Scintillation counter can detect
A.beta rays
B.X-rays
C.gamma rays
D.All of the above
Category: Mechanical Engineering Mcqs
In a lead cell battery the voltage per cell is
A.1 volt
B.1.1 volt
C.1.5 volt
D.2 volts
E.6 volts
With ideal regencrative heat exchanger, the thermal efficiency of gas turbine cycle is
A.equal to work ratio
B.is less than work ratio
C.is more than work ratio
D.none of the above
Out of the following materials which one will have lowest temperature of freezing?
A.Lead
B.Zinc
C.Gold
D.Copper
E.Tungsten
If the temperature of the source is increased, the efficiency of the Carnot engine
A.Decreases
B.Increases
C.Does not change
D.Will be equal to the efficiency of a practical engine
E.Depends on their factors
In case of cored aluminium castings, the contraction allowance is
A.more than the normal allowance
B.less than the normal allowance
C.same as the normal allowance
Which of the following does not change during an-ideal throttling process?
A.Enthalpy
B.Enthalpy and temperature
C.Temperature and pressure
D.Pressure and volume
E.Pressure, volume and temperature
Steam condenser tubes are generally made of
A.Admiralty alloy
B.Babbit metal
C.Brass
D.Bronze
E.Bell metal
In a newly charged ammonia compression system, the clicking sound in the expansion valve indicates
A.High pressure after compression
B.Excessive ammonia charged
C.Lack of ammonia
D.Evaporator coils chocked
E.Leakage of ammonia
In case of a four cylinder diesel engine, the heat carried away by exhaust gases will be
A.5 to 7 percent
B.7 to 10 percent
C.10 to 20 percent
D.25 to 35 percent
E.50 to 70 percent
