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4

In a four high rolling mill, the diameter of backing up rolls is ________ the diameter of working rolls.

A. Equal to

B. Smaller than

C. Larger than

D. None of these

Correct Answer :

C. Larger than


Related Questions

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4

The teeth of hacksaw blade are bent

A. Towards right

B. Towards left

C. Alternately towards right and left and every third or fourth left straight

D. May be bent in any direction

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In a ________, two or more operations are performed simultaneously at the single stroke of the ram.

A. Simple die

B. Progressive die

C. Combination die

D. Compound die

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4

In a four high rolling mill, there are four rolls out of which

A. One is working roll and three are backing up rolls

B. Two are working rolls and two are backing up rolls

C. Three are working rolls and one is backing up roll

D. All of the four are working rolls

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4

A rip saw

A. Is a two man saw

B. Is used for cutting along the grains of wood

C. Has a narrow blade with two wooden handles

D. All of the above

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The sand used for making cores is

A. Green sand

B. Dry sand

C. Loam sand

D. Oil sand

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Which of the following welding process uses non-consumable electrodes?

A. TIG welding

B. MIG welding

C. Manual arc welding

D. Submerged arc welding

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4

During drawing operation, the states of stress in cup would include

A. Compressive stress in the flange

B. Tensile stress in the wall

C. Both (A) and (B)

D. None of these

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4

The accuracy of micrometers, calipers, dial indicators can be checked by a

A. Feeler gauge

B. Slip gauge

C. Ring gauge

D. Plug gauge

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In order to get uniform thickness of the plate by rolling process, one provides

A. Camber on the rolls

B. Offset on the rolls

C. Hardening of the rolls

D. Antifriction bearings

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A casting defect which occurs near the ingates as rough lumps on the surface of a casting is known as

A. Shift

B. Sand wash

C. Swell

D. Scab

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Cores are used to

A. Form internal cavities in the casting

B. Improve mould surface

C. Form a part of a green sand mould

D. All of these

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In a cold chamber die casting machine

A. Melting pot is separate from the machine

B. Melting pot is an integral part of the machine

C. Melting pot may have any location

D. Low temperature and pressure is used

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The operation of cutting a sheet of metal in a straight line along the length, is known as

A. Plunging

B. Notching

C. Slitting

D. Forming

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Scribing block is used to

A. Hold the round bars during marking

B. Check the trueness of flat surfaces

C. Locate the centres of round bars

D. Check the surface roughness

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Which of the following methods can be used for manufacturing 2 metre long seamless metallic tubes?

A. Drawing

B. Extrusion

C. Rolling

D. Extrusion and rolling

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The process extensively used for making bolts and nuts is

A. Hot piercing

B. Extrusion

C. Cold peening

D. Cold heading

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The welding process used in joining mild steel shanks to high speed drills, is

A. Spot welding

B. Seam welding

C. Flash butt welding

D. Upset butt welding

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The current in electric resistance welding can be regulated by

A. Varying the input supply

B. Changing the primary turns of the transformer

C. Changing the secondary turns of the transformer

D. Any one of the above

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The operation of cutting a cylindrical hole in a sheet of metal by the punch and die is called

A. Shearing

B. Piercing

C. Punching

D. Blanking

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In welding copper alloys with TIG arc welding

A. Direct current with straight polarity is used

B. Direct current with reversed polarity is used

C. Alternating current is used

D. Any one of these

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4

A hacksaw blade is specified by its

A. Length

B. Material

C. Width

D. Number of teeth

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In a _________, the molten metal is poured and allowed to solidify while the mould is revolving.

A. Die casting method

B. Slush casting method

C. Permanent mould casting method

D. Centrifugal casting method

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In sheet metal blanking, shear is provided on punches and dies so that

A. Press load is reduced

B. Good cut edge is obtained

C. Warping of sheet is minimised

D. Cut blanks is straight

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For welding plates of thickness less than 5 mm, its edges

A. Do not require bevelling

B. Should be bevelled to a single-V or U-groove

C. Should have a double-V or U-groove on one side

D. Should have a double-V or U-groove on both sides

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4

The diaphragm moulding machine is used to

A. Ram the sand harder at the pattern face with decreasing hardness towards the back of the mould

B. Ram the sand harder at the back of the mould and softer on the pattern face

C. Produce uniform packing of sand in the mould

D. Give uniform sand hardness throughout the mould

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4

In a gas welding of mild steel using an oxyacetylene flame, the total amount of acetylene consumed is 10 litres. The oxygen consumption from the cylinder is

A. 5 litres

B. 10 litres

C. 15 litres

D. 20 litres

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In spot welding, the distance between the nearest edge of the plate and centre of weld should be equal to

A. d

B. 1.5d

C. 3d

D. 6d

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4.Linde welding uses

A. Neutral flame and rightward technique

B. Oxidising flame and leftward technique

C. Neutral flame and leftward technique

D. Carburising flame and rightward technique

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The welding set up is said to have straight polarity, when

A. Work is connected to the positive terminal and the electrode holder to the negative terminal

B. Work is connected to the negative terminal and the electrode holder to the positive terminal

C. Work is connected to the positive terminal and the electrode holder is earthed

D. Work is connected to the negative terminal and the electrode holder is earthed

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In ________ welding, the weld may be made either from left to right or from right to left.

A. Forehand

B. Backhand

C. Vertical

D. None of these