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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

Correct Answer :

B. At the inner cone


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

In a cold chamber die casting machine

A. Melting pot is separate from the machine

B. Melting pot is an integral part of the machine

C. Melting pot may have any location

D. Low temperature and pressure is used

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4

When the molten metal is fed in the cavity of a metallic mould by gravity, the method of casting is known as

A. Die casting method

B. Slush casting method

C. Permanent mould casting method

D. Centrifugal casting method

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4

Scribing block is used to

A. Hold the round bars during marking

B. Check the trueness of flat surfaces

C. Locate the centres of round bars

D. Check the surface roughness

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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

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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4

Swab is used for

A. Smoothing and cleaning out depressions in the mould

B. Cleaning the moulding sand

C. Moistening the sand around the edge before removing pattern

D. Reinforcement of sand in the top part of the moulding box

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4

Which of the following statement is wrong?

A. The angular clearance on dies varies from 0.5° to 1°

B. In drawing operation, the metal flows due to plasticity

C. In press operation, the size of the pierced hole is independent of the size of punch

D. None of the above

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4

The cold chisels are made by

A. Drawing

B. Rolling

C. Piercing

D. Forging

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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

For welding plates of thickness less than 5 mm, its edges

A. Do not require bevelling

B. Should be bevelled to a single-V or U-groove

C. Should have a double-V or U-groove on one side

D. Should have a double-V or U-groove on both sides

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4

The surface to be machined is marked on the pattern by

A. Red colour

B. Yellow colour

C. Black colour

D. Blue colour

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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

V-block is used to

A. Check the trueness of flat surfaces

B. Locate centres of round rods

C. Check the surface roughness

D. None of these

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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

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 process used to improve fatigue resistance of the metal by setting up compressive stresses in its surface, is known as

A. Hot piercing

B. Extrusion

C. Cold peening

D. Cold heading

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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

During hot working of metals

A. Porosity of the metal is largely eliminated

B. Grain structure of the metal is refined

C. Mechanical properties are improved due to refinement of grains

D. All of the above

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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

The algebraic difference between the maximum limit and the basic size is called

A. Actual deviation

B. Upper deviation

C. Lower deviation

D. Fundamental deviation

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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

In forehand welding, the weld is made

A. From left to right

B. From right to left

C. First from left to right and then from right to left

D. Either from left to right or from right to left

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4

The brass and bronze are welded by _________ flame.

A. Neutral

B. Oxidising

C. Carburising

D. All of these

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4

In a _________, both cutting and non-cutting operations are performed at one station of the press in every stroke of the ram.

A. Simple die

B. Progressive die

C. Combination die

D. Compound die

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4

The algebraic difference between the minimum limit and the basic size is called

A. Actual deviation

B. Upper deviation

C. Lower deviation

D. Fundamental deviation

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4

Which of the following methods can be used for manufacturing 2 metre long seamless metallic tubes?

A. Drawing

B. Extrusion

C. Rolling

D. Extrusion and rolling

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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 most preferred process for casting gas turbine blades is

A. Die casting

B. Shell moulding

C. Investment moulding

D. Sand casting

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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