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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

Correct Answer :

C. Greater than


Related Questions

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4

When a pattern is made in three parts, the ________ is known as a drag.

A. Bottom part

B. Middle part

C. Top part

D. None of these

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4

Which of the following statement is wrong?

A. The hot chamber die casting machine is used for casting zinc, tin, lead and other low melting alloys.

B. The cold chamber die casting machine is used for casting aluminium, magnesium, copper base alloys and other high melting alloys.

C. The castings produced by centrifugal casting method have open and coarse grained structure.

D. All of the above

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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 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 shielded arc welding

A. Large electrode is used

B. Welding rod coated with slag is used

C. Welding rod coated with fluxing material is used

D. None of the above

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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

A three high rolling mill consists of three rolls placed one above the other. Which of the following statement is correct?

A. The upper and middle rolls rotate in the same direction whereas the bottom roll rotates in opposite direction

B. The upper and bottom rolls rotate in the same direction whereas the middle roll rotates in opposite direction

C. The bottom and middle roll rotate in the same direction

D. Any one of the above

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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

A ring gauge is used to

A. Check the diameter of shafts or studs

B. Test the accuracy of holes

C. Check the clearance between two mating surfaces

D. All of the above

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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

Aluminium is the best material for making patterns because it is

A. Light in weight

B. Easy to work

C. Corrosion resistant

D. All of these

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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

In die casting, machining allowance is

A. Small

B. Large

C. Very large

D. Not provided

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A sand employed on the faces of the pattern before moulding, is called

A. Green sand

B. Dry sand

C. Loam sand

D. Parting sand

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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

A casting defect which results in general enlargement of a casting is known as

A. Shift

B. Sand wash

C. Swell

D. Scab

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4

In a centrifugal casting method

A. Core is made of sand

B. Core is made of ferrous metal

C. Core is made of nonferrous metal

D. No core is used

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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

Thread rolling is restricted to

A. Ferrous materials

B. Ductile materials

C. Hard materials

D. None of these

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4

In a cold chamber die casting machine, only nonferrous alloys with _________ are casted.

A. Low melting temperature

B. High melting temperature

C. Both (A) and (B)

D. None of these

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4

In piercing 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

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 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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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

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

A neutral flame is obtained by supplying

A. Equal volumes of oxygen and acetylene

B. More volume of oxygen and less volume of acetylene

C. More volume of acetylene and less volume of oxygen

D. None of the above

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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

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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Spot welding is used for welding

A. Lap joints in plates having 0.025 mm to 1.25 mm thickness

B. Lap joints in plates having thickness above 3 mm

C. Butt joints in plates having 0.025 mm to 1.25 mm thickness

D. Butt joints in plates having thickness above 3 mm

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4

In TIG arc welding, the welding zone is shielded by an atmosphere of

A. Helium gas

B. Argon gas

C. Either (A) or (B)

D. None of these