Top 350+ Solved Heat Engines MCQ Questions Answer
Q. Reheating of steam for steam turbine cycle is done primarily to
a. Reduce dryness fraction of exhaust steam
b. Increase the pressure of steam in the condenser
c. Increase boiler chimney draught
d. Improve thermal efficiency of the plant
e. All of the above
Q. Morse test is conducted on
a. Multi-cylinder engines
b. Vertical engines
c. Horizontal engines
d. Vet engines
e. Single cylinder engines
Q. Capacitor kVA required to bring the power factor of a 500 kW load 70% to 85% would be
a. 100 kVA
b. 250 kVA
c. 300 kVA
d. 150 kVA
e. 200 kVA
Q. The function of a condenser in a steam power plant is
a. To preheat feed water with exhaust steam
b. To condense feed water
c. To utilise heat of exhaust steam
d. To act as a heat sink
e. To reduce back pressure
Q. For diatomic gas flowing through a nozzle the critical pressure ratio is given by
a. 0.75
b. 1
c. 3.546
d. 0.528
e. 0.577
Q. Suri-transmission is
a. hydro-mechanical
b. mechanical-electrical
c. Carbon dioxide
d. electro-pneumatic
e. hydro-pneumatic
Q. The temperature of the blades of a gas turbine may be closer to
a. 350?C
b. 212?C
c. 1200?C
d. 600?C
e. 100?C
Q. Compression ratio for diesel engines is generally in the range
a. 25 to 30
b. 5 to 10
c. 22 to 25
d. 14 to 22
e. 10 to 14
Q. In case of pressure compounded impulse turbine, for the steam while flowing through the nozzle of second stage
a. Pressure drops while velocity increases
b. Pressure increases while velocity decreases
c. Pressure and velocity both increase
d. Pressure increases
e. Pressure and velocity both decrease
Q. Which spark plug will have lower heat rating
a. W 350 T1
b. W 300 T1
c. W 95 T1
d. W 145 T1
e. W 225 T1
Q. In a petrol engine fuel lock generally occurs in
a. suction manifold
b. Carbon dioxide
c. inlet valve
d. Pump
e. gauge lines
Q. As per IS specifications the endurance test for engines is conducted for
a. 500 hours
b. 1000 hours
c. 100 hours
d. 300 hours
e. 200 hours
Q. In a pumping installation the suction line is is 4 metre long and suction pipe diameter is 100 mm. Now if the suction pipe is replaced by a pipe combination consisting of 2 metres of 100 mm diameter pipe joined with 2 metres of 150 mm diameter pipe, the suction heat will become
a. 6 metres
b. 4 metres
c. 2 metres
d. 1 metre
e. None of the above
Q. Standard air is air at
a. Atmospheric conditions at any specific location
b. 1 kg/cm2 and atmospheric temperature (Relative humidity of 64%)
c. 1 kg/cm2 and 20?C (Relative humidity of 36%)
d. 1 kg/cm2 and 0?C (Relative humidity of 36%)
e. None of the above
Q. Which of the following is not needed in case of magneto ignition?
a. Coil
b. Capacitor
c. Distributor
d. Battery
e. Spark plug