MOTOR MECHANIC/STORE ASSISTANT,GROUND WATER SOLVED PAPER 2015

MOTOR MECHANIC/STORE ASSISTANT,GROUND WATER

EXAM DATE:17-12-2015
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1.Splines and keys in mechanical assemblies:

A.Fasten studs into place

B.Lock nuts to bolts

C.Locks gears to shafts*

D.Used as set screws

Ans:C

2.Castle nuts are normally used with:

A.Snap rings

B.Cotter pins*

C.Bolt heads

D.Lock washers

Ans:B

3.Gaskets are used to:

A.Prevent any leakage of fluid*

B.Seals out pressure

C.Takes up space as shims

D.Any of the above

Ans:A

4.Taps are used to:

A.Cut internal threads*

B.Cut external threads

C.Enlarge a hole

D.Both(A) and (B)

Ans:A

5.A’Clutch spring compressor’ compresses------------of the clutch while dismantling.

A.Cushioning springs

B.Thrust springs*

C.Anti rattling springs

D.Torsional springs

Ans:B

6.As piston moves towards TDC in compression stroke:

A.The mixture gets hotter

B.Even distribution of mixture happens

C.Pressure rise occurs

D.All of the above*

Ans:D

7.The stroke in which both the valves are closed is:

A.Suction

B.Compression

C.Expansion

D.Both B and C*

Ans:D

8.To further smoothen out the flow of power engines have:

A.Counter weights

B.Fly wheels*

C.Crank pins

D.Crank webs

Ans:B

9.To convert the reciprocating motion to rotary motion the engines have:

A.Cam shaft and crank shaft

B.Pistons and connecting rods*

C.Connecting rods and Crank shaft

D.Cam shaft and rocker arms

Ans:B

10.How many times in minute the inlet valve of a four stroke engine working at 1000 RPM open and close?

A.500*

B.1000

C.1500

D.2000

Ans:A

11.Valve rotators are used for:

A.Rotating the valves on its own axis

B.Reducing the warping of valves

C.Even wear distribution of valves

D.All of the above*

Ans:D

12.VTEC stands for:

A.Variable valve Timing Electronic Cam shaft

B.Variable valve Timing and lift Electronic control*

C.Valve Timing Electrical Cam Shaft

D.None of the above

Ans:B

13.Most commonly used valve actuating mechanism in modern cars is:

A.T-head

B.I-head*

C.L-head

D.F-head

Ans:B

14.The carbon deposits on the cylinder head is removed with:

A.Scrapper brush*

B.Water Jet

C.Soap solution

D.Kerosene

Ans:A

15.In a single cylinder two stroke engine running at 2000 RPM the number of power strokes per minute is:

A.1000

B.4000

C.2000*

D.None

Ans:C

16.In an Otto cycle engine,the operation sequence is:

A.Compression,exhaust,power

B.Power,induction,exhaust

C.Compression,power,exhaust*

D.Compression,power induction

Ans:C

17.The factor for ignition in diesel engines is:

A.Pressure of injection

B.High compression ratio

C.Abundance of air

D.All of the above*

Ans:D

18.In a two stroke engine  at the time of spark occurs.

A.Transfer port has just opened

B.Fresh gas is being compressed

C.Fresh charge is being transferred to inlet*

D.Any of the above

Ans:C

19.Which of the following is a rich air fuel ratio?

A.9:1*

B.11:1

C.13:1

D.15:1

Ans:A

20.The percentage of combustion heat,available at crank shaft for useful work output is:

A.35%

B.55%

C.60%

D.20%*

Ans:D

21.In an engine having swirl combustion chamber

A.More air fuel mixture enters

B.Improved scavenging take place

C.Improved combustion take place*

D.Burned gas has no back pressure

Ans:C

22.The main purpose of piston pin offset is to:

A.Perfectly balance the piston during power stroke

B.Prevent piston slip

C.Centralise the piston

D.Reduce piston slap*

Ans:D

23.Some automobile engines have glow plugs to:

A.Warn the driver about engine overheat

B.Preheat the fuel for easier starting

C.Preheat the combustion chamber*

D.Warm the passenger area

Ans:C

24.The upper and lower ends of the combustion chamber is formed by:

A.Piston and cylinder block

B.Cylinder walls and piston

C.Piston rings and cylinder head

D.Cylinder head and piston*

AnsD

25.Piston rings are provided to:

A.Completely seal the combustion gas

B.Hold the piston concentric to cylinder walls

C.Hold a fine oil film on cylinder walls

D.Both a and c*

Ans:D

26.Thermostat valve helps the engine to:

A.Keep the oil temperature at operating values

B.Keep the coolant temperature at operating values

C.Prevents the engine from overheating

D.Both b and C*

Ans:D

27.In a four stroke engine the cam shaft turns at:

A.Same speed as the crank shaft

B.Double the speed as the crank shaft

C.Half the speed of the crank shaft*

D.One fourth the speed of the crank shaft

Ans:C

28.Mechanic X says that all OHC engines have rocker arms.Mechanic Y says that some bucket tappets and no rocker arms.Who is correct?

A.Mechanic X

B.Mechanic Y*

C.Both X and Y

D.Neither X nor Y

Ans:B

29.Valve overlap occurs at:

A.The end of exhaust stroke*

B.The beginning of power stroke

C.The beginning of compression stroke

D.The end of power stroke

Ans:A

30.The rate at which work is done,is measured in terms of:

A.Energy

B.Torque

C.Inertia

D.Power*

Ans:D

31.The volume of air contained above the piston when the piston is at TDC is:

A.Clearance volume*

B.CC

C.Swept volume

D.Stroke volume

Ans:A

32.The condition of exploding the end charge before the completion of normal combustion is:

A.Pre-ignition

B.Rumble

C.Detonation*

D.Stalling

Ans:C

33.Low Cetane fuel implies that:

A.It takes longer time to ignite*

B.It takes lesser time to ignite

C.Ignites as soon as it enters the cylinder

D.Both B and C

Ans:A

34.Mechanical fuel pumps are operated by:

A.Cam in the cam shaft

B.Eccentric in the crank shaft

C.Skew gear in the cam shaft

D.Eccentric in the cam shaft*

Ans:D

35.Taper needle jet is found in:
A.Selex carburettor

B.SU carburettor*

C.Zenith carburettor

D.Carter carburetor

Ans:B

36.Generally turbo charger is operated by:

A.A belt driven by the engine crank shaft

B.A gear attached  to the cam shaft

C.A chain and sprocket drive

D.Exhaust gas*

Ans:D

37.Qualitative governing is best suited for:

A.High speed engines

B.Slow speed engines

C.Diesel engines*

D.Petrol engines

Ans:C

38.Growler is associated with:

A.Battery

B.Armature*

C.CB point

D.FIP

Ans:B

39.High compression ratio result in:

A.Increased NOx emission

B.More soot in exhaust

C.Reduced HC and CO emission

D.All of the above*

Ans:D

40.PCV valve is located between:

A.Crank case and inlet manifold*

B.Crank case and carburetor

C.Air cleaner and crank case

D.Air cleaner and carburetor

Ans:A

41.CO in the exhaust of a vehicle should not be more than:

A.0.5%*

B.1%

C.1.5%

D.2%

Ans:A

42.The temperature below which the oil will not flow is:

A.Fire point

B.Flash point

C.Pour point*

D.Flow point

Ans:C

43.Transfer case is a type off-------in four wheel drive vehicles

A.Crank case

B.Gear box*

C.Transmission shaft

D.Differential

Ans:B

44.Gear Clash while shifting is due to:

A.Incorrect clutch adjustment

B.Damaged synchronizer unit*

C.Low level gear oil

D.Any of the above

Ans:B

45.In case of front engine rear wheel drive cars the drive shaft has:

A.Minimum one universal joint

B.Maximum two universal joint
C.Minimum two universal joint*

D.Two slip joints

Ans:C

46.A slip joint permits changes in:

A.Wheel base

B.Wheel track

C.Wheel alignment

D.None*

Ans:D

47.Alternator produces electricity in its:

A.Stator windings*

B.Rotor field windings

C.Commutator

D.Regulator

Ans:A

48.While trying to start an engine it cranks slowly but doesn’t start.It may be due to:

A.Low temperature

B.Run down battery*

C.Damaged fuel system

D.Any of the above

Ans:B

49.Approximate starter pinion-ring gear,gear ratio is:

A.5:1

B.15:1*

C.25:1

D.30:1

Ans:B

50.When it is needed to top up the lead acid battery frequently.it is due to:

A.Sulfation

B.Overloading

C.Overcharging*

D.Long standing period

Ans:C

51.Hydrometer is device used to check:

A.Voltage of a cell

B.Specific gravity of acid*

C.Voltage of a battery

D.Temperature of electrolyte

Ans:B

52.In hydraulic system Brake binding is due to:

A.Incorrect free pedal play adjustment

B.Blocked by pass port

C.Blocked air went in master cylinder

D.Any of the above*

Ans:D

53.Double de-clutching is associated with:

A.Constant mesh gear box*

B.Synchromesh gear box

C.Hydraulic clutch

D.Magnetic clutch

Ans:A

54.Gear clash during shifting may be  caused by any of the following  except:

A.Defective synchronizer

B.Incorrect pedal play

C.Too low idle speed*

D.Unadjusted shift mechanism

Ans:C

55.How many synchronizer units are there in a three speed transmission?

A.One

B.Two*

C.Three

D.Four

Ans:B

56.How many gears are there in the main shaft of a four speed transmission?

A.Six

B.Five

C.Four

D.Three*

Ans:D

57.Pick the odd one out:

A.Half shaft*

B.Clutch shaft
C.Main shaft

D.Lay shaft

Ans:A

58.A humming noise from the under body of a rear wheel drive vehicle  is due to:

A.Bend propeller shaft

B.Incorrect differential  meshing*

C.Faulty gear box

D.Binding brake

Ans:B

59.The type of font axle in which the king pin is usually fixed in the stub axle forging and ends turn in the forked end of the  axle beam is:

A.Lemoine

B.Inverted lemoine

C.Reversed Elliot

D.Elliot*

Ans:D

60.The tilt of the front wheels from vertical is called:

A.Caster

B.Camber*

C.King Pin inclination

D.Toe in

Ans:B

61.To reduce the vibration and  for stability of a vehicle:

A.Higher unsprung weight is desired

B.Suspension spring of high frequency  can be used

C.Lower unsprung weight is desired*

D.Lower body  weight is desired

Ans:C

62.Stroke length is equal to:

A.Double the crank throw*

B.Same as the crank throw

C.Half of crank throw

D.Three times the crank throw

Ans:A

63.Which is not true with respect to Disc Brakes?

A.Uniform wear

B.Easy to service

C.High initial cost

D.Concealed frictional surface*

Ans:D

64.Generally five wheel tyre rotation starts from which side wheel?

A.Front right

B.Front left

C.Rear left

D.Rear right*

Ans:D

65.Which of the following axle shaft has to take full load?

A.Three quarter floating

B.Full floating

C.Semi floating*

D.Both A and B

Ans:C

66.Aspect ratio of tyre is its:

A.Section width/Section height

B.Section height/Section width *

C.Total width/Total height

D.Rim diameter/tyre diameter

Ans:B

67.In a tyre it is designated as ‘P200/775 R 16’,What is the digit 200?

A.Section width*

B.Section height

C.Rim diameter

D.Aspect ratio

Ans:A

68.What is the symptom of atmospheric air enter the water cooling system of a multi cylinder diesel engine?

A.Overheating*

B.Coolant become greenish

C.Coolant become reddish

D.Coolant become viscous

Ans:A

69.What is the CC value of new TATA Nano Gen X Easy shift car?

A.424

B.524

C.624*

D.724

Ans:C

70.The type of body movement of a vehicle in which the vehicle turn on its own longitudinal axis is:

A.Pitching

B.Bouncing

C.Yawing

D.Rolling*

Ans:D

71.Which gear will not revolve when the vehicle is moving on straight path?

A.Pianetary gear*

B.Sun gear

C.Crown wheel

D.Pinion

Ans:A

72.The rear axle thrust acting on rear axle casing is transferred to frame by:

A.Panhard rods

B.Radius rods*

C.Tie rods

D.Torque tubes

Ans:B

73.Compared with spiral bevel gear,a hypoid gear has the advantage of:

A.Higher efficiency

B.Weaker bearings can be used

C.Higher or lower propeller shaft can be used

D.All of the above*

Ans:D

74.The pollutant that forms at higher combustion temperatures is:

A.CO

B.HC

C.NOx*

D.H2O

Ans:C

75.Variable steering gear ratio can be achieved in the case of:

A.Worm and sector

B.Worm and nut

C.Rack and pinion

D.Worm and Roller*

Ans:D

76.Before a mechanic get under a vehicle he should make sure that:

A.The tyres are inflated

B.He use a creeper

C.The jack handle is down

D.The vehicle is on safety stands*

Ans:D

77.In automobile servicing concept what is meant by’Tear down’?

A.Adjusting

B.Disassembling*

C.Reassembling

D.Machining

Ans:B

78.Which is most suitable to check spark plug gap?

A.Feeler gauges*

B.Micrometer

C.Wire gauges

D.Vernier caliper

Ans:A

79.The reading of a metric micrometer is in:

A.Centimetre*

B.Thousands of an inch

C.Thousands of millimeter

D.Metre

Ans:A

80.To measure the tapemess of a cylinder a ----------is used.

A.Dial indicator*

B.Vernier caliper

C.Depth gauge

D.Micrometer

Ans:A

81.Swarnajayanti,Gram Swarozgar Yojana was launched in:

A.1990

B.1999*

C.2003

D.2008

Ans:B

82.Ranajith Singh Gold cup is associated with:

A.Hockey*

B.Football

C.Cricket

D.Tennis

Ans:A

83.Who won the Nobel prize for literature in 2014?

A.Eric Betzig

B.Raul Mamedeo

C.Ellud Kipchage

D.Patrick Modiano*

Ans:D

84.The headquarters of Kerala Lalita Kala Academy is at:

A.Thrissur *

B.Kochi

C.Thiruvanathapuram

D.Kozhikode

Ans:A

85.The palace at Mattanchery was built by:

A.British

B.Dutch

C.Zamorins

D.Portuguese*

Ans:D

86.Whose birthday is celebrated as National Youth Day?

A.Bhagat Singh

B.B.R.Ambedkar

C.Swami Vivekananda*

D.Rajeev Gandhi

Ans:C

87.McMohan line is the demarcation line between India and:

A.China*

B.Pakistan

C.Nepal

D.Burma

Ans:A

88.The famous Ajanta-Ellora is situated in:

A.Madhya Pradesh

B.Rajasthan

C.Maharashtra*

D.Delhi

Ans:C

89.Name the newspaper founder by Vakkom Abdul Khadar Maulavi:

A.Swadeshabhimani*

B.Chandrika

C.Malayala Manorama

D.Deepika

Ans:A

90.’Odayilninnu’is a novel written by:

A.P.C.Kuttikrishnan

B.S.K.Pottekkad

C.O.V.Vijayan

D.Kesavadev*

Ans:D

91.Where did the Jallianwala Bagh Massacre occure?

A.Jalandhar

B.Delhi

C.Amritsar*

D.Ludhiana

Ans:C

92.Who was the first secretary of SNDP?

A.Sree Narayana Guru

B.Kumaranasan*

C.Dr.Palpu

D.C.Govindan

Ans:B

93.Who received the Dada Sahib Phalke award in 2013?

A.Syam Benegal

B.B.R.Chopra

C.Gulzar*

D.Gireesh Karnad

Ans:C

94.’Pracheena Malayalam’was written by:

A.Ezhutachan

B.Vaikunda Swamikal

C.Herman Gundert

D.Chattampi Swamikal*

Ans:D

95.Who appoints the chairman of UPSC?

A.The Prime Minister of India

B.The President of India*

C.The Chief Justice of India

D.The Speaker of Lok Sabha

Ans:B

96.Who was the first recipient of Ezhutachan Puraskaram?

A.Takazhi Sivasankara Pillai

B.O.N.V.Kurup

C.M.T.Vasudevan Nair

D.Sooranad Kunjan Pillai*

Ans:D

97.The last Asian games was held in:

A.South Korea*

B.China

C.North Korea

D.Japan

Ans:A

98.Name the organization founded by Pandit Karuppan:

A.Hindu Dharma Paripalana Sabha

B.Kalyana Dayani Sabha*

C.Yogakshema Sabha

D.Dharma Paripalana  Sabha

Ans:B

99.The first woman President of Indian National Congress:

A.Sarojini Naidu

B.Annie Besant*

C.Vijayalakshmi Pandit

D.Kasturba Gandhi

Ans:B

100.Who was the Prime Minister of India,When Panchaseel was adopted?

A.Lal Bahadur Shastri

B.Morarji Desai

C.Jawaharlal Nehru*

D.Indira Gandhi

Ans:C