The freezing point of ammonia is
A.0?C
B.? 20?C
C.? 77.8?C
D.? 132.5?C
E.? 202.5?C
Category: Mechanical Engineering Mcqs
Moisture in Freon refrigeration system causes
A.Ineffective refrigeration
B.Damage to compressor
C.High power consumption
D.Freezing of automatic regulating valve
E.None of the above
Rupture stress is
A.Proof stress
B.Breaking stress
C.Highest value of stress
D.Stress given by dividing the load at the moment of incipient fracture, by the area supporting that load
E.Stress at breaking point
For the same power and same speed, the flywheel of a two stroke engine as compared to that of a four stroke engine will be
A.Bigger
B.Small
C.Same size
D.Different shape
E.There is no correlation
If the Mach number of a flow is 3 the flow is known as
A.Super-supersonic
B.Supersonic
C.Sonic
D.Sub-sonic
E.None of the above
Differential gear box oil is usually renewed after
A.1000 km
B.2500 km
C.6000 km
D.2500 – 6000 km
E.10000 – 20000 km
Cores are made from core sand mixed with the binder which may be
A.linseed oil
B.turpentine
C.cement
D.none of the above
The highest voltage at which the power is transmitted in India is
A.33 kV
B.66 kV
C.132 kV
D.220 kV
E.400 kV
A sterling cycle consists of
A.Two isothermal and two adiabatic processes
B.Two adiabatic and two isentropic processes
C.Two adiabatic and two constant pressure processes
D.Two constant volume and two constant pressure processes
E.Two isothermal and two constant volume processes
