
D.open before the beginning of a stroke and close after the end of a stroke
In case the clutch of a tractor slips, the probable cause cannot be
A.high engine speed
B.worn out clutch plates
C.weak or broken pressure springs
D.misalignment of plates
Chaplets are
A.core binders
B.core supports
C.core projections
D.mould seats to support core
A body is executing simple harmonic motion of amplitude 1 cm. Its velocitywhile passing through the central point is 10 mm/sec. Its frequency will be
A.1 rps
B.1.59 rps
C.1.77 rps
D.2.22 rps
E.2.99 rps
