Question 433Motor Plants - Assistant Engineer70% to pass
Decreasing the exhaust valve clearance of a diesel engine will cause the exhaust valve to open_______________.
AI Explanation
The correct answer is B) earlier and remain open longer.
Decreasing the exhaust valve clearance of a diesel engine causes the exhaust valve to open earlier in the engine cycle. This is because the reduced clearance allows the valve to open sooner, as the cam lobe can push the valve open with less piston movement. Additionally, the reduced clearance means the valve will remain open for a longer duration, as it takes longer for the valve spring to close the valve against the reduced clearance.
The other options are incorrect because: A) the valve would open earlier but not necessarily remain open longer, C) the valve would open later and have greater lift, and D) the valve would open later and have less duration, which is the opposite of the correct answer.
Related Questions
#431 When the timing gear backlash for a Roots-type blower has become excessive, the problem is properly repaired by_______________. #432 When inspecting the valve mechanism shown in the illustration, normal maintenance would include_______________. Illustration MO-0074 #434 Which of the following statements would apply when checking the valve clearance of the unit shown in the illustration? Illustration MO-0074 #435 In an auxiliary diesel engine, one reason for knurling the piston skirt is to _______________.#436 The service life of a worn aluminum piston for an auxiliary diesel, for which no spares are readily available, can be extended by_______________.