Technician A says that diesel engines do not create a vacuum in their intake manifold. Technician B says most diesel engines use hydraulically assisted power brake boosters, and the pressure for the assist is developed in the power steering pump on some diesel engines. Who is correct?
A)A only
B)B only
C)Both A and B
D)Neither A nor B

Question

Quizplus · Accepted Answer

Diesel engines do not create a vacuum in their intake manifold because they do not have a throttle plate that restricts air flow like gasoline engines do. Most diesel engines indeed use alternative methods for power brake assistance, such as hydraulically assisted systems where the pressure can be developed by the power steering pump, making both Technician A and Technician B correct.

Technician a Says That Diesel Engines Do Not Create a Vacuum