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4

The minimum size of a bloom is

A. 5 cm × 5 cm

B. 10 cm × 10 cm

C. 15 cm × 15 cm

D. 20 cm × 20 cm

Correct Answer :

C. 15 cm × 15 cm


Related Questions

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4

Tandem drawing of wires and tubes is necessary because

A. It is not possible to reduce at one stage

B. Annealing is needed between stages

C. Accuracy in dimensions is not possible otherwise

D. Surface finish improves after every drawing stage

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4

The maximum flame temperature occurs

A. At the outer cone

B. At the inner cone

C. Between the outer and inner cone

D. At the torch tip

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4

In a unilateral system of tolerance, the tolerance is allowed on

A. One side of the actual size

B. One side of the nominal size

C. Both sides of the actual size

D. Both sides of the nominal size

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4

In electric resistance welding, pressure applied varies from

A. 1 to 5 MPa

B. 5 to 10 MPa

C. 10 to 25 MPa

D. 25 to 55 MPa

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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

In order to ram the sand harder at the back of the mould and softer on the pattern face, a ________ is used.

A. Sand slinger

B. Squeezing machine

C. Jolt machine

D. Stripper plate machine

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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

Rotary swaging

A. Is extensively used for making bolts and rivets

B. Is used for reducing the diameters of round bars and a tube by rotating dies which open and close rapidly on the work

C. Is used to improve fatigue resistance of the metal by setting up compressive stresses in its surface

D. Consists of pressing the metal inside a chamber to force it out by high pressure through an orifice which is shaped to provide the desired form of the finished part

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4

A taper provided on the pattern for its easy and clean withdrawal from the mould is known as

A. Machining allowance

B. Draft allowance

C. Shrinkage allowance

D. Distortion allowance

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4

Extrusion

A. Is extensively used for making bolts and nuts

B. Is used for reducing the diameter of round bars and tubes by rotating dies which open and close rapidly on the work

C. Is used to improve fatigue resistance of the metal by setting up compressive stresses in its surface

D. Consists of pressing the metal inside a chamber to force it out by high pressure through an orifice which is shaped to provide the desired form of the finished part

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4

A pattern maker's shrinkage rule considers

A. All pattern allowances

B. Only shrinkage allowance

C. All materials to be cast

D. All materials of the pattern

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4

The instrument which has all the features of try-square, bevel protractor, rule and scriber, is

A. Outside micrometer

B. Inside micrometer

C. Depth gauge micrometer

D. Combination set

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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

The metal patterns as compared to wooden patterns require less

A. Shrinkage allowance

B. Machining allowance

C. Draft allowance

D. Distortion allowance

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4

When a hole or cavity to be cored is not in line with the parting surface, then a ________ is used.

A. Horizontal core

B. Vertical core

C. Drop core

D. Balanced core

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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

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

The directional solidification in casting can be improved by using

A. Chills and chaplets

B. Chills and padding

C. Chaplets and padding

D. Chills, chaplets and padding

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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

Spot welding is used for welding

A. Lap joints in plates having 0.025 mm to 1.25 mm thickness

B. Lap joints in plates having thickness above 3 mm

C. Butt joints in plates having 0.025 mm to 1.25 mm thickness

D. Butt joints in plates having thickness above 3 mm

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4

The width of slot cut by a hacksaw blade is _______ the width of the blade.

A. Equal to

B. Less than

C. Greater than

D. None of these

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4

The adhesiveness is the property of sand due to which

A. It evolves a great amount of steam and other gases

B. The sand grains stick together

C. It clings to the sides of a moulding box

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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4

In backhand welding, the angle between the welding rod and the work is ________ as compared to forehand welding.

A. Same

B. Less

C. More

D. None of these

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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

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

In a bilateral system of tolerance, the tolerance is allowed on

A. One side of the actual size

B. One side of the nominal size

C. Both sides of the actual size

D. Both sides of the nominal size

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4

The process of increasing the cross-section of a bar at the expense of its length, is called

A. Drawing down

B. Upsetting

C. Spinning

D. Peening

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4

The property of sand due to which it evolves a great amount of steam and other gases is called

A. Collapsibility

B. Permeability

C. Cohesiveness

D. Adhesiveness

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4

The increase in hardness due to cold working, is called

A. Age hardening

B. Work hardening

C. Induction hardening

D. Flame hardening