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Current Affairs January 2024

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4

To prevent the body of the blade from jamming in the saw cut, the teeth of blade are

A. Strengthened

B. Sharpened

C. Set

D. All of these

Correct Answer :

C. Set


Related Questions

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Thermit welding is often used in

A. Replacing broken gear teeth

B. Repairing broken shears

C. Joining rails, truck frames and locomotive frames etc.

D. All of the above

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The flux commonly used in brazing is

A. Zinc chloride

B. Ammonium chloride

C. Rosin plus alcohol

D. Borax

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According to Indian standards, the total numbers of tolerance grades are

A. 8

B. 12

C. 18

D. 20

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In arc welding, the electric arc is produced between the work and the electrode by

A. Voltage

B. Flow of current

C. Contact resistance

D. All of these

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4

When filing soft metals, the file teeth are clogged with minute particles of metal. The file should be cleaned by

A. Washing it with water

B. Rubbing on wood

C. Washing it with dilute acid

D. Using file card

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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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In permanent mould casting method

A. Molten metal is poured in a metallic mould, retained in the mould long enough for the outer skin to solidify and finally mould is turned over to remove molten metal still in molten condition

B. Molten metal is poured and allowed to solidify while the mould is revolving

C. Molten metal is forced into mould under high pressure

D. None of the above

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A hacksaw blade cuts on the

A. Forward stroke

B. Return stroke

C. Both forward and return strokes

D. Cutting depends upon the direction of force

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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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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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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

Galvanising is a

A. Zinc diffusion process

B. Process of coating zinc by hot dipping

C. Process used for making thin phosphate coating on steel

D. None of the above

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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

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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The mode of deformation of the metal during spinning is

A. Bending

B. Stretching

C. Rolling and stretching

D. Bending and stretching

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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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Riddle 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 moulding box

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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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Which one of the following material will require the largest size of riser for the same size of casting?

A. Aluminium

B. Cast iron

C. Steel

D. Copper

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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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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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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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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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A mortise gauge is a

A. Striking tool

B. Planing tool

C. Boring tool

D. Marking tool

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4

The welding process used to join the ends of two pipes of uniform cross-section, is

A. Spot welding

B. Seam welding

C. Projection welding

D. Upset butt 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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Cutting and forming operations can be performed in a single operation in a

A. Simple die

B. Progressive die

C. Compound die

D. Combination die

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A zinc diffusion process is called

A. Galvanising

B. Anodising

C. Parkerising

D. Sherardizing

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An oxidising process used for aluminium and magnesium articles is called

A. Galvanising

B. Anodising

C. Parkerising

D. Sherardizing

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In ________ welding, the weld may be made either from left to right or from right to left.

A. Forehand

B. Backhand

C. Vertical

D. None of these