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4

When the temperature of a solid metal increases,

A. Strength of the metal decreases but ductility increases

B. Both strength and ductility of the metal decreases

C. Both strength and ductility of the metal increases

D. Strength of the metal increases but ductility decreases

Correct Answer :

A. Strength of the metal decreases but ductility increases


Related Questions

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4

The chuck preferred for quick setting and accurate centering of a job is

A. Four jaw independent chuck

B. Collect chuck

C. Three jaw universal chuck

D. Magnetic chuck

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4

The operation of smoothing and squaring the surface around a hole is known as

A. Counter-sinking

B. Counter-boring

C. Trepanning

D. Spot facing

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4

A drill mainly used in drilling brass, copper or softer materials, is

A. Flat drill

B. Straight fluted drill

C. Parallel shank twist drill

D. Tapered shank twist drill

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4

Negative rakes are used for

A. Carbide tools

B. Heavy loads

C. Harder materials

D. All of these

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4

The top and sides of the table of a shaper usually have

A. L-type slots

B. T-type slots

C. I-type slots

D. Any one of these

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4

The cutting tool in a milling machine is mounted on

A. Spindle

B. Arbor

C. Column

D. Knee

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4

A fine grained grinding wheel is used to grind

A. Hard and brittle materials

B. Soft and ductile materials

C. Hard and ductile materials

D. Soft and brittle materials

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4

In _________ operation, the cutting force is maximum when the tooth begins its cut and reduces it to minimum when the tooth leaves the work.

A. Up milling

B. Down milling

C. Face milling

D. End milling

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4

The size of abrasive grain required in a grinding wheel depends upon the

A. Amount of material to be removed

B. Hardness of material being ground

C. Finish desired

D. All of these

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4

The main purpose of a boring operation, as compared to drilling, is to

A. Drill a hole

B. Finish the drilled hole

C. Correct the hole

D. Enlarge the existing hole

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4

A mandrel is used to hold

A. An eccentric work

B. A heavy work

C. A thin work

D. None of these

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4

Flank wear depends upon the

A. Hardness of the work and tool material at the operating temperature

B. Amount and distribution of hard constituents in the work material

C. Degree of strain hardening in the chip

D. All of these

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4

Which one among the following welding processes uses nonconsumable electrode?

A. Gas metal arc welding

B. Submerged arc welding

C. Gas tungsten arc welding

D. Flux coated arc welding

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4

For turning small taper on long workpiece, the suitable method is

A. By a form tool

B. By setting over the tail stock

C. By a taper turning attachment

D. By swivelling the compound rest

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4

The type of tool used on lathe, shaper and planer is

A. Single point cutting tool

B. Two point cutting tool

C. Three point cutting tool

D. Multipoint cutting tool

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4

A __________ grinding wheel is used to grind soft materials.

A. Course grained

B. Medium grained

C. Fine grained

D. None of these

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4

The taper on the lathe spindle is

A. 1 in 10

B. 1 in 15

C. 1 in 20

D. 1 in 30

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4

If a gas metal arc process uses a low arc voltage and the arc is continuously interrupted as the molten electrode metal fills up the arc gap is known as

A. ARC

B. Short ARC

C. ARC length

D. ARC blow

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4

Which of the following engineering materials is the most suitable candidate for hot chamber die casting?

A. Low carbon steel

B. Titanium

C. Copper

D. Tin

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4

Hardness of green sand mould increases with

A. Increase in moisture content beyond 6 percent

B. Increase in permeability

C. Decrease in permeability

D. Increase in both moisture content and permeability

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4

The cutting angle of a flat drill varies from

A. 3° to 8°

B. 20° to 30°

C. 60° to 90°

D. 90° to 120°

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4

A 15 mm drilling machine means that it can drill a hole

A. Of maximum diameter 15 mm

B. In 15 mm thick plates

C. Having cross-sectional area of 15 mm²

D. None of these

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4

A twist drill is a

A. Side cutting tool

B. Front cutting tool

C. End cutting tool

D. None of these

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4

Cold working of steel is defined as working

A. At its recrystallisation temperature

B. Above its recrystallisation temperature

C. Below its recrystallisation temperature

D. At two thirds of the melting temperature of the metal

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4

Which of the following operations can be performed with milling cutters?

A. Cutting key ways on shafts

B. Cutting external screw threads

C. Cutting teeth of spur gears

D. All of these

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4

Hot rolling of mild steel is carried out

A. At recrystallization temperature

B. Between 100⁰C to 150⁰C

C. Between recrystallization temperature

D. Above recrystallization temperature

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4

The swing diameter over the bed is ________ the height of the centre measured from the bed of the lathe.

A. Equal to

B. Twice

C. Thrice

D. One-half

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4

A single point thread cutting tool should ideally hav

A. Zero rake angle

B. Positive rake angle

C. Negative rake angle

D. Point angle

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4

The example of snag grinding is

A. Trimming the surface left by sprues and risers on castings

B. Grinding the parting line left on castings

C. Removing flash on forgings

D. All of these

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4

For turning internal tapers, the suitable method is

A. By a form tool

B. By setting over the tail stock

C. By a taper turning attachment

D. By swivelling the compound rest