Top 350+ Solved Heat Engines MCQ Questions Answer
Q. Water gas is a mixture of
a. CO2 and N2
b. CO and H2
c. SO2, CO2 and N2
d. N2 and H2
e. CO, CO2 and SO2
Q. A jet engine has
a. Propeller in front
b. Propeller in back
c. One propeller in front and one propeller in back
d. No propeller
e. None of the above
Q. A Lenoir cycle has a top temperature in the cycle
a. More than that of Otto cycle
b. Equal to diesel cycle
c. Weight of engine
d. Between Otto and diesel cycles
e. Less than diesel cycle
Q. In isochronous governors the speed drop is
a. 50 percent
b. 75 percent
c. 10 percent
d. 20 percent
e. Zero
Q. In a Diesel engine the duration between the time of injection and time of ignition is called
a. Explosion period
b. Delay period
c. Period of ignition
d. Pre-ignition period
e. Burning period
Q. All but one of the following possible steam generator test difficulties would cause the apparent performance to be poorer than it actually is. One item would make the performance look better than it really is. Identify the item
a. Steam flow meter reads low
b. Steam temperature gauge reads too high
c. HHV of fuel is determined incorrectly, being too high
d. Coad scales are inaccurate, reading high
e. None of the above
Q. Resilience is the property of materials in which
a. Materials resist deformation
b. Materials spring back or recoil when pressure is removed
c. Materials are easily deformed
d. Materials can be easily pressed
e. None of the above
Q. Thermie
a. Is quantity of heat required to raise temperature of one tonne of water from 14.5?C to 15.5?C
b. Is a unit of latent heat measurement
c. Is thermal conductivity of materials
d. Is a unit of temperature measurement
e. Is the temperature change in water when 1000 calories of heat are added to 1 gm of water, gradually
Q. Induced draft fan for a boiler is always located
a. Near the cooling tower
b. At the foot of the chimney
c. Near the coal hopper
d. Near the water treatment
e. On the top of the chimney
Q. Intercooling in multistage compressors is done
a. To supply-air at two different pressures for use
b. To cool air during compression
c. To cool the air at delivery
d. To enable use of small cylinders and eliminate problems of unbalanced forces
e. To minimise the work of compression
Q. Which of the following is an important consideration in the design of turbine blades?
a. Creep
b. Shape
c. Exhaust temperature
d. Air-fuel ratio
e. None of the above
Q. Sensible heat is
a. That heat which causes change of state
b. That heat which produces a rise of temperature
c. That heat which produces a rise of temperature
d. That can only be sensed by a thermometer
e. None of the above
Q. The effieincy of a diesel cycle increases with
a. increase in cut off
b. decrease in cut off
c. decrease in compression ratio
d. None of the above
e. Carbon dioxide
Q. In a throttle governed steam engine
a. Admission pressure is reduced while cut off remains unaltered
b. Admission pressure remains constant while cut off is altered
c. Admission pressure and cut off both are altered
d. Admission pressure is varied while cut off remains unaltered
e. Neither admission pressure nor cut off is altered
Q. For gas turbines compressors used are
a. Centrifugal type
b. Lobe type
c. Axial flow type
d. Sliding vane type
e. Reciprocating type