Top 250+ Solved Internal Combustion Engines (I.C. Engines) MCQ Questions Answer
Q. The most accurate method of determining fp is by
a. Willan's line
b. Morse test
c. measurement of brake and indicated power
d. motoring test
Q. In the air box method of measuring air flow, the air box is provided to
a. have constant temperature
b. have constant flow
c. damp out the pulsations
d. provide constant velocity of flow
Q. The air box/swept volume ratio should be in the range for single-cylinder engines
a. 10- 100%
b. 200-300%
c. 500 600%
d. > 1000%
Q. The best method of measuring speed is by
a. mechanical tachometer
b. electrical tachometer
c. magnetic pickup
d. none of the above
Q. Non-dispersive infra-red analyzer is widely accepted instrument for measuring
a. NO
b. HC
c. CO
d. CO2
Q. Thermal efficiency varies
a. inversely as sfc
b. directly as sfc
c. as square as sfc
d. as root as sfc
Q. For N is the rpm, number of power strokes per minute in a four-stroke engine is
a. 2N
b. N/2
c. N
d. 4N
Q. If N is the rpm, number of power strokes per minute in a two-stroke engine is
a. N
b. 2N
c. N/2
d. 4N
Q. The spark timing and combustion rate should be such that
a. peak pressure occurs at TDC
b. one half of the total pressure occurs at TDC
c. ignition delay is reduced
d. none of the above
Q. Volumetric efficiency is a measure of
a. speed of the engine
b. power of the engine
c. breathing capacity of the engine
d. pressure rise in the cylinder
Q. Indicated power is directly proportional to
a. torque
b. air consumption
c. cylinder peak pressure
d. none of the above
Q. Turbocharger engines are those in which charge density is increased by
a. separate air compressors
b. compressors driven by exhaust gas turbine
c. cooling inlet air
d. none of the above