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15 October 2023

[Solved Paper]Junior Instructor Mechanical Agricultural Machinery

 [Solved Paper]Junior Instructor Mechanical Agricultural Machinery

FINAL ANSWER KEY of Junior Instructor Mechanical Agricultural Machinery 506/2022

Question Paper Code: 154/2023/OL

Category Code: 506/2022

Exam: Junior Instructor Mechanical Agricultural Machinery (SR for ST only)

Date of Test 30-09-2023

Department Industrial Training

Question1:-Fire extinguisher can be used with fire on electrical equipment.

        A:-Halon extinguishers

        B:-Foam extinguishers

        C:-Dry powder extinguishers

        D:-Water-filled extinguishers

        Correct Answer:- Option-A

Question2:-In which class of fire includes "Fire on electrical equipment?

        A:-Class A fire

        B:-Class B fire

        C:-Class C fire

        D:-Class D fire

        Correct Answer:- Option-D

Question3:-In ABC of first aid, 'B' stands for





        Correct Answer:- Option-D

Question4:-Choose the correct statement regarding ECOs.

        A:-'Avoiding careless waste' belongs to minor ECOs

        B:-'To stopping of leakage points' included in major ECOs

        C:-'Replacement of existing household appliances by new energy efficient

ones' included in Minor ECOs

        D:-'Replacement or major renovation of old buildings' included in Medium


        Correct Answer:- Option-A

Question5:-Which one of the following is NOT a marking material?

        A:-Copper sulphate

        B:-Lead sulphate

        C:-Cellulose Lacquer

        D:-Prussian blue

        Correct Answer:- Option-B

Question6:-Reading accuracy of engineer's steel rule.

        A:-0.5 mm

        B:-0.1 mm

        C:-0.05 mm

        D:-1 mm

        Correct Answer:- Option-A

Question7:-Choose the correct statement regarding clearance angle of chisel.

        A:-Angle between cutting edges of chisel

        B:-The angle between the top face of the cutting point, and normal to the work


        C:-The angle between the bottom face of the point and tangent to the worksurface

        D:-Angle between axis of handle and peen

        Correct Answer:- Option-C

Question8:-Which hammer is used to spread metal in one direction at right angles

to the line of striking?

        A:-Straight pein hammer

        B:-Cross pein hammer

        C:-Ball pein hammer

        D:-Claw hammer

        Correct Answer:- Option-A

Question9:-Ratio between length and jaw width of a double end spanner.





        Correct Answer:- Option-B

Question10:-Distance moved by the spindle with one revolution of a thimble in


        A:-0.05 mm

        B:-0.5 mm

        C:-0.1 mm

        D:-0.01 mm

        Correct Answer:- Option-B

Question11:-How many blades are in the universal feeler gauge?





        Correct Answer:- Option-D

Question12:-Which material is used making for straight edge?

        A:-Cast iron

        B:-Grey cast iron

        C:-Mild steel

        D:-Aluminum alloy

        Correct Answer:- Option-B

Question13:-Which is the indirect measuring tool?

        A:-Inside micrometer

        B:-Outside micrometer

        C:-Feeler gauge

        D:-Telescopic gauge

        Correct Answer:- Option-D

Question14:-The distance between adjacent teeth of hack saw blade is known as





        Correct Answer:- Option-B

Question15:-Which type of nut has an internal groove cut in which a fiber or nylon

ring is inserted?

        A:-Square nut

        B:-T nut

        C:-Wing nut

        D:-Self locking nut

        Correct Answer:- Option-D

Question16:-In single cut file, what is the angle of teeth to center line?





        Correct Answer:- Option-C

Question17:-Which type of washers have made with serrations, cut and twisted?

        A:-Flat washer

        B:-Taper washer

        C:-Plate washer

        D:-Toothed lock washer

        Correct Answer:- Option-D

Question18:-Which law states that the pressure of a liquid is transmitted equally in

all directions?

        A:-Boyle's law

        B:-Pascal's law

        C:-Charle's law

        D:-Ohm's law

        Correct Answer:- Option-B

Question19:-Which action of liquid penetrant testing, the liquid penetrant dye seeps

into the defects of material?

        A:-Over flow




        Correct Answer:- Option-B

Question20:-How many ports have a 4/2 directional control hydraulic valve?





        Correct Answer:- Option-A

Question21:-What is meant by FRL unit in pneumatic system?

        A:-Filter rectified lubricator

        B:-Filter regeneration lubricator

        C:-Filter regulator lubricator

        D:-Flow regulator lubricator

        Correct Answer:- Option-C

Question22:-Which tool is mainly used to make external threading of a cylindrical



        B:-Drill bit

        C:-Die nut


        Correct Answer:- Option-D

Question23:-Which part of a drill bit is mainly using to determine its diameter?





        Correct Answer:- Option-D

Question24:-Which tool is used for chasing or reconditioning the damaged threads

and it is not used for cutting new threads?

        A:-Die nut

        B:-Circular split die

        C:-Half die

        D:-Button die

        Correct Answer:- Option-A

Question25:-Which vice is used for holding small diameter jobs, having a small

collect chuck at one end and it carries a set of jaws which are operated by turning

the handle?

        A:-Hand vice

        B:-pin vice

        C:-Toolmaker's vice

        D:-Bench vice

        Correct Answer:- Option-B

Question26:-What is the name of an amber coloured substance of non-corrosive

soldering flux extracted from pine tree sap?



        C:-Eutectic alloy

        D:-Sal ammoniac

        Correct Answer:- Option-A

Question27:-What is the other name of sheet metal seam called pittsburgh seam?

        A:-Grooved seam

        B:-Locked grooved seam

        C:-Hammer lock seam

        D:-Knocked up seam

        Correct Answer:- Option-C

Question28:-What is the shearing operation of a power press that circular holes are

punched in a regular pattern or evenly spaced?





        Correct Answer:- Option-D

Question29:-What is the name of black iron sheet which is coated with lead on it?

        A:-Tinned sheet

        B:-Duralumin sheet

        C:-Terne sheet

        D:-PVC sheet

        Correct Answer:- Option-C

Question30:-Where does electro-static shielding occur in a charged spherical shell?

        A:-When electrical potential outside spherical shell is zero

        B:-When electrical potential inside spherical shell is zero

        C:-Electrical field outside spherical shell is zero

        D:-Electrical field inside spherical shell is zero

        Correct Answer:- Option-D

Question31:-Which of the following circuit cannot be analysed using Ohm's law?





        Correct Answer:- Option-B

Question32:-Super position theorem is applicable for

        A:-Linear bilateral network

        B:-Non linear bilateral network

        C:-Linear unilateral network

        D:-All of the above

        Correct Answer:- Option-A

Question33:-Which type of meter is used to test the polarity of battery?

        A:-Moving iron ammeter

        B:-Moving iron voltmeter

        C:-Moving coil voltmeter

        D:-Dynamo meter type

        Correct Answer:- Option-C

Question34:-An example of non ohmic resistance is

        A:-Tungsten wire


        C:-Carbon resistance

        D:-Copper wire

        Correct Answer:- Option-B

Question35:-In which material if the temperature is increased then the resistance

will decreased?





        Correct Answer:- Option-B

Question36:-The SI unit of quantity of electricity is





        Correct Answer:- Option-C

Question37:-For the same rating which capacitor is physically smaller

        A:-Ceramic capacitor

        B:-Paper capacitor

        C:-Both have same size

        D:-None of the above

        Correct Answer:- Option-A

Question38:-Two resistors are said to be connected in series when

        A:-Total current is equal to the sum of branch current

        B:-Both carry the same value of current

        C:-Sum of IR drops equals the applied EMF

        D:-Same current passes in turn through both

        Correct Answer:- Option-D

Question39:-The energy in a lead acid battery is stored in the form of

        A:-Electrostatic charge

        B:-Chemical energy

        C:-Non flowing current

        D:-Nuclear energy

        Correct Answer:- Option-B

Question40:-Both the inductance and resistance of a coil are doubled the value of

        A:-Time constant is halved

        B:-Initial rate of rise of current is doubled

        C:-Final steady current is doubled

        D:-Time constant remains unchanged

        Correct Answer:- Option-D

Question41:-The phase difference between the primary and secondary voltage of a

transformer is

        A:-Zero degree

        B:-90 degree

        C:-180 degree

        D:-Between 30 degree and 60 degree

        Correct Answer:- Option-C

Question42:-Choose the correct relation

        A:-Potential = charge × capacity

        B:-Charge = potential/capacity

        C:-Potential = charge/capacity

        D:-Capacity = potential × charge

        Correct Answer:- Option-C

Question43:-Which is the advanced version of power electronic component used in

the output stage in drives?





        Correct Answer:- Option-C

Question44:-Why most of semi-conductor devices are made by silicon compared to


        A:-High barrier voltage

        B:-High resistance range

        C:-High thermal conductivity

        D:-High current carrying capacity

        Correct Answer:- Option-A

Question45:-Which type of biasing is required to an npn transistor for amplification?

        A:-Base ground, emitter and collector positive

        B:-Base negative, emitter positive and collector negative

        C:-Base positive, emitter negative and collector positive

        D:-Base positive, emitter negative and collector negative

        Correct Answer:- Option-C

Question46:-Which of the following logic gates gives high output with all its input






        Correct Answer:- Option-C

Question47:-The portion of weld joint that is melted by the heat of welding is called



        C:-Tack weld

        D:-Weld face

        Correct Answer:- Option-B

Question48:-The adding of iron powder to the electrode coating causes an increase


        A:-Metal penetration

        B:-Metal deposition rate

        C:-Weld speed

        D:-All of these

        Correct Answer:- Option-B

Question49:-Which of the following is a batch furnance?

        A:-Salt bath furnance

        B:-Fluidized Beds

        C:-Pit furnance

        D:-None of these

        Correct Answer:- Option-C

Question50:-In reverse polarity

        A:-More weld penetration

        B:-Less weld penetration

        C:-Deeper Weld Zone

        D:-All of these

        Correct Answer:- Option-B

Question51:-Pre-ignition is caused by the burning of the fuel in the combustion

chamber before the piston has reached the top dead centre, and is due to

        A:-Overheated spark plug points

        B:-Red hot carbon deposits on cylinder walls

        C:-Cylinder walls being too hot

        D:-Any of the mentioned above

        Correct Answer:- Option-D

Question52:-Theoretically correct air fuel mixture in a spark ignition engine





        Correct Answer:- Option-B

Question53:-The process of breaking up of a liquid into fine droplets by spraying is






        Correct Answer:- Option-C

Question54:-Which engine can be operated both in clock-wise and counter clockwise direction?

        A:-Two stroke engine

        B:-Four stoke engine

        C:-Both two stroke and four stroke engine

        D:-None of the above

        Correct Answer:- Option-A

Question55:-The ignition quality of diesel fuel is indicated by

        A:-Octane number

        B:-Calorific value

        C:-Cetane number

        D:-None of these

        Correct Answer:- Option-C

Question56:-The function of the compression ring is that it

        A:-Increases the combustion temperature

        B:-Creates swirling

        C:-Maintains a seal and prevents the fuel leakage

        D:-Maintains a seal and prevents escape of burned gases from the combustion

chamber to sump

        Correct Answer:- Option-D

Question57:-A cylinder block is normally made of


        B:-High carbon steel

        C:-Cast iron

        D:-Mild steel

        Correct Answer:- Option-C

Question58:-In a four stroke diesel engine, the inlet valve

        A:-Opens at T.D.C. and closes at B.D.C.

        B:-Opens at 10° before T.D.C and closes at 35° after B.D.C.

        C:-Opens at 10° after T.D.C. and closes at 30° before B.D.C

        D:-None of the above

        Correct Answer:- Option-B

Question59:-The oil pump used in the lubricating system of engine

        A:-Gear pump

        B:-Rotor pump

        C:-Plunger type pump

        D:-Any one of the above

        Correct Answer:- Option-D

Question60:-The most common firing order in a straight six cylinder engine




        D:-None of the above

        Correct Answer:- Option-A

Question61:-Clutch works on principle of




        D:-All the above

        Correct Answer:- Option-C

Question62:-The specific fuel consumption of diesel engine is

        A:-160 gm/bhp/hr

        B:-200 gm/bhp/hr

        C:-240 gm/bhp/hr

        D:-290 gm/bhp/hr

        Correct Answer:- Option-B

Question63:-Toe-in provide in tractor is approximately

        A:-4-8 mm

        B:-10-14 mm

        C:-15-18 mm

        D:-19-22 mm

        Correct Answer:- Option-A

Question64:-Hydraulic brake works on the principle of

        A:-Newton's law

        B:-Pascal's law

        C:-Boyles law

        D:-None of these

        Correct Answer:- Option-B

Question65:-A power tiller operates most satisfactory with


        B:-M.B. Plough

        C:-Disc harrow

        D:-Rotary tillage tool

        Correct Answer:- Option-D

Question66:-Weight transfer in a tractor implement system is caused by

        A:-Application of pull

        B:-Tractive force

        C:-Traction coefficient

        D:-All are correct

        Correct Answer:- Option-A

Question67:-An implement that fully supported by the tractor is

        A:-Trailed implement

        B:-Mounted implement

        C:-Semi mounted implements

        D:-All are correct

        Correct Answer:- Option-B

Question68:-The capacity of a battery is usually expressed in terms of




        D:-Ampere hours

        Correct Answer:- Option-D

Question69:-Relative movement of the wheel in direction of travel for given

distance under load and no load condition is

        A:-Coefficient of traction

        B:-Coefficient of rolling resistance

        C:-Wheel slip

        D:-Tractive efficiency

        Correct Answer:- Option-C

Question70:-The parking brakes employed in vehicles are operated




        D:-None of these

        Correct Answer:- Option-A

Question71:-_________ is preferred to make MB plough shares as it can be forged

        A:-Cast iron

        B:-Chilled cast iron

        C:-High carbon steel

        D:-All of the above

        Correct Answer:- Option-C

Question72:-When a plough works around a strip of ploughed land, the method of

ploughing is



        C:-Dead furrow

        D:-None of the above

        Correct Answer:- Option-A

Question73:-Which of the following factors affect the draft of a disc plough?

(i)   Speed of operation and soil moisture

(ii) Diameter of disc and disc concavity

(iii) Disc angle and tilt angle

        A:-(i) and (ii)

        B:-(ii) and (iii)

        C:-(i) and (iii)

        D:-All of the above (i), (ii) and (iii)

        Correct Answer:- Option-D

Question74:-A __________ is used for deep ploughing and breaking hard pan at

depth of 50 cm or more.

        A:-Chisel plough

        B:-Sub soiler

        C:-Duck foot cultivator

        D:-None of the above

        Correct Answer:- Option-B

Question75:-Which of the following statement/(s) is true regarding a tractor

operated rotovator?

(i)    Rotovator combines primary and secondary tillage in one operation

(ii)   Rotovator provides negative draft

        A:-Only (i)

        B:-Only (ii)

        C:-Both (i) and (ii)

        D:-Neither (i) nor (ii)

        Correct Answer:- Option-C

Question76:-The tilt angle of a vertical disc plough is

        A:-15-25 degrees

        B:-42-45 degrees

        C:-0 degree

        D:-None of the above

        Correct Answer:- Option-C

Question77:-Which of the following affect the penetration of a disc harrow in the


(i)     Lowering hitch point

(ii)    Increasing gang angle

(iii)   Using smaller diameter discs with lesser concavity

(iv)   Decreasing gang angle

        A:-(i), (ii) and (iii)

        B:-(i), (ii) and (iv)

        C:-(i) and (ii) only

        D:-(i) and (iii) only

        Correct Answer:- Option-A

Question78:-_______ is the flanged tube mounted on gang bolt between every two

discs of the disc harrows to prevent their lateral movement




        D:-None of the above

        Correct Answer:- Option-B

Question79:-The commonly made adjustments on cultivator shovels are

        A:-Setting for proper row width

        B:-Setting for depth

        C:-Turning shovel on tyne to displace required amount of soil

        D:-All of the above

        Correct Answer:- Option-D

Question80:-Vertical suction of an MBP is

        A:-3 to 5 mm

        B:-6 to 12 cm

        C:-5 to 10 mm

        D:-3 to 5 cm

        Correct Answer:- Option-A

Question81:-Chemical treatment using _________ removes the organic and physical

materials that clog the emitters in a drip irrigation system




        D:-All of the above

        Correct Answer:- Option-B

Question82:-Controlling an existing or potential high water table or artesian

groundwater condition using shallow or deep tube wells or open wells is called

__________ drainage

        A:-Sub surface




        Correct Answer:- Option-C

Question83:-Centrifugal pump is a type of __________ pump

        A:-Positive displacement



        D:-None of the above

        Correct Answer:- Option-B

Question84:-_________ starter is used in high rating 3 phase motors

        A:-On-off switch

        B:-Push button

        C:-Direct on-line


        Correct Answer:- Option-D

Question85:-Threshing can be accomplished by

        A:-Rubbing action

        B:-Impact action

        C:-Stripping action

        D:-All of the above

        Correct Answer:- Option-D

Question86:-The ________ type forage harvesters use free swinging chains,

hammers or knives to cut the crop


        B:-Cutter bar


        D:-All of the above

        Correct Answer:- Option-A

Question87:-Find the capacity of a field chopper with throat size 20 cm × 5 cm

operating at 50 rpm. The cutter head has two knives with length of cut 3 cm. The

bulk density of the material is 500 kg/m3 and the field efficiency of the chopper is


        A:-525 kg/h

        B:-500 kg/h

        C:-600 kg/h

        D:-720 kg/h

        Correct Answer:- Option-D

Question88:-The free threshed grain carried over the rack in the straw and

discharged from the combine harvester is called

        A:-Grain loss

        B:-Rack loss

        C:-Cylinder loss

        D:-Shoe loss

        Correct Answer:- Option-B

Question89:-The lead adjustment provided to the outer end of the cutter bar, when

the mower is not in operation is

        A:-1 cm per meter of cutter bar

        B:-2 cm per meter of cutter bar

        C:-3 cm per meter of cutter bar

        D:-5 cm per meter of cutter bar

        Correct Answer:- Option-B

Question90:-The distance of throw of water from a sprinkler depends on

(i)     Operating pressure

(ii)    Size and shape of nozzle

(iii)   Angle of nozzle

        A:-(i) only

        B:-(i) and (ii) only

        C:-(i) and (iii) only

        D:-All of the above (i), (ii) and (iii)

        Correct Answer:- Option-D

Question91:-______ separator is used based on the difference in aerodynamic

properties of various constituents of mixture

        A:-Spiral separator


        C:-Pneumatic separator

        D:-Inclined draper

        Correct Answer:- Option-C

Question92:-________ refers to the classification of cleaned products in to various

quality fractions





        Correct Answer:- Option-B

Question93:-_________ is a machinery used for squeezing or pressing the material

unit it breaks



        C:-Cutting machines

        D:-Flour mill

        Correct Answer:- Option-A

Question94:-Hammer mill works under the force of





        Correct Answer:- Option-D

Question95:-________ are used for lifting vertically between two pulleys to more

than 50 m

        A:-Bucket elevator

        B:-Screw conveyor

        C:-Belt conveyor

        D:-Pneumatic conveyor

        Correct Answer:- Option-A

Question96:-Modern facilities for storing the grains is

        A:-Pusa bin


        C:-Brick and cement bin

        D:-Bunker storage

        Correct Answer:- Option-B

Question97:-EMC gives an idea about

        A:-Initial moisture content of the material

        B:-Final moisture content of the material

        C:-Critical moisture content of the material

        D:-Whether the material will loose or gain the moisture at a particular set of

atmospheric conditions

        Correct Answer:- Option-D

Question98:-_________ method of drying is based on the sublimation of frozen

moisture from wet product

(i)     Fluidized bed

(ii)    Spray drying

(iii)   Freeze drying

(iv)   Vacuum drying

        A:-Only (i)

        B:-Both (ii) and (iv)

        C:-Both (i) and (iii)

        D:-Only (iii)

        Correct Answer:- Option-D

Question99:-_______ is used for fumigating grain in tall sealed silos

(i)     Chlorine

(ii)    Phosphine

(iii)   Carbon dioxide

        A:-Only (i)

        B:-Only (ii)

        C:-Both (i) and (iii)

        D:-Both (i) and (ii)

        Correct Answer:- Option-B

Question100:-Accuracy of the moisture content determination is obtained from

(i)     Direct method

(ii)    Indirect method

(iii)   Chemical method

        A:-Only (i)

        B:-Only (ii)

        C:-Both (i) and (ii)

        D:-Only (iii)

        Correct Answer:- Option-A

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