Basic Automobile Engineering Quiz | Practice Test #mcq.CETJOB

Multiple Choice Questions on Automobile | Objective Questions | Automobile Engineering Quiz | MCQ

1 >>When the front wheels of a vehicle are locked during braking, then?

(A) stopping distance becomes extremely long
(B) front tyres skid across the road surface and the vehicle spins around
(C) rear tyres skid across the road surface and the vehicle spins around
(D) driver loses control over the steering, and the vehicle continues moving in its current direction

2 >>The order in which effort applied to the steering wheel is transferred to the front wheel is ?

(A) steering wheel - steering gearbox - steering shaft - tie rod - steering knuckle - front wheels
(B) steering wheel - steering shaft - steering gearbox - tie rod - steering kunckle -front wheels
(C) steering wheel - steering shaft - steering gearbox - steering knuckle - tie rod - front wheels
(D) steering wheel - tie rod - steering gearbox - steering shaft - steering knuckle - front wheels

3 >>The best fuels for compression ignition engines are ?

(A) straight chain paraffins
(B) aromatics
(C) branched chain paraffins
(D) napthalenes

4 >>An oil filter bypass valve opens when the ?

(A) engine is cold
(B) engine overheats
(C) oil filter becomes clogged
(D) engine runs at high speed

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5 >>Damper is also known as ?

(A) shock absorber
(B) torsion bar
(C) spring
(D) radius rod

6 >>The main characteristics of a maintenance-free (MF) battery is that ?

(A) a maintenance-free battery requires little maintenance during normal use and it is sufficient to add water instead of an electrolyte containing sulphuric acid
(B) a maintenance-free battery has a relatively short shelf life when compared with standard batteries
(C) since it is sealed, the water in a maintenance-free battery is not lost through evaporation thus accordingly it is not necessary to top up the cells with water
(D) recharging of a maintenance-free battery is neither required nor possible

7 >>The most accurate ignition system of a spark ignition engine is ?

(A) magneto system
(B) battery system
(C) electronic control unit system
(D) magneto and electronic system

8 >>The main function of a resonator is that it ?

(A) regulates the intake air flow rate
(B) reduces the intake air noise .
(C) enhances intake efficiency
(D) regulates the intake air temperature

9 >>For the same maximum pressure and temperature ?

(A) Diesel cycle is more efficient than Otto cycle
(B) Otto cycle is more efficient than Diesel cycle
(C) both Otto cycle and Diesel cycle are equally efficient
(D) none of the above

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

(A) enable the pump's fault-diagnosis function to operate
(B) warm up and lubricate the pump
(C) supply a large amount of fuel and thereby create a choke effect
(D) pressurise the fuel system before the engine is started

11 >>In which of the following conditions, the idle CO percentage should be measured with the vehicle? ?

(A) Headlights and other electrical devices are switched off.
(B) Headlights and other electrical devices are switched on.
(C) Headlights and other lights are switched off.
(D) Headlights are switched on.

12 >>The mechanical efficiency (?m) of an I.C. engine is equal to (where I.P. = Indicated power, B.P. = Brake power and F.P. = Frictional power) ?

(A) I.P/B.P.
(B) B.P/I.P.
(C) B.P/F.P
(D) F.P./B.P.

13 >>The lower cylindrical portion of the piston which improves piston cooling performance is called ?

(A) piston crown
(B) connecting rod
(C) piston pin boss
(D) piston skirt

14 >>The most effective method of controlling S.I. engine exhaust emission is by ?

(A) recirculating exhaust
(B) using catalytic converter
(C) using some additives in the fuel
(D) none of these

15 >>The power actually developed inside the engine cylinder is called as ?

(A) indicated power
(B) brake power
(C) frictional power
(D) none of these

16 >>If clearance volume of I.C. engines is increased, the compression ratio will ?

(A) increase
(B) decrease
(C) remain constant
(D) be doubled

17 >>The basic function of the suspension is to ?

(A) absorb vibration and impact forces from the road surface
(B) ensure that the steering wheel can deliver a suitable amount of steering force
(C) ensure that wheel alignment is not disturbed during driving
(D) automatically correct the effects of over steering

18 >>Damper in an automobile is used to ?