Mechanic – Agriculture Development and Farmers Welfare
PROVISIONAL ANSWER KEY
Question Paper Code: 3/2023/OL
Category Code: 545/2019
Exam: Mechanic
Date of Test 06-01-2023
Department Agriculture Development and Farmers Welfare
Alphacode A
Question1:-What is the working cycle of compression ignition engine?
A:-Otto Cycle
B:-Sterling Cycle
C:-Diesel Cycle
D:-Rankin Cycle
Correct Answer:- Option-C
Question2:-The portion below the piston pin boss is called
A:-Crown of the Piston
B:-Skirt of the Piston
C:-Land of the Piston
D:-Ring Section of the Piston
Correct Answer:- Option-B
Question3:-In a rear wheel drive vehicle if the rear wheels move up and down then
A:-the angle of drive changes
B:-the drive line changes length
C:-both (1) and (2)
D:-neither (1) nor (2)
Correct Answer:- Option-C
Question4:-Which part is not common between the old model Petrol and Diesel engines?
A:-Air cleaner
B:-Battery
C:-Exhaust Silencer
D:-Fuel injector
Correct Answer:- Option-D
Question5:-Which sensor is used to sense vibrations?
A:-Engine Knocking Sensor
B:-Air Vertex Sensor
C:-Hall Effect Sensor
D:-Vehicle Speed Sensor
Correct Answer:- Option-A
Question6:-A clutch is usually designed to transmit maximum torque which is
A:-Equal to the maximum engine torque
B:-150 percentage of the maximum engine torque
C:-75 percentage of the maximum engine torque
D:-None of the above
Correct Answer:- Option-B
Question7:-Which type of gear will not produce axial thrust while transmitting torque
A:-Spur gear
B:-Helical gear
C:-Worm gear
D:-Spur bevel gear
Correct Answer:- Option-A
Question8:-Clutch facings are usually attached to the plate by
A:-Steel Rivets
B:-Steel screws
C:-Aluminium screws
D:-Brass rivets
Correct Answer:- Option-D
Question9:-What will be cause by which noise comes from a gearbox in neutral position?
A:-Synchronizing unit stuck
B:-Synchronizer worn-out
C:-Bearing worn out or dry
D:-Defective gear shift mechanism
Correct Answer:- Option-C
Question10:-What is the load taken by a taper roller bearing?
A:-Radial Load
B:-Axial and Radial Load
C:-Thrust Load
D:-Non thrust Load
Correct Answer:- Option-B
Question11:-The efficiency of hydraulic braking system is
A:-40-50%
B:-50-60%
C:-60-70%
D:-About 90%
Correct Answer:- Option-D
Question12:-If proportioning valve is not working
A:-Front brakes may lock
B:-Rear brakes may lock
C:-Front brakes may drag
D:-Rear brakes may drag
Correct Answer:- Option-A
Question13:-What is the main cause for wear on one side of tyre?
A:-Over inflation
B:-Under inflation
C:-Improper camber
D:-Improper caster
Correct Answer:- Option-C
Question14:-Disc brakes self-adjust when the lining wear allows the piston to
A:-Contact the disc
B:-Slide outward through the seal
C:-Cause seal deflection
D:-Reposition the seal groove in the caliper
Correct Answer:- Option-B
Question15:-What causes ”Air suction” in pump of hydraulic power steering system?
A:-Noise
B:-Low pressure
C:-High fluid level
D:-Steering wheel play
Correct Answer:- Option-A
Question16:-What is the compression ratio of an engine, its clearance volume is 10 c.c. and swept volume is 90 c.c?
A:-8 : 1
B:-9 : 1
C:-10 : 1
D:-11 : 1
Correct Answer:- Option-C
Question17:-In a six cylinder engine, the power impulse occurs after ‘x’ degrees of crank shaft rotation. Where ‘x’ is
A:-360
B:-240
C:-120
D:-90
Correct Answer:- Option-C
Question18:-In a Diesel fuel injection pump, the effective pressure strokes of the plungers are regulated by means of a
A:-Fuel pump
B:-Control rack
C:-Needle valve
D:-Cam shaft
Correct Answer:- Option-B
Question19:-A dish in the piston head is employed to
A:-Decrease piston weight
B:-Provide valve clearance
C:-Adjust piston displacement
D:-Control compression ratio
Correct Answer:- Option-D
Question20:-Which tool is used for removing the piston rings from a piston?
A:-Piston ring expander
B:-Piston ring compressor
C:-Piston ring lifter
D:-Piston ring squeezer
Correct Answer:- Option-A
Question21:-Valve overlap is the number of degrees of crankshaft rotation during which
A:-the values are moving from fully closed to the timing point
B:-both intake and exhaust valves are closed
C:-both intake and exhaust valves are open
D:-the valve float
Correct Answer:- Option-C
Question22:-What is the effect if thermostat valve is stuck in closed position?
A:-Engine gets over cooling
B:-Engine gets over heating
C:-Engine does not start
D:-Engine does not stop
Correct Answer:- Option-B
Question23:-What is the reason if oil pump does not suck the oil?
A:-Filter clogged
B:-Relief valve struck
C:-More backlash
D:-Less radial clearance
Correct Answer:- Option-C
Question24:-Percentage of fuel energy lost to the cylinder walls in an automobile engine is approximately
A:-1 percent
B:-10 percent
C:-80 percent
D:-25 percent
Correct Answer:- Option-D
Question25:-The impeller type exhauster has
A:-One spindle
B:-Two spindle
C:-Three spindle
D:-No spindle
Correct Answer:- Option-A
Question26:-Which are the materials commonly used in the catalytic converter?
A:-Chromium and vanadium
B:-Zinc and molybdenum
C:-Asbestos and ceramics
D:-Palladium and platinum
Correct Answer:- Option-D
Question27:-The basic difference between the supercharger and the turbocharger is in
A:-the way they are driven
B:-the size of the unit
C:-the number of waste gates
D:-the pressure they produce
Correct Answer:- Option-A
Question28:-The fuel injection timing in a distributor type pump is controlled by
A:-changing plunger stroke
B:-changing speed of rotor
C:-rotating the cam ring
D:-changing the number of cams on the ring
Correct Answer:- Option-C
Question29:-Which action the spindle only move up and down in feed pump?
A:-Idling action
B:- Partial action
C:-Normal action
D:-Pumping action
Correct Answer:- Option-A
Question30:-The information provided by the Oxygen sensor to the feed back control system is about the
A:-Air flow speed
B:-Air temperature
C:-Exhaust gas volume
D:-Air fuel ratio
Correct Answer:- Option-D
Question31:-What is the cause for tractor pulls to one side during normal driving?
A:-Wheels tracking
B:-Loose wheel bearing
C:-Friction in ball joint
D:-Uneven tyre pressure
Correct Answer:- Option-D
Question32:-Which type of synchromesh gearbox will produce torque more than three times of other type?
A:-Multi and double cone
B:-Porsche type
C:-Baulk type
D:-Baulk ring type
Correct Answer:- Option-A
Question33:-Which is the manually operated seed drill?
A:-Cell wheel precision seeder
B:-Centrifugal seed drill
C:-Pneumatic seed drill
D:-Hand seed drill
Correct Answer:- Option-D
Question34:-In tractor bull gear is the component of
A:-Engine timing gear
B:-Gear box
C:-PTO
D:-Final drive
Correct Answer:- Option-D
Question35:-In tractors, the function of three-point linkage is to
A:-Balance the load
B:-Hitch the implement
C:-Lift the load
D:-Carry the load
Correct Answer:- Option-B
Question36:-In tractor ‘ram cylinder’ is the
A:-Brake cylinder
B:-Fluid cylinder
C:-Hydraulic cylinder
D:-PTO
Correct Answer:- Option-C
Question37:-As per ASAE standard, the diameter of the PTO shaft is
A:-34.9 cm with 6 splines
B:-3.49 cm with 6 splines
C:-34.9 cm with 21 splines
D:-3.49 cm with 4 splines
Correct Answer:- Option-B
Question38:-Which type of gear will produce clicking noise during teeth contact?
A:-Spur gear
B:-Worm gear
C:-Helical gear
D:-Bevel gear
Correct Answer:- Option-A
Question39:-What causes noisy gear box in neural position?
A:-Synchroniser worn out
B:-Bearing worn out or dry
C:-Synchronising unit struck
D:-Synchronizer defective
Correct Answer:- Option-B
Question40:-What is aspect ratio in the tyre structure?
A:-Percentage ratio of tyre height to rim width
B:-Ratio between tyre height to tyre diameter
C:-Percentage ratio of tyre height to tyre width
D:-Ratio between tyre width to rim width
Correct Answer:- Option-C
Question41:-Which part of tyre referred as crown?
A:-Thread radius
B:-Thread width
C:-Tyre width
D:-Rim width
Correct Answer:- Option-A
Question42:-What causes air suction in pump of hydraulic power steering system?
A:-High fluid level
B:-Low pressure
C:-Steering wheel ply
D:-Noise
Correct Answer:- Option-D
Question43:-What is the material constituent of semi-metallic brake lining?
A:-Aluminium oxide
B:-Carbon composite
C:-Carbon fibre
D:-Fine polished steel wool
Correct Answer:- Option-D
Question44:-What is the cause of low voltage output from alternator?
A:-Faulty regulator
B:-Worn out bearing
C:-Loose drive pulley
D:-Loose mounting
Correct Answer:- Option-A
Question45:-In power tiller which type of tilling method is used to wet-soft paddy field?
A:-Circular travel tilling method
B:-Continuous tilling method
C:-Alternate tilling method
D:-Return tilling method
Correct Answer:- Option-C
Question46:-Which ploughing method saves fuel and time?
A:-Gathering method
B:-Casting method
C:-Hiching method
D:-Mixed method
Correct Answer:- Option-D
Question47:-What is the purpose of cultivator?
A:-Deep cultivation
B:-Tilling the soil between row crops
C:-Primary tillage operation
D:-Secondary tillage operation
Correct Answer:- Option-B
Question48:-What is the use of harrows?
A:-After seed bed preparation
B:-Deep cultivation
C:-Penetrating hard ground
D:-Seed bed preparation before planting
Correct Answer:- Option-D
Question49:-Which type of agriculture implement used for incorporating straw and green manure in the field?
A:-Subsoiler
B:-Cultivator
C:-Rotavator
D:-Harrow
Correct Answer:- Option-C
Question50:-What is the cause for abnormal clutch lining wear?
A:-Excessive pedal free play
B:-Dry release bearing
C:-Warped pressure plate
D:-Oil in the clutch lining
Correct Answer:- Option-C
Question51:-While using the calipers along with steel rules, the accuracy is limited to ____________ mm.
A:-0.05
B:-0.25
C:-0.5
D:-1
Correct Answer:- Option-C
Question52:-The _________ punch is used for marking witness marks.
A:-30°
B:-45°
C:-60°
D:-90°
Correct Answer:- Option-C
Question53:-Which type of V-block are used for supporting long shafts parallel on machine tables or marking off tables?
A:-Single bevel single groove ‘V’
B:-Single bevel double groove ‘V’
C:-Unmatched pair ‘V’ groove
D:-Matched pair ‘V’ block
Correct Answer:- Option-D
Question54:-A 50 mm long (normal size) ‘V’ block capable of clamping workpiece between 5 to 40 mm in diameter and of Grade ‘A’ will be designated as
A:-‘V’ block 5 – 40 A/50 – IS. 2949
B:-A 5 – 40/50, ‘V’ block – IS. 2949
C:-50/5 – 40 A, IS. 2949 – ‘V’ block
D:-IS. 2949 – A 5 – 50/50- ‘V’ block
Correct Answer:- Option-A
Question55:-The ____________ of a combination set is used to set work pieces on the machines and measure the depth of slots.
A:-Protractor head
B:-Centre head
C:-Square head
D:-Circular head
Correct Answer:- Option-C
Question56:-The sizes of a Phillips screw drivers are specified by point size
A:-1, 2, 3 and 4
B:-1.25, 2.25, 3.25 and 4.5
C:-1.5, 2.5, 3.5 and 5
D:-2, 4, 6 and 8
Correct Answer:- Option-A
Question57:-The peen of a hammer is used for
A:-shaping and forming only
B:-shaping, riveting and forming only
C:-forming, shaping and bevelling only
D:-forming, shaping, bending and riveting
Correct Answer:- Option-D
Question58:-The size of a Tinman’s ‘L’ square is specified by the
A:-length of the body and the tongue
B:-length of the body and width of the tongue
C:-Width of the body and the tonque
D:-Width of the body and the length of the tongue
Correct Answer:- Option-A
Question59:-The graduation of a bevel protractor is marked from
A:-0 to 90°
B:-0 to 180°
C:-0 to 270°
D:-0 to 360°
Correct Answer:- Option-B
Question60:-The basic units of M.K.S. system are
A:-Centimetre, Gram and Second
B:-Meter, Kilogram and Second
C:-Kilometer, Kilogram, and Hour
D:-Millimeter, Milligram and Minute
Correct Answer:- Option-B
Question61:-Files are generally made up of
A:-High carbon or high grade cast steel
B:-Low carbon or low grade cast steel
C:-Medium carbon or medium grade cast steel
D:-Low carbon steel or Mild steel
Correct Answer:- Option-A
Question62:-Which type of files is available only in half round shape?
A:-Single cut file
B:-Double cut file
C:-Curved cut file
D:-Rasp cut file
Correct Answer:- Option-D
Question63:-____________ is the distance a drill advanced into the work in none complete rotation.
A:-Cutting speed
B:-RPM
C:-Peripheral speed
D:-Feed
Correct Answer:- Option-D
Question64:-Hand taps for a particular thread are available as a set consisting of ___________ pieces.
A:-Two
B:-Three
C:-Four
D:-Five
Correct Answer:- Option-B
Question65:-The Indian Standard establishes
A:-Four sets of feeler gauges Nos. 1, 2, 3 and 4
B:-Three set of feeler gauges Nos. 1, 2 and 3
C:-Two sets of feeler gauges Nos. 1 and 2
D:-Only one feeler gauge No. 1
Correct Answer:- Option-A
Question66:-In an outside micrometer, ___________ ensures an uniform pressure between the measuring surfaces.
A:-Sleeve
B:-Thimble
C:-Ratchet stop
D:-Spindle lock but
Correct Answer:- Option-C
Question67:-The least count of a vernier caliper is __________ mm.
A:-0.01
B:-0.02
C:-0.05
D:-0.1
Correct Answer:- Option-B
Question68:-Concentricity and eccentricity can be checked by a vernier height gauge with the aid of a
A:-Dial indicator
B:-Steel rule
C:-Bevel protractor
D:-Caliper
Correct Answer:- Option-A
Question69:-The act of joining slip gauges together while building up to sizes is known as
A:-Joining
B:-Wringing
C:-Binding
D:-Adhering
Correct Answer:- Option-B
Question70:-Sine bar is a
A:-Round bar made of High speed steel
B:-Round bar made of Nickel steel
C:-Rectangular bar made of stabilized chromium steel
D:-Rectangular bar made of high grade tungsten steel
Correct Answer:- Option-C
Question71:-Which type of washer is used with flat or oval type head screws?
A:-Lock washer
B:-Internal type washer
C:-External type washer
D:-Countersunk type washer
Correct Answer:- Option-D
Question72:-The type of belt fastener used on heavy duty machines is
A:-Jackson type
B:-Lagrelle type
C:-Wire type
D:-Crescent plate type
Correct Answer:- Option-B
Question73:-The radial distance between the pitch circle and the root circle of a spur gear is known as
A:-Land
B:-Addendum
C:-Dedendum
D:-Working depth
Correct Answer:- Option-C
Question74:-Which type of clutch can be operated through a cable from a distance?
A:-Electromagnetic multiple disc clutch
B:-Dog clutch
C:-Single plate clutch
D:-Centrifugal clutch
Correct Answer:- Option-A
Question75:-Which one of the given formula is used to calculate the length of rivet (L’ mm) when forming a flat head? (Given : T – total thickness in mm of the piled plates and ‘d’ – Rivet diameter in mm)
A:-T – d (0.6 ˜ 1.4)
B:-T + d (0.6 ˜ 1.4)
C:-T – d (0.8 ˜ 1.2)
D:-T + d (0.8 ˜ 1.2)
Correct Answer:- Option-D
Question76:-The furnace used to manufacture pig iron is
A:-Crucible furnace
B:-Blast furnace
C:-Cupola furnace
D:-Pudding furnace
Correct Answer:- Option-B
Question77:-The percentage of carbon contains in mild steel is
A:-0.5-0.8
B:-0.15-0.3
C:-0.4-0.6
D:-More than 1
Correct Answer:- Option-B
Question78:-The purpose of normalizing is to
A:-Remove the induced stresses
B:-Improve machineability
C:-Soften the steel
D:-Improve ductility and toughness
Correct Answer:- Option-D
Question79:-To reduce internal stresses of a hardened tool, the method of heat treatment generally applied is
A:-Stabilizing
B:-Annealing
C:-Normalizing
D:-Tempering
Correct Answer:- Option-B
Question80:-Heat treatment of metal is necessary
A:-To produce certain desired properties
B:-To make good appearance of compound
C:-To increase strength of the metal
D:-To make the metal rust proof
Correct Answer:- Option-A
Question81:-Which marking media is applied on rough forgings and castings?
A:-White wash
B:-Prussian blue
C:-Copper sulphate
D:-Cellulose lacquer
Correct Answer:- Option-A
Question82:-Fullers are used for
A:-Necking and grooving
B:-Forging the head of rivets, bolts, etc.
C:-making shoulders with right angles
D:-Upsetting
Correct Answer:- Option-A
Question83:-Which property can be increased in copper by cold forging?
A:-Ductility
B:-Malleability
C:-Tensile stress
D:-Elasticity
Correct Answer:- Option-C
Question84:-Which one of the following is the function of the tuyers in the forge?
A:-Permits cooled air
B:-Controls smokes and sparks
C:-Act as an outlet of products of combustion
D:-To clean the forge
Correct Answer:- Option-C
Question85:-The process of decreasing the length of the job in forging
A:-Drawing out
B:-Jumping
C:-Punching
D:-Drifting
Correct Answer:- Option-B
Question86:-What is the purpose of groover in sheetmetal?
A:-Releasing of seam
B:-Compress the seam
C:-Closing and locking the seam
D:-Stress relieving during seaming
Correct Answer:- Option-C
Question87:-What is the maximum cutting capacity of straight snips?
A:-20 SWG
B:-19 SWG
C:-18 SWG
D:-16 SWG
Correct Answer:- Option-A
Question88:-Which rivet is most suitable for riveting soft materials like leather, plastics etc?
A:-Snap head rivet
B:-Conical head rivet
C:-Counter sunk rivet
D:-Bifurcated rivet
Correct Answer:- Option-D
Question89:-Caulking is an operation of
A:-pressing the whole surface of the edge of the plate
B:-closing down the edges of the plates and heads of the rivet
C:-closing down the center surface of the plate
D:-pressing the plates
Correct Answer:- Option-B
Question90:-The formula generally used in the shop floor, length of snap head rivet is
A:-L = T + d (1.3 – 1.6)
B:-L = T + 1.5 D
C:-L = T + d
D:-L = T × D
Correct Answer:- Option-B
Question91:-Electrode size refers
A:-diameter of its core wire
B:-diameter of electrode
C:-length of the electrode
D:-thickness of flux coating
Correct Answer:- Option-A
Question92:-Arc blow is caused by
A:-electronic disturbance
B:-magnetic disturbance
C:-electric disturbance
D:-radio disturbance
Correct Answer:- Option-B
Question93:-The welding machine which is used to convert AC Welding Supply to DC Welding Supply
A:-engine generator set
B:-motor generator set
C:-transformer set
D:-rectifier set
Correct Answer:- Option-D
Question94:-Name the flame which contains more acetylene and less oxygen
A:-Oxidizing flame
B:-Neutral flame
C:-Carburizing flame
D:-Common flame
Correct Answer:- Option-C
Question95:-When the electrode is connected to the positive terminal and work piece to the negative terminal of power source, then that is
A:-Straight polarity
B:-Reverse polarity
C:-AC polarity
D:-DC polarity
Correct Answer:- Option-B
Question96:-Threads are cut on a lathe with a single point tool by
A:-setting the correct speed
B:-setting on cut for the full depth of thread
C:-making a series of cuts in the same cut
D:-moving the carriage by means of rack
Correct Answer:- Option-C
Question97:-Which one of the following governs the selection of feed when turning a work?
A:-Tool geometry
B:-Surface finish required
C:-Type of coolant required
D:-Chip formation
Correct Answer:- Option-B
Question98:-Which one of the reason for torn threads while thread cutting on lathe?
A:-Blunt tool
B:-Insufficient side clearance
C:-Heavy depth of cut
D:-Cutting tool geometry
Correct Answer:- Option-C
Question99:-The lead screw of a lathe have a thread of
A:-BSW
B:-BSF
C:-ACME
D:-v-thread
Correct Answer:- Option-C
Question100:-The lathe is specified according to the
A:-horse power and chuck diameter
B:-tool post size
C:-the maximum length of work that can be turn between centres
D:-the size of drill that can be held on the lathe
Correct Answer:- Option-C
