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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

Correct Answer :

C. Drop core


Related Questions

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4

In submerged arc welding, an arc is produced between a

A. Carbon electrode and the work

B. Metal electrode and the work

C. Bare metal electrode and the work

D. Two tungsten electrodes and the work

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4

The blank diameter used in thread rolling will be

A. Equal to minor diameter of the thread

B. Equal to pitch diameter of the thread

C. A little larger than the minor diameter of the thread

D. A little larger than the pitch diameter of the thread

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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 arc welding, the temperature of heat produced by the electric arc is of the order of

A. 3000°C to 4000°C

B. 4000°C to 5000°C

C. 5000°C to 6000°C

D. 6000°C to 7000°C

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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

The temperature produced by oxy-hydrogen flame is about

A. 1800°C

B. 2100°C

C. 2400°C

D. 3200°C

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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

During cold working process

A. Grain structure is distorted

B. Strength and hardness of metal increases

C. Close dimensional tolerance can be maintained

D. All of the above

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4

The instrument used to measure external and internal diameter of shafts, thickness of parts and depth of holes, is

A. Outside micrometer

B. Inside micrometer

C. Depth gauge micrometer

D. Vernier caliper

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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

In a hot chamber die casting machine

A. Ferrous alloys with low melting temperature are casted

B. Ferrous alloys with high melting temperature are casted

C. Nonferrous alloys with low melting temperature are casted

D. Nonferrous alloys with high melting temperature are casted

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4

In backhand welding, the angle between the welding torch and the work is kept as

A. 30°-40°

B. 40°-50°

C. 50°-60°

D. 60°-70°

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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

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

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4

The cross-section of a chisel is usually

A. Rectangular

B. Square

C. Hexagonal

D. Octagonal

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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

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 surface to be left unmachined is marked on the pattern by

A. Red colour

B. Yellow colour

C. Black colour

D. Blue colour

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4

Neutral flame is used to weld

A. Steel

B. Cast iron

C. Copper

D. All of these

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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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4

The chisel used for cutting key ways is

A. Flat chisel

B. Cape chisel

C. Round nose chisel

D. Diamond pointed chisel

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4

For gas welding, the pressure desired at the welding torch for oxygen is

A. 7 to 103 kN/m²

B. 70 to 280 kN/m²

C. 280 to 560 kN/m²

D. 560 to 840 kN/m²

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4

When a pattern is made in three parts, the top part, is known as a

A. Drag

B. Cheek

C. Cope

D. None of these

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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

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

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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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

The oxygen cylinder is usually painted with

A. Black colour

B. White colour

C. Maroon colour

D. Yellow colour

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4

Green sand is a mixture of

A. 30% sand and 70% clay

B. 50% sand and 50% clay

C. 70% sand and 30% clay

D. 90% sand and 10% clay

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4

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