Lakshya Education MCQs

Question: In a typical medium speed 4-stroke cycle diesel engine the inlet valve
Options:
A. Opens at 20° before top dead center and closes at 35° after the bottom dead center
B. Opens at top dead center and closes at bottom dead center
C. Opens at 10° after top dead center and closes 20° before the bottom dead center
D. May open or close anywhere
Answer: Option A
Explanation :

Submit Answer & Explaination

Earn Reward Points by submitting Detailed Explaination for this Question

More Questions on This Topic :

Question 1. In a typical medium speed 4-stroke cycle diesel engine the inlet valve
  1.     Opens at 20° before top dead center and closes at 35° after the bottom dead center
  2.     Opens at top dead center and closes at bottom dead center
  3.     Opens at 10° after top dead center and closes 20° before the bottom dead center
  4.     May open or close anywhere
Answer: Option A
Explanation :
Question 2. Pick up the wrong statement
  1.     2-stroke engine can run in any direction
  2.     In 4-stroke engine, a power stroke is obtained in 4-strokes
  3.     Thermal efficiency of 4-stroke engine is more due to positive scavenging
  4.     Petrol engines occupy more space than diesel engines for same power output
Answer: Option D
Explanation :
Question 3. The brake power is the power available
  1.     In the engine cylinder
  2.     At the crank shaft
  3.     At the crank pin
  4.     None of these
Answer: Option B
Explanation :
Question 4. The brake power is the power available
  1.     In the engine cylinder
  2.     At the crank shaft
  3.     At the crank pin
  4.     None of these
Answer: Option B
Explanation :
Question 5. Which one of the following engines will have heavier flywheel than the remaining ones?
  1.     30 kW four-stroke petrol engine running at 1500 r.p.m.
  2.     30 kW two-stroke petrol engine running at 1500 r.p.m.
  3.     30 kW two-stroke diesel engine running at 750 r.p.m.
  4.     30 kW four-stroke diesel engine running at 750 r.p.m.
Answer: Option A
Explanation :
Question 6. The specific fuel consumption of a petrol engine compared to diesel engine of same h.p. is
  1.     Same
  2.     More
  3.     Less
  4.     Less or more depending on operating conditions
Answer: Option B
Explanation :

Check all Questions in this Topic : Click HERE