Question 383Motor Plants - Assistant Engineer70% to pass
Air scavenging of the cylinder shown in the illustration begins between figures_______________. Illustration MO-0025
AI Explanation
The correct answer is B) 3 and 4.
The air scavenging of the cylinder shown in the illustration begins between figures 3 and 4. This is because the piston is moving downwards in figure 3, drawing in a fresh air charge, and then in figure 4 the piston is moving upwards, expelling the exhaust gases and allowing fresh air to enter the cylinder.
The other answer choices are incorrect because:
A) Air scavenging does not begin between figures 2 and 3, as the piston is still moving downwards in figure 2.
C) Air scavenging does not begin between figures 4 and 5, as the piston is already in the upward stroke in figure 4.
D) Air scavenging does not begin between figures 5 and 6, as the piston is already in the downward stroke in figure 5.
Related Questions
#381 The power consumed during the scavenging process of a diesel engine is known as the_______________. #382 During the valve overlap period, the exhaust pressure of a turbocharged, four-stroke cycle diesel engine must be less than the intake manifold pressure to ensure_______________. #384 Large, two-stroke cycle, main propulsion, diesel engine cylinders can be successfully pressure charged during normal operation, by using the _______________. #385 Which of the turbocharging methods listed directs the exhaust gases to the turbine at fairly uniform velocity and pressure? #386 Which of the turbocharging systems listed operates with the least average back pressure in the exhaust manifold?