101. The basic characteristics of a brake fluid is
a high boiling point
low viscosity
compatibility with rubber and metal parts
all of these
✅ The correct answer is option D.
Automobile Engineering MCQs
102. The crescent-shaped cavity on the piston head top surface is called as
piston oil hole
snap ring
valve recess
valve clearance
✅ The correct answer is option C.
103. The function of a proportioning control valve (PCV) in a brake system is to
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.
104. When a gear box has four forward speeds and one reverse speed, it is said to be a
3-speed gear box
4-speed gear box
5-speed gear box
6-speed gear box
✅ The correct answer is option B.
105. For the same maximum pressure and temperature
Diesel cycle is more efficient than Otto cycle
Otto cycle is more efficient than Diesel cycle
both Otto cycle and Diesel cycle are equally efficient
none of the above
✅ The correct answer is option A.
106. The most accurate ignition system of a spark ignition engine is
magneto system
battery system
electronic control unit system
magneto and electronic
✅ The correct answer is option C.
107. The self ignition temperature of Diesel as compared to petrol is
higher
lower
same
depends on fuel qualit
✅ The correct answer is option B.
108. The fuel pump of a programmed fuel injection (PFI) system operate for two seconds when the ignition is turned to the start position to
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.
109. The advantage of having a tandem master cylinder arrangement in automobiles is that it
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.
110. Which one of the following statements correctly describes the construction of a planetary gear type differential ?
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.