Automobile Engineering MCQs

The fuel pump of a programmed fuel injection (PFI) system operate for two seconds when the ignition is turned to the start position to

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enable the pump’s fault-diagnosis function to operate
warm up and lubricate the pump
supply a large amount of fuel and thereby create a choke effect
pressurise the fuel sy
✅ The correct answer is option D.

The advantage of having a tandem master cylinder arrangement in automobiles is that it

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enhances safety by serving two independent lines in a divided-line brake circuit
enhances safety by activating the brakes using vacuum pressure in the event of brake fluid loss
supplies equal fluid pressure to each line of a divided-line brake circuit, thereby preventing the brakes from dragging on one side
boosts the brake fluid
✅ The correct answer is option A.

Which one of the following statements correctly describes the construction of a planetary gear type differential ?

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The six planetary pinions rotate in constant mesh with the internal gears.
One drive shaft is splined to the central gear and the other to the planetary gear.
Each planetary pinion gear meshes with both the central gear and the internal gear.
The internal gear is f
✅ The correct answer is option B.

The function of a proportioning control valve (PCV) in a brake system is to

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ensure that equal pressure is supplied to the front and rear brakes throughout every braking operation
reduce the brake fluid pressure when the brakes approach their lockup point
cause less brake fluid pressure to act on the front brakes than on the rear brakes when the fluid pressure exceeds a predetermined level
cause less brake fluid
✅ The correct answer is option D.