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Automobile Engineering Worksheet Questions

Total questions: 76

Worksheet time: 38mins

Name
Class
Date
1.

Morse test is conducted on:

a)

single - cylinder engines

b)

multi - cylinder engines

c)

horizontal engines

d)

vertical engines

2.

Prony brake is used for testing of:

a)

small engines

b)

large engines

c)

engines having small flywheel

d)

high speed engines

3.

Clog point of an oil refer to:

a)

the point of maximum contamination of oil

b)

the level of impurities beyond which oil ceases to flow

c)

the temperature at which oil solidifies

d)

the temperature at which paraffin and waxes in oil start precipitating

4.

Otto cycle consists of:

a)

two isentropic and two constant volumes processes

b)

two isentropic and two constant pressure processes

c)

two adiabatic and two isothermal processes

d)

two isothermal and two constant volume processes

5.

Diesel cycle consist of:

a)

isentropic, isothermal, constant volume constant pressure processes

b)

two constant volume, one constant pressure, one isothermal process

c)

two isentropic, one constant volume and one constant pressure processes

d)

two constant pressure, one constant volume, and one isentropic processes

6.

Which is not correct for calculating air stand efficiency?

a)

all processes are reversible

b)

specific heat remains unchanged at temperature

c)

no account of the mechanism of heat transfer considered

d)

gases dissociate at higher temperatures

7.

The king pin inclination is generally:

a)

less than 0.5º

b)

between 1º and 2º

c)

between 2º and 5º

d)

more than 9º

8.

For balancing single cylinder engine a counter weight is added to:

a)

piston

b)

piston pin

c)

cam

d)

crank

9.

By supercharging:

a)

power stroke becomes stronger

b)

loss in exhaust gets reduced

c)

engine can be made to run smoother

d)

thermal efficiency of the engine can be improved

10.

Speedometer drive is generally taken from:

a)

dynamo

b)

flywheel

c)

fan belt

d)

front wheel

11.

Odometer is:

a)

an instrument that indicates the condition of battery

b)

an instrument used for measurement of consumption

c)

an instrument used for BHP measurement

d)

an instrument used for distance measurement

12.

Automobile radiator is filled with:

a)

acidic water

b)

alkaline water

c)

hard water

d)

soft water

13.

The ignition coil acts as:

a)

a capacitor

b)

an inductor

c)

an RC circuit

d)

a step up transformer

14.

The self starting motor for automobile is a:

a)

universal motor

b)

DC shunt motor

c)

DC series motor

d)

synchronous motor

15.

Starting motor current may be about

a)

0.15 A

b)

0.5 A

c)

5.1 A

d)

25 A

16.

As a rule before the piston are remove, it is essential to remove the:

a)

gudgeon pin

b)

circlip

c)

piston rings

d)

crank shaft

17.

Common causes for excessive oil consumption include:

a)

heavy oil and light bearings

b)

high speed and worn engine

c)

short trips and cold weather

d)

frequent oil changes

18.

The device that is used to measure the clearance between the valve and tappet of an internal combustion engine is measured by using:

a)

snap gauge

b)

slip gauge

c)

feeler gauge

d)

micrometer

19.

Which of the following instrument is used measuring specific gravity?

a)

thermometer

b)

hygrometer

c)

anemometer

d)

hydrometer

20.

Exhaust gas leakage into the cooling system is likely to occur because of defective:

a)

cylinder head gasket

b)

manifold gasket

c)

water pump

d)

any of the above

21.

Clutch slippage while clutch is engaged is specially noticeable________________.

a)

during idling

b)

at low speed

c)

during acceleration

d)

during braking

22.

To engage securely and prevent dragging the clearance between release bearing and release collar in a clutch is generally:

a)

2 – 3 mm

b)

10 – 12 mm

c)

20 – 22 mm

d)

30 – 32 mm

23.

Gudgeon pins are made of:

a)

same material as that of piston

b)

cast iron

c)

hardened and ground steel

d)

none of these

24.

Latex is:

a)

a plastic

b)

a cover on writes carrying current to spark plugs

c)

a variety of lubricant

d)

a milky juice of rubber

25.

Cross wires on grooves on tires

a)

decrease the danger of skidding

b)

absorb shocks because of road unevenness

c)

provide good traction

d)

provide better load carrying capacity

26.

The diesel fuel pump is designed to supply fuel

a)

just sufficient against the demand of the injector pump

b)

in excess quantity than needed by the injector pump

c)

a constant quantity at all engine speeds

d)

in sufficient quantity in accordance with the engine speed

27.

The fuel injected into the cylinder in diesel engine when the piston is:

a)

exactly at B.D.C. after compression stroke

b)

exactly T.D.C. before compression stroke

c)

approaching T.D.C. during compression stroke

d)

approaching B.D.C. during exhaust stroke

28.

Dirt or gum in fuel nozzle or jets can produce:

a)

excessive fuel consumption

b)

lack of engine power

c)

smoky black exhaust

d)

white exhaust

29.

Oil pan is attached:

a)

to the bottom of the cylinder block

b)

in a separate away from the crank case

c)

at the top of the cylinder block

d)

any of the above

30.

Excess oil consumption in engine may be because of:

a)

leakage of oil through oil pan gasket

b)

poor quality or improper viscosity of engine oil

c)

excessive oil pressure

d)

any of the above

31.

Wheel base of the vehicle is:

a)

distance between front and rear axis

b)

distance between the front tires

c)

extreme length of the vehicles

d)

width of tires

32.

The percentage of heat released from fuel mixture, in an internal combustion engine which converted into useful work is roughly:

a)

10 percent

b)

10 – 20 percent

c)

20 – 25 percent

d)

40 – 45 percent

33.

The efficiency of hydraulic braking system is:

a)

about 90 percent

b)

60 – 80 percent

c)

50 – 60 percent

d)

40 – 50 percent

34.

When not in use, the self discharge of an automobile battery in dry weather is generally:

a)

0.5 to 1%

b)

3 to 5%

c)

5 to 7.5%

d)

not more than 10%

35.

A laminated glass on cracking:

a)

bursts into sharp edged fragments

b)

bursts into granular pieces

c)

sand witched layer taps the fragments

d)

breaks into the farm of crystals

36.

Wax is applied on car body as:

a)

it is water repellent

b)

it seals off the pores

c)

the surface shines

d)

any of the above

37.

A spark voltage requires a voltage of:

a)

112 V

b)

124 V

c)

220 V

d)

440 V

38.

The minimum cranking speed in petrol engine is:

a)

same as the normal operating speed

b)

half of operating speed

c)

one fourth of operating speed

d)

60 - 80 rpm

39.

Which oil is more viscous?

a)

SAE 30

b)

SAE 50

c)

SAE 80

d)

SAE 40

40.

Engine oil is generally changed after:

a)

100 km

b)

1500 km

c)

1100 km

d)

2500 - 6000 km

41.

The most probable cause for uneven wear of tires for truck is:

a)

low the pressure

b)

excessive camber

c)

tires overloaded

d)

any of the above

42.

In a vehicle the most probable cause for hard steering may be:

a)

low tire pressure

b)

bent wheel spindle

c)

tie rod ends tight

d)

any of the above

43.

Poor compression in a two stroke engine cannot be because of:

a)

leaky valves

b)

broken piston rings

c)

leaking cylinder head gasket

d)

poor fits between pistons, rings and cylinder

44.

The number of exhaust manifolds in a V – 8 engine is:

a)

one

b)

four

c)

there is no exhaust manifold

d)

two

45.

The device for smoothing out the power impulses from the engine is known as:

a)

clutch

b)

fly wheel

c)

gear box

d)

differential

46.

The firing order in case of four cylinder in the engines is generally_______________

a)

1 – 2 – 4 – 3

b)

1 – 3 – 4 – 2

c)

1 – 4 – 3 – 2

d)

either B or C

47.

In case of four cylinder opposed cylinder engines, firing order is

a)

1 – 4 – 3 – 2

b)

1 – 3 – 4 – 2

c)

1 – 2 – 3 – 4

d)

1 – 2 – 4 – 3

48.

In a four stroke engine, for the combustion of one of fuel, the volume of air needed would approximately

a)

1 cu. m

b)

2 cu. m

c)

5 – 7 cu. m

d)

9 – 10 cu. m

49.

Theoretically air needed for the combustion of one kg of fuel is:

a)

100 kg

b)

14.5 kg

c)

16.7 kg

d)

27.4 kg

50.

Which of the following is the cause of loss power?

a)

poor compression

b)

restricted exhaust

c)

clogging of air cleaner

d)

low injection pressure

51.

A valve in the carburettor of a internal combustion engines which regulates the proportion of air gasoline vapors entering the cylinder.

a)

gate valve

b)

choke valve

c)

check valve

d)

globe valve

52.

What device combines air and fuel for burning in cylinder?

a)

intercooler

b)

regenerator

c)

fuel injection

d)

carburettor

53.

A passive restraint device consisting of bags in front of the driver and passenger.

a)

air buoy

b)

air bag

c)

air balloon

d)

air duct

54.

The heat exchanger used in an Ericson cycle is:

a)

regenerator

b)

combustion chamber

c)

intercooler

d)

recuperator

55.

In Stirling engine, the heat is added during

a)

isothermal processes

b)

isometric processes

c)

isobaric processes

d)

isentropic processes

56.

In an Otto engine, the heat is added during

a)

isothermal processes

b)

isometric processes

c)

isobaric processes

d)

isentropic processes

57.

Exhaust stroke gasoline engine is also known as

a)

supercharging

b)

choking

c)

scavenging

d)

knockling

58.

The mechanical efficiency of a device is the ratio of the

a)

mechanical energy input to the mechanical energy output of the device

b)

ideal energy input to the actual energy input

c)

actual energy extracted to the ideal energy extracted

d)

actual to the ideal energy input

59.

The smallest subdivision of an element that can take place in a chemical reaction is a/an

a)

atom

b)

molecule

c)

electron

d)

proton

60.

The smallest subdivision of a compound that can take in a natural state is a/an

a)

atom

b)

molecule

c)

electron

d)

proton

61.

Elements with different atomic weights but the same atomic number are:

a)

isomers

b)

isotropes

c)

isotopes

d)

isobars

62.

All of the following are characteristics of metals except:

a)

high electrical conductivities

b)

tendency to form positive ions

c)

tendency to form brittle solids

d)

high melting points

63.

The following are all characteristics of non-metals except

a)

having little or no luster

b)

appearing o the right end of the periodic table

c)

having low ductility

d)

being reducing agents

64.

Graduations in the properties of elements from one elements to the next are less pronounced in:

a)

the lanthanide series

b)

periods

c)

groups

d)

active metals

65.

All of the following are components of a chemical element except:

a)

protons

b)

neutrons

c)

electrons

d)

ions

66.

Which of the following is not a prefix used in naming isomers?

a)

Para

b)

Meta

c)

Cis

d)

Bi

67.

All of the following are types of chemical bonds except:

a)

ionic bonds

b)

covalent bonds

c)

metallic bonds

d)

nuclear bonds

68.

The equilibrium distance between elements in ionic bonds is function of all the following except:

a)

ionic change

b)

coordination number

c)

atomic weight

d)

temperature

69.

Which of the following statements is not characteristic of ionic compounds?

a)

they are usually hard, brittle, crystalline solids

b)

they have high melting points

c)

they are non volatile and have low vapor pressures

d)

they are good electrical conductors in the solid phase

70.

What kind of bonding do common gases that exists a free state as diatomic molecules experience?

a)

ionic bonds

b)

covalent bonds

c)

metallic bonds

d)

nuclear bonds

71.

Measure the diffuser’s ability to increase the pressure of the fluid is:

a)

speed recovery factor

b)

pressure recovery factor

c)

volume recovery factor

d)

diffuser recovery factor

72.

A decrease in stagnation pressure will decrease the mass flux through the:

a)

diverging nozzle

b)

converging nozzle

c)

converging – diverging nozzle

d)

none of these

73.

What is the main power generating plant that produces the most electricity per unit thermal energy in the fuel input and has the greatest surplus of electricity for most co generation system?

a)

steam engine

b)

steam turbine

c)

gas turbine

d)

diesel engine

74.

Air standard efficiency of a diesel engine depends on:

a)

speed

b)

compression ratio

c)

fuel

d)

torque

75.

What is meant by brake horse power?

a)

power developed in the engine cylinder

b)

final horse power delivered to the equipment

c)

actual horse power delivered to the engine drive shaft

d)

work required to raise a weight of 33,000 lbs at a height of one foot in one minute of time

76.

Average pressure on a surface when a changing pressure condition exist

a)

back pressure

b)

partial pressure

c)

pressure drop

d)

mean effective pressure

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