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4

Thread rolling is restricted to

A. Ferrous materials

B. Ductile materials

C. Hard materials

D. None of these

Correct Answer :

B. Ductile materials


Related Questions

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4

Aluminium is the best material for making patterns because it is

A. Light in weight

B. Easy to work

C. Corrosion resistant

D. All of these

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4

In forehand welding, the angle between the welding rod and the work is kept as

A. 30°-40°

B. 40°-50°

C. 50°-60°

D. 60°-70°

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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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4

The process of decreasing the cross-section of a bar and increasing its length, is called

A. Drawing down

B. Upsetting

C. Spinning

D. Peening

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4

A progressive limit gauge has

A. 'Go' and 'Not go' member on the same side of the gauge

B. Separate 'Go' and 'Not go' members

C. 'Go' member at one end and 'Not go' member at the other end

D. None of the above

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4

The operation of straightening a curved sheet metal, is known as

A. Drawing

B. Squeezing

C. Coining

D. Planishing

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4

The property of sand due to which the sand grains stick together is called

A. Collapsibility

B. Permeability

C. Cohesiveness

D. Adhesiveness

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4

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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4

In a compound die

A. Only one operation is performed at each stroke of the ram

B. Two or more operations are performed simultaneously at the single stroke of the ram

C. Two or more cutting operations are performed at one station of the press in every stroke of the ram

D. Both cutting and non-cutting operations are performed at one station of the press in every stroke of the ram

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4

The temperature at which the new grains are formed in the metal is called

A. Lower critical temperature

B. Upper critical temperature

C. Eutectic temperature

D. Recrystallisation temperature

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4

The dowels are

A. Wooden nails

B. Box nails

C. Wire nails

D. None of these

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4

The difference between the upper limit and lower limit of a dimension is called

A. Nominal size

B. Basic size

C. Actual size

D. Tolerance

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4

To prevent the body of the blade from jamming in the saw cut, the teeth of blade are

A. Strengthened

B. Sharpened

C. Set

D. All of these

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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 flux commonly used in brazing is

A. Zinc chloride

B. Ammonium chloride

C. Rosin plus alcohol

D. Borax

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4

Lancing is the operation of

A. Cutting a sheet of metal in a straight line along the length

B. Removal of metal to the desired shape from the edge of a plate

C. Cutting a sheet of metal through part of its length and then bending the cut portion

D. Bending a sheet of metal along a curved axis

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4

A basic shaft is one whose

A. Lower deviation is zero

B. Upper deviation is zero

C. Lower and upper deviations are zero

D. None of these

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4

The cold working of metals is carried out

A. At the recrystallisation temperature

B. Below the recrystallisation temperature

C. Above the recrystallisation temperature

D. At any temperature

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4

The sand used for making cores is

A. Green sand

B. Dry sand

C. Loam sand

D. Oil sand

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4

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

When the file is moved to and fro over the work, it is known as

A. Cross filing

B. Draw filing

C. Pull and push filing

D. None of these

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4

Galvanising is a

A. Zinc diffusion process

B. Process of coating zinc by hot dipping

C. Process used for making thin phosphate coating on steel

D. None of the above

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4

Shift is a casting defect which

A. Results in a mismatching of the top and bottom parts of a casting

B. Results in general enlargement of a casting

C. Occurs near the ingates as rough lumps on the surface of a casting

D. Occurs as sand patches on the upper surface of a casting

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4

In order to check the clearance between two mating surfaces, a ________ gauge should be used.

A. Ring

B. Plug

C. Feeler

D. None of these

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4

The cold chisels are made from

A. Cast iron

B. Mild steel

C. High speed steel

D. Cast tool steel

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4

Which of the following material can be used for making patterns?

A. Aluminium

B. Wax

C. Lead

D. All of these

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4

Which of the following statement is wrong?

A. The hot chamber die casting machine is used for casting zinc, tin, lead and other low melting alloys.

B. The cold chamber die casting machine is used for casting aluminium, magnesium, copper base alloys and other high melting alloys.

C. The castings produced by centrifugal casting method have open and coarse grained structure.

D. All of the above

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4

A casting defect which results in general enlargement of a casting is known as

A. Shift

B. Sand wash

C. Swell

D. Scab

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4

A three high rolling mill consists of three rolls placed one above the other. Which of the following statement is correct?

A. The upper and middle rolls rotate in the same direction whereas the bottom roll rotates in opposite direction

B. The upper and bottom rolls rotate in the same direction whereas the middle roll rotates in opposite direction

C. The bottom and middle roll rotate in the same direction

D. Any one of the above

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4

Seam welding is a

A. Continuous spot welding process

B. Multi-spot welding process

C. Arc welding process

D. Process used for joining round bars