Mechanical Engineering MCQs

A. High heat value
B. Low heat value
C. Net calorific value
D. Middle heat value

A. 4 – 6 kg/cm2 and 200 – 250°c
B. 6 – 12 kg/cm2 and 250 – 350°c
C. 12 – 20 kg/cm2 and 350 – 450°c
D. 20 – 30 kg/cm2 and 450 – 500°c

A. 500- 1000°c
B. 1000- 1500°c
C. 1500-2000°c
D. 2000-2500°c

A. 5-10 kg/cm2
B. 20-25 kg/cm2
C. 60-80 kg/cm2
D. 90-130 kg/cm2

A. First a mild explosion followed by a bi explosion
B. First a big explosion followed by a mil explosion
C. Both mild and big explosions occi simultaneously
D. Never occurs

A. 0.15 kg
B. 0.2 kg
C. 0.25 kg
D. 0.3kg

A. 180°
B. 125°
C. 235°
D. 200°

A. exhaust will be smoky
B. piston rings would stick into piston grooves
C. exhaust temperature will be high
D. engine starts overheating

A. Increase
B. Decrease
C. Remain same
D. Increase upto certain limit and then decrease

A. Otto cycle is more efficient than the diesel
B. Diesel cycle is more efficient’than otto
C. Both otto and diesel cycles are, equally efficient
D. Compression ratio has nothing to do with efficiency