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4

In electric resistance welding, voltage required for heating is

A. 1 to 5 volts

B. 6 to 10 volts

C. 11 to 20 volts

D. 50 to 100 volts

Correct Answer :

B. 6 to 10 volts


Related Questions

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4

The acetylene cylinder is usually painted with

A. Black colour

B. White colour

C. Maroon colour

D. Yellow colour

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4

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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4

Which of the following welding method uses a pool of molten metal?

A. Carbon arc welding

B. Submerged arc welding

C. TIG arc welding

D. MIG arc welding

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4

In blanking operation, the clearance is provided on

A. Punch

B. Die

C. Half on the punch and half on the die

D. Either on punch or die depending upon designer's choice

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For obtaining a cup of diameter 25 mm and height 15 mm by drawing, the size of the round blank should be approximately

A. 42 mm

B. 44 mm

C. 46 mm

D. 48 mm

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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

The upsetting is a process of

A. Increasing the cross-section of a bar

B. Reducing the cross-section of a bar

C. Joining the two surfaces of metal under pressure after heating

D. Bending of a bar

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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

The parts of circular cross-section which are symmetrical about the axis of rotation are made by

A. Hot forging

B. Hot spinning

C. Hot extrusion

D. Hot drawing

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4

The purpose of a gate is to

A. Delivers molten metal into the mould cavity

B. Act as a reservoir for the molten metal

C. Feed the molten metal to the casting in order to compensate for the shrinkage

D. Delivers molten metal from pouring basin to gate

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4

When more volume of acetylene and less volume of oxygen is supplied, then a ________ flame is obtained.

A. Neutral

B. Oxidising

C. Carburising

D. None of these

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4

In order to produce uniform packing of sand in the moulds, a __________ is used.

A. Sand slinger

B. Squeezing machine

C. Jolt machine

D. Stripper plate machine

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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

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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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

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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 electric resistance welding, voltage required for heating is

A. 1 to 5 volts

B. 6 to 10 volts

C. 11 to 20 volts

D. 50 to 100 volts

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4

The cutting edge of a chisel should be

A. Hardened

B. Tempered

C. Hardened and tempered

D. Case hardened

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4

The electrodes used in spot welding have a tip of

A. Stainless steel

B. Aluminium

C. Copper

D. Brass

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4

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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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

The temperature of the inner luminous cone of neutral flame is about

A. 1000°C

B. 1250°C

C. 2100°C

D. 3200°C

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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

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 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

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

Piercing is an operation of cutting

A. A cylindrical hole in a sheet of metal by the punch and the die

B. A hole (other than cylindrical) in a sheet of metal by the punch and the die

C. A flat sheet to the desired shape

D. A number of holes evenly spaced in a regular pattern on a sheet of metal

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4

The casting method adopted for ornaments and toys of nonferrous alloys, is

A. Permanent mould casting

B. Slush casting

C. Die casting

D. Centrifugal 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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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