45 AUTOMOBILE ENGINEERING MCQ ANSWER KEY

45 AUTOMOBILE ENGINEERING MCQ'S ANSWER KEY

1) *What is the unit of brake power?
ANSWER:--  Kilo Watt.

2) On which the fluctuation of engine speed during a cycle depends upon?
ANSWER:-- Mass of flywheel. 

3) Firing order of a 6 cylinder in-line engine is usually.....
ANSWER:-- 1-5-3-6-2-4.

4)What is the value of 1 bar is equal to?
ANSWER:-- 100 kPa.

5) Which term called as the cross-sectional area of one cylinder of an engine multiplied by its stroke?
ANSWER:-- Swept Volume.

6) Maximum combustion pressure in a car petrol engine is about...
ANSWER:-- 6MPa.

7) Which engine is called a 'Square Engine '?
ANSWER:-- An engine having bore and stroke equal.

8) What do the terms T.D.C. & B.D.C. stand for..
ANSWER:-- T.D.C. = TOP Dead Centre.

B.D.C. = Bottom Dead Centre.

9) What is indicated power(I.P.)?
ANSWER:-- Power developed within the engine cylinders.

10) The calorific value of petrol is about..?
ANSWER:-- 42.7- 43.5 MJ/Kg.

11) The stroke of an engine is the..?
ANSWER:-- distance between T.D.C. and B.D.C.

12) The component that connects the steering rack to the knuckles is..?
ANSWER:-- Tie Rod.

13) The most commonly used power plant in automobile is..?
ANSWER:-- I.C. Engine. 

14) The temperature indicating instrument in vehicles indicates the temperature of...?
ANSWER:-- Jacket Cooling Water.

15) Petrol that detonates easily is called...?
ANSWER:-- Low Octane Petrol.

16) In a single dry plate clutch, torsional vibrations are absorbed by...?
ANSWER:-- Coil springs known as torsional springs. 

17) Two advantages of using helical gears rather than spur gears in a transmission system are...?
ANSWER:-- Noise level and strength.

18) The type of air cycle used in diesel engine is called...?
ANSWER:-- Diesel cycle.

19) The two-stroke engine has valve ports in the..?
ANSWER:-- Cylinder walls.

20) The type of friction generally present in an automotive engine is...?
ANSWER:-- Viscous Friction.

 21) One of the major causes of FHP in engine is...?
ANSWER:-- Piston-ring friction. 

22) The combustion process in a diesel engine is...?
ANSWER:-- Constant pressure process. 

23) In 'V' type engines the included angle between two banks of cylinder is...?
ANSWER:-- 900.

24) The motion of the cam is transferred to the valve through....?
 
ANSWER:-- Rocker Arms.
 
25) If the engine coolant leaks into the engine oil, then enine oil...?
 
ANSWER:-- Appears Milky.
 
26) What type of bearing is used for main bearings and connecting rod bearings?
 
ANSWER:-- Plain Bearings. 

27) what is the main function of intake manifold?

ANSWER:-- Distributes intake air equally to the cylinders.

28) In automobiles what G.V.W. refers to?

ANSWER:-- Gross Vehicle Weight.

29) In the air fuel mixtures ignites before the spark takes place at spark plug, the condition is called..?

ANSWER:-- pre-ignition.

30) The operation of removing trapped air from the hydraulic braking system is known as..?

ANSWER:-- bleeding.

31) Why aluminium alloy is used in cylinder blocks? 

ANSWER:-- It is lighter and have good heat dissipation characteristics. 

32) Which is most commonly used supplementary restraint system (SRS) component?

ANSWER:-- Airbag.

33) How much the valve overlap in four stroke petrol engines is approximately?

ANSWER:-- 30 degree.

34) What is the octane rating of petrol commercially available?

ANSWER:-- 85-95.

35) Which type of friction generally present in an automotive engine?

ANSWER:-- Viscous friction.

36) The metering rod is designed to vary the size of which jets?

ANSWER:-- High speed jets. 

37) What is the size of intake valve?

ANSWER:-- Larger than that of the exhaust valve.

38) What is the function of anti-lock braking system (ABS)?

ANSWER:-- Maintains directional control during braking by preventing the wheels from locking.

39) Where is the seat belt tensioners are built in?

ANSWER:-- Seat belt retractors.

40) What is the function of alternator in an automobile?

ANSWER:-- Continually recharges the battery.

41) Which device smoothens the power impulses from the engine?

ANSWER:-- Flywheel.

42) What is the main cause of cahnge in engine oil viscosity?

ANSWER:-- Temperature. 

43) What uses torque converter to convert torque?

ANSWER:-- Automatic Transmission Fluid (ATF).

44) What measures Tachometer in a vehicle?

ANSWER:-- Engine r.p.m.

45) The engine oil viscosity is defined by..?

ANSWER:-- Society of Automotive Engineers (SAE).