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What is the correct answer?

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°

Correct Answer :

A. 30°-40°


Related Questions

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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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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

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

A. Same

B. Less

C. More

D. None of these

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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

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 tolerance produced by shell moulding process of casting is

A. +0.05 mm

B. ±0.2 mm

C. +0.5 mm

D. ±1 mm

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4

In welding magnesium with TIG arc welding, direct current with _________ is used.

A. Straight polarity

B. Reversed polarity

C. Both (A) and (B)

D. None of these

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4

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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4

In order to deliver molten metal from pouring basin to gate, a ________ is used.

A. Riser

B. Sprue

C. Core

D. None of these

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4

In die casting, machining allowance is

A. Small

B. Large

C. Very large

D. Not provided

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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 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 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 draft or taper allowance on casting is generally

A. 1 to 2 mm/m

B. 2 to 5 mm/m

C. 5 to 10 mm/m

D. 10 to 15 mm/m

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4

A diamond pointed chisel is used for cutting

A. Flat surfaces

B. Grooves

C. Keyways

D. V-shaped grooves

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4

The type of file used for a wood work is

A. Single cut file

B. Double cut file

C. Rasp cut file

D. Any one of these

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4

When the dimension is expressed as 20 -0.025 ⁺⁰⁰³⁵, then the basic size is

A. 20 mm

B. 20.035 mm

C. 20.025 mm

D. 19.975 mm

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4

Cast iron and steel pipes are produced by

A. Slush casting

B. Investment casting

C. True centrifugal casting

D. Die casting

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4

Loam 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 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

In average work, the tolerance produced by investment casting method is

A. ±0.05 mm

B. +0.2 mm

C. +05 mm

D. +1 mm

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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

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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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

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 centrifugal casting method, is used for casting articles of

A. Symmetrical shape about vertical axis

B. Symmetrical shape about horizontal axis

C. Irregular shape

D. Nonferrous metal only

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4

The electrode tip diameter (d) in spot welding should be equal to (where t = Thickness of plate to be welded)

A. t

B. 1.5 t

C. 3 t

D. 6 t

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4

The recrystallisation temperature of steel is

A. 400°C

B. 600°C

C. 800°C

D. None of these

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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

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4

The oxyacetylene gas used in gas welding produce a flame temperature of

A. 1800°C

B. 2100°C

C. 2400°C

D. 3200°C