MDE 5 Q5

1 / 3

Question: In scroll type fuel injection pumps, how is the delivered quantity of fuel varied?

C) By modifying the position of the scroll or cam mechanism

A) By adjusting the rotational speed of the pump

B) By changing the angle of the delivery valve

D) By altering the temperature of the fuel

2 / 3

Question: In scroll type fuel injection pumps, how is fuel oil prevented from spraying out if the high-pressure pipe fails in service?

D) By utilizing a design that allows fuel to bypass the high-pressure pipe

B) By employing a safety valve that closes off the fuel supply

C) By incorporating a shut-off valve in the pump assembly

A) By using a pressure relief valve to divert excess fuel

3 / 3

Question: What is the purpose of the delivery valve in scroll type fuel injection pumps?

D) To filter contaminants from the fuel before it reaches the injector

B) To control the timing of the fuel injection

A) To regulate the fuel pressure before it enters the pump

C) To prevent backflow of fuel from the high-pressure side to the low-pressure side

Your score is