WORK ASSISTANT - NCA - KSRTC.pdf (Size: 1.4 MB / Downloads: 0)
1.The engine runs in a dosed garage can be dangerous because :
(A)The exhaust gas contains carbon monoxide
(B)The exhaust gas contains carbon dioxide
(C )The exhaust gas contains water vapour
(D)The exhaust gas may catch fire

2.Which of the following should not be done by a good mechanic?
(A)Put sharp edged tools in the pocket
(B)Wipe excess oil and grease off the hands and tools
(C )Always keep the workshop floor dean
(D)Wear safety goggles while grinding

3.‘Which of the following is not used in fire extinguishers?
(A)Foam
(B)Dry chemicals
(C )Solution of sodium bicarbonate and sulphuric add
(D)Carbon monoxide

4.The least count of universal vernier caliper is :
(A) 0.1 mm(B)0.01 mm
(C ) 0.02 mm(D)0.2 mm

5.Which of the following is used for securing a tightened nut in position?
(A) Key(B)Cotter pinCotter pin
(C ) Snap ring(D)GasketGasket

6.Which file has minimum space between their teeth?
(A) Rough files(B)Smooth files
(C ) Coarse files(D)Bastard files.
7.The cross-sectional shape of an alien key is : 
(A) Square(B)PentagonPentagon
(C ) Hexagon(D)OctagonOctagon

8. Which of the following is not a precision measuring instrument?
(A) Outside micrometer(B)Dial indicator
(C ) Vernier height gauge(D)Universal surface gaugeUniversal surface gauge

9.A round rod which does not have a head, and has external threads at both ends is called:
(A) Stud-(B)Bolt
(C ) Nut(D)ScrewScrew

10.Snips are used for:
(A) Cutting away thick layer of metal(B)Cutting sheet metalCutting sheet metal
(C ) Cutting wooden blocks(D)Cutting external threadsCutting external threads

11.The ratio of work output of an engine to the fuel energy burnt is called :
(A) Mechanical efficiency(B)Volumetric efficiencyVolumetric efficiency
(C ) Thermal efficiency(D)Compression ratioCompression ratio

12.The power available at the engine’s flywheel is called :
(A) Indicated horse power(B)Brake horse power
(C ) Frictional horse power(D)Overall efficiency

13.Opening and closing of the valves in relation to the position of piston and flywheel is called
(A) Valve lead(B)Value lagValve lag
(C ) Valve overlap(D)Value timingValve timing

14.The type of piston pin generally used in heavy duty diesel engine is:
(A) Fully floating piston pin(B)Semi floating piston pinSemi floating piston pin
(C ) Set screw type piston pin(D)Three-quarter type piston pinThree-quarter type piston pin

15.“Scuffing" occurs when :
(A)Piston slides against cylinder without lubrication
(B)Piston clearance is excessive
(C )Piston rings are worn out
(D)Cylinder liner is worn out

16. When the piston is at BDC, volume of the cylinder above the piston is?
(A)Clearance volume(B) Swept volume
(C ) Total volume(D) Compression ratio

17.The number of main journals on a six-cylinder engine’s crankshaft will be :
(A) Either 4 or 6(B)Either 5 or 7
(C ) Either 6 or 8(D)Either 6 or 12

18.In a diesel engine, the fuel gets ignited by :'
(A) Fuel injector. (B)Electric sparkElectric spark
(C ) Heater plug(D)Heat of compressed air

19.Force x Distance ?
(A) Power(B)TorqueTorque
(C ) Work(D)Energy •

20.Which process gives the engine cylinder a cross hatch pattern?
(A) Drilling(B)BoringBoring
(C ) Facing(D)HoningHoning

21.Which of the following cannot be a reason for engine overheating?
(A) Worn out thrust bearing(B)Lack of coolantLack of coolant
(C ) Thermostat valve stuck closed(D)Late ignition timingLate ignition timing

22.If you notice the presence of engine oil inside the radiator filler neck, the reason can be
(A) Defective radiator pressure cap(B)Damaged cylinder head gasketDamaged cylinder head gasket
(C ) Defective thermostat valve(D)Defective oil pumpDefective oil pump

23.While reverse flushing a radiator, the flushing gun is connected to the :
(A) Upper tank(B)Lower tank
(C ) Water pump inlet(D)Thermostat housing

24.Excessive engine oil consumption can be happened if:
(A)Viscosity of the oil is excessive
(B)Oil passages in the engine is blocked
(C )Piston rings are worn out
(D)Pressure relief valve is stuck closed

25.The force which retards the motion of one body, in contact with another body is called :
(A)Friction(B) Adhesion
(C ) Cohesion(D) Torsion

26.The positive crankcase ventilation system helps :
(A)To redirect the blow by gases in the crankcase to inlet manifold
(B)To reduce the atmospheric pollution caused by the engines
(C )To prevent oil dilution and sludge formation
(D)All of the above

27.Which of the following is not a function of fuel injection system in the diesel engines?
(A)To atomise the fuel
(B)To supply the fuel into the cylinder in metered quantity
(C )To prepare air-fuel mixture in the inlet manifold for combustion
(D)To pressurise the fuel so that it can enter into the compressed air in the cylinder

28.When the helix and spill port of an inline type FIP comes to coincide, what will happen?
(A)Suction of fuel into the barrel(B)Medium fuel deliveryMedium fuel delivery
(C )Maximum fuel deliveryMaximum fuel delivery(D)No fuel deliveryNo fuel delivery

29.In an automobile, the solenoid switch is apart of:
(A)Starting system(B)Ignition systemIgnition system
(C )Charging systemCharging system(D)Lighting systemLighting system

30. Spark plug ‘reach' means :
(A)The heat range of the spark plug
(B)The length of central electrode
(C )The length of the threaded portion of the spark plug shell
(D)The gap between the spark plug terminals

31.The longitudinal distance between the centres of the front and rear axles is called :
(A)Turning radius(B)Axle ratio
(C )Wheel track(D)Wheel base

32.The metal used for body building of automobiles is generally:
(A)Cast iron(B)Steel
(C )Copper(D)Aluminium

33.The chassis frame of vehicles is narrow at the front, because :
(A)It gives smaller turning radius to the vehicle
(B)Number of tyres is less at the front
(C )Weight of the vehicle is less at the front
(D)It helps to reduce the weight of the frame

34.The type of car in which the driver’s cabin is separated from the rear compartment by using a window is called:
(A)Sedan(B)Coupe
(C )Limousine(D)Station wagon

35.The ‘immobiliser’ is :
(A)A mobile phone charging device used in cars
(B)An electronic security device for vehicles 
(C ) An automatic tyre changing equipment.
(D)A trailer attached to the carriage vehicles

36.Seat belts used in cars are generally :
(A)Two point type(B)Three point type
(C )Four pointtype(D)Five point type

37.The crumple zone is :
(A)A garage, where the unserviceable vehicles are kept
(B)The space inside the luggage compartment of the vehicle
(C )The area which cannot be seen by the driver
(D)The part of the vehicle, designed to absorb the energy' during a collision

38.The term ‘Gross Vehicle Weight’ indicates :
(A)The maximum operating weight of a vehicle without trailer
(B)Weight of the vehicle without passengers
(C )Weight of the vehicle when its body is removed 
(D) Weight of the passengers a vehicle can carry

39.“ABS" stands for :
(A)Auxilary Brake System
(B)Antiroll Brake System
(C )Antilock Brake System •
(D)All wheel Brake System

40.When the child lock is ON?
(A)The door can be opened from inside
(B)The door cannot be opened from outside
(C )All the doors will be closed automatically
(D)The door cannot be opened from inside

41.In tubeless tyres ;
(A)Air is filled in a tube inside the tyre
(B)Air is filled in between rim and the tyre
(C )No air is required
(D)Liquid is filled in place of air

42.Tyre rotation is carried out for:
(A)Reconditioning of a damaged tyre
(B)Equalising the wear of all the tyres in a vehicle
(C )Free movement of the tyres
(D)Removing impurities from the tyre

43.Tread Wear Indicator is located:
(A)On the tyre, where the tread meets the side wall
(B)On the dashboard of the vehicle
(C )At the wheel alignment shops
(D)On the front bumper of the vehicle

44.In a tyre of‘9.00-20- 12PR' size, “20" indicates that:
(A)Tyre width is 20 inches(B)Tyre pressure is 20 kg/cm2
(C )Rim diameter is 20 inches(D)Maximum speed limit is 200 kmph

45.The leaf springs arc supported on the axles by means of:
(A)V-belt(B)Spring retainer
(C )Helper springs(D)U-bolt

46.The ‘Ackerman mechanism' is related to:
(A)Air-conditioning system(B)Transmission system
(C )Steering system(D)Lubrication system

47.In heavy vehicles, the gears of differential assembly arc lubricated with :
(A)SAE 40 oil(B)SAE 90 oil
(C )SAE 140 oil(D)Grease

48.Which of the following is not a part of differential assembly?
(A)Crown wheel(B)Sun gear
(C )Pinion(D)Universal joint

49. The air suspension system is commonly employed in :
(A) Heavy buses and trucks(B)Light commercial vehiclesLight commercial vehicles
(C ) Stationary engines(D)Motor cyclesMotor cycles

50.The electrolyte used in a lead-acid battery is: 
(A) Hydrochloric acid(B)Sulphuric acidSulphuric acid
(C ) Nitric acid(D)Lead PeroxideLead Peroxide

51.The facing of the clutch friction plate is made of: 
(A) Asbestos(B)Rubber
(C ) Steel(D)Cast iron

52.The clutch cover is bolted to the : 
(A) Pressure plate(B)Crankcase
(C ) Gearbox(D)FlywheelFlywheel

53.In a modern automobile gearbox, most of the gears are::
(A) Helical gears(B)Spur gears
(C ) Spiral bevel gears(D)Herringbone gearsHerringbone gears

54.In gear systems, as the speed decreases :
(A) Torque decreases(B)Torque increases
(C ) Torque remains the same(D)Torque comes to zeroTorque comes to zero

55.A transfer case is used in :
(A)All automobiles
(B)Vehicles with automatic transmission
(C )Four wheel drive vehicles
(D)Rear wheel drive vehicles

56.To stop a running vehicle :
(A)All the wheels require equal braking force
(B)All the wheels require different braking force.
(C )More braking force is required at the front wheels
(D)More braking force is required at the rear wheels

57. A tandemmaster cylinder has:
(A)One piston(B)Two pistonsTwo pistons
(C )Three pistons(D)No pistons

58.“R 134 a" is :
(A) A brake fluid(B)A coolant
(C ) A lubricant(D)A refrigerant

59.The parking brake employed in cars are usually operated :
(A) Mechanically(B)Hydraulically
(C ) Electrically(D)Pneumatically

60.In the air brake system, the valve which regulates the line air pressure
(A) Brake valve(B)Delivery valueDelivery valve
(C ) Thermostat valve(D)Unloader valueUnloader valve

61.Which one has negative temp co-efficient of resistance?
(A) Carbon(B)Copper
(C ) Aluminium(D)Iron

62.The electrical conductor used in battery is :
(A) Gas(B)Aluminium
(C ) Silver(D)WaterWater

63.SI unit of charge is:*
(A) Volt(B)ESU of charge
(C ) Farad(D)CoulombCoulomb

64.A battery is a source of:
(A) AC or DC Voltage(B)1Φ AC voltage
(C ) DC Voltage(D)3 Φ AC Voltage

65.Which one of the following instruments is used for measuring specific gravity of electrolyte? 
(A) Hydro meter •(B) Barometer
(C ) Volt meter(D) Lactometer

66.For silicon PN junction, the barrier potential is about:
(A)1.7 V(B)0.001 V
(C )0.07 V(D)0.7 V

67.What is the EMF of a fully charged lead acid cell?
(A)2 V(B)1.8 V
(C )2.1V(D)1.6 V

68.The total value of two resistance is 25 Ω when connected in series, and 6 Ω W connected in parallel. Find the value of two resistance :
(A)10O, 15 Ω(B)120, 130
(C )2oΩ ,5Ω(D)19Ω, 6Ω

69.The commercial unit of Electrical energy is :
(A)Ampere hour(B)Kilo watt hour
(C )Watt- hour(D)Joule Joule

70.How many number of positive and negative plates areplaced in a 9 plate lead acid cell?
(A)4 positive plate and 4 negative plate
(B)5 positive plate and 4 negative plate
(C )5 positive plate and 5 negative plate5 positive plate and 5 negative plate
(D)4 positive plate and 5 negative4 positive plate and 5 negative

71.A permanent magnet moving coil instrument will read :
(A)Only AC quantities(B)Both AC and DC quantities
(C )Only DC quantities  (D)Pulsating quantitiesPulsating quantities

72.What is the working principle of a two winding transformer?
(A)Self-induction(B)Mutual induction
(C )Principe of DC Motor(D)Lenz's law

73.Which part of the PMMC instrument produce eddy current damping?
(A)Moving coil(B)Aluminium former
(C )Permanent magnet(D)Soft iron cylindrical coreSoft iron cylindrical core

74.The process of adding impurities to a semiconductor is known as :
(A)SinteringSintering(B)Drifting
(C )DopingDoping(D)Intrusion

75.A four pole 1200 RPM alternator will generate emf ata frequency of:
(A)25 Hz(B)40 Hz
(C )50 Hz50 Hz(D)60 Hz60 Hz

76. The most suitable motor for electric traction is :
(A)DC shunt motor(B)DC compound motor
(C )DC Series motorDC Series motor(D)None of the aboveNone of the above

77. The quantity of scale on the dial of the Multimeter at the top most is :
(A)DC current(B)AC current
(C )AC voltageAC voltage(D)Resistance rangeResistance range

78. The dielectric strength of insulation is called :
(A)Barriers voltage(B)Breakdown down voltage
(C )Peak inverse voltage(D)Peak voltagePeak voltage

79.In the case of pure metallic conductors the resistance is :
(A)Inversely proportional to the sp: resistance
(B)Directly proportional to the cross sectional area 
(C ) Directly proportional to the length
(D)None of the above

80.When the disc of an energy meter is rotating even without connecting any Load the error is called?
(A)Creeping error(B)Phase errorPhase error
(C )Friction error(D)Parallax errorParallax error

81.The Indussite Kalibangan belongs to :
(A)Punjab(B)HaryanaHaryana
(C )GujaratGujarat(D)RajasthanRajasthan

82.The Chalcolithic Jorwe culture flourished between theage :
(A)1400 - 700 BC(B)1300-600 BC
(C )1800 - 2400 BC. (D)1600-700 BC

83. Tolkapiyam is a work on :
(A) State craft(B)AyurvedaAyurveda
(C ) Grammar(D)None of theseNone of these

84.Kautilya thought to be the chief minister of:
(A) Ashoka(B)Chandraguptha
(C ) Samudragupta(D)Rajendra Chola

85.Justice party was founded at:
(A) Calcutta(B)BombayBombay
(C ) Madras(D)None of theseNone of these

86.The Hindusthan Socialist Republican Army (HSRA) was founded at:
(A) Amritsar(B)Delhi
(C ) Lukhnow(D)ChandigarhChandigarh

87.The famous quit India resolution was passed by the AICC session held at:
(A) Lahore(B)Madras
(C ) Calcutta(D)BombayBombay

88.The Anamudi peak situated in :
(A) Kollam district(B)Pathanam Thitta district
(C ) Idukki district(D)Kottayam district

89.'Kerala - A portrait of the Malabar Coast* is written by
(A) George wood cock(B)Roll and E. Miller
(C ) Robin Jeoffrey(D)R.C. Brizton •

90.The ancient Kerala port named as Rajendra Chola Pattanam is:
(A) Barace(B)Vizhinjam
(C ) Calicut(D)Muzris

91.Chattampi Swamikal attained ‘Samadhi' at:
(A) Varkala(B)Sivagiri
(C ) Kannanmula(D)Panmana

92. The founder of Atmavidya Sangham was: 
(A) Vaikunta Swami
(C )Swami Vagbhatananda
(B) Kumara Guru (D) None of these

93. 'Al Islam', an Arabic - Malayalam monthly was published by :
(A) Makthi Thangal(B)K.M. Moulavi
(C ) Muhammad Abdul Rahiman(D)Vakkom Abdulkhadir Moulavi

94.Sadhu Jana Paripalana Yogam was founded in the year:
(A) 1907(B)1909
(C ) 1911(D)19181918

95.‘Nalagamam’ deals with:
(A) Astronomy(B)History
(C ) Medicine(D)GrammarGrammar

96.'Operation Sakti', the second Neuclear experiment of India, led by :
(A) Dr. K. Radha Krishnan(B)Dr. G. Madhavan Nair
(C ) Dr. A.P.J. Abdul Kalam(D)None of theseNone of these

97.'Wandering in many worlds’ is a book written by:
(A) Dr. Sasi Tharoor(B)Kuldip Nayyar
(C ) M.J. Akbar(D)Justice V.R. Krishna Ayer

98.The film P.K. is directed by:
(A) Amir Khan(B)Rajkumar Hirani
(C ) Sidharth Roy Kapur(D)Vinod Chupra

99.The first Chairman of Neethi Ayog:
(A) Aravind Panagariya(B)Montesingh Ahluwaliya
(C ) Arun Jaitley(D)Narendra Modi

100.Name the top wicket scorer in test cricket:
(A) Muralidharan(B)Kapil Dev
(C ) Anil Kumble(D)Wazim Akram