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4

An expendable pattern is used in

A. Slush casting

B. Squeeze casting

C. Centrifugal casting

D. Investment casting

Correct Answer :

D. Investment casting


Related Questions

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4

The rear teeth of a broach

A. Perform burnishing operation

B. Remove minimum metal

C. Remove maximum metal

D. Remove no metal

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4

In drilling aluminium, a drill with

A. Zero helix angle is used

B. Low helix angle is used

C. High helix angle is used

D. Any helix angle can be used

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4

The factor responsible for the formation of discontinuous chips is

A. Low cutting speed and large rake angle

B. Low cutting speed and small rake angle

C. High cutting speed and large rake angle

D. High cutting speed and small rake angle

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4

A shaft has a dimension, φ9 +0.025⁺⁰⁰⁰⁹, the respective values of fundamental deviation and tolerance are

A. - 0.025, ±0.008

B. - 0.025, 0.016

C. - 0.009, ± 0.008

D. - 0.009, 0.016

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4

The factor which affects the tool life is

A. Tool geometry

B. Cutting speed

C. Feed rate

D. All of these

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4

In _________ operation, the chip thickness is minimum at the beginning of the cut and it reaches to the maximum when the cut terminates.

A. Conventional milling

B. Climb milling

C. Face milling

D. End milling

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4

The lip clearance angle is the angle formed by the

A. Leading edge of the land with a plane having the axis of the drill

B. Flank and a plane at right angles to the drill axis

C. Chisel edge and the lip as viewed from the end of a drill

D. None of the above

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4

A hole is of dimension φ = 9 ₊0⁺⁰⁰¹⁵ mm. The corresponding shaft is of dimension φ = 9 ₊0.001⁺⁰⁰¹⁰ mm. The resulting assembly has

A. Loose running fit

B. Close running fit

C. Transition fit

D. Interference fit

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4

Gears can be best produced on mass production by

A. Shaping

B. Casting

C. Forming

D. Hobbing

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4

Larger than 15° side cutting edge angle

A. Increases tool life

B. Decreases tool life

C. Produces chipping and decreases tool life

D. Results in excessive stress concentration and greater heat generation

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4

Drilling is an example of

A. Orthogonal cutting

B. Oblique cutting

C. Simple cutting

D. Uniform cutting

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4

In electro discharge machining, tool is made of

A. Brass

B. Copper

C. Copper tungsten alloy

D. All of these

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4

Misrun is a casting defect which occurs due to

A. Very high pouring temperature of the metal

B. Insufficient fluidity of the molten metal

C. Absorption of gases by the liquid metal

D. Improper alignment of the mould flasks

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4

The lead screw of a lathe has _________ threads.

A. Single start

B. Double start

C. Multi-start

D. Any one of these

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4

In reaming process

A. Metal removal rate is high

B. High surface finish is obtained

C. High form accuracy is obtained

D. High dimensional accuracy is obtained

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4

Internal gear cutting operation can be performed by

A. Milling

B. Shaping with rack cutter

C. Shaping with pinion cutter

D. Hobbing

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4

The operation of producing grooves around the periphery of a cylindrical or conical workpiece is called

A. Profile milling

B. Gang milling

C. Saw milling

D. Helical milling

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4

The ductile materials, during machining, produce

A. Continuous chips

B. Discontinuous chips

C. Continuous chips with built up edge

D. Either (A) or (C)

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4

The mechanism of material removal in EDM process is

A. Melting and Evaporation

B. Melting and Corrosion

C. Erosion and Cavitations

D. Cavitations and Evaporation

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4

In machining metals, chips break due to __________ of work material.

A. Toughness

B. Ductility

C. Elasticity

D. Work hardening

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4

Which of the following statement is correct about EDM machining?

A. It can machine hardest materials.

B. It produces high degree of surface finish.

C. The tool and work are never in contact with each other.

D. All of these

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4

Which type of motor is not used in axis or spindle drives of CNC machine tools?

A. Induction motor

B. DC servo motor

C. Stepper motor

D. Linear servo motor

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4

The abrasive recommended for grinding materials of low tensile strength is

A. Silicon carbide

B. Aluminium oxide

C. Sand stone

D. Diamond

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4

In oblique cutting system, the maximum chip thickness

A. Occurs at the middle

B. May not occur at the middle

C. Depends upon the material of the tool

D. Depends upon the geometry of the tool

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4

Glazing in grinding wheels can be decreased by

A. Using a harder wheel or by increasing the wheel speed

B. Using a softer wheel or by decreasing the wheel speed

C. Using a harder wheel or by decreasing the wheel speed

D. Using a softer wheel or by increasing the wheel speed

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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

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4

A dynamometer is a device used for the measurement of

A. Chip thickness ratio

B. Forces during metal cutting

C. Wear of the cutting tool

D. Deflection of the cutting tool

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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

The usual value of the point angle of a drill is

A. 70°

B. 100°

C. 118°

D. 130°

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4

What is the method of brazing used to join relatively small assemblies made from materials that either do not oxidize at the brazing temperature or can be protected from oxidation with a flux?

A. Torch brazing

B. Dip brazing

C. Resistance brazing

D. Furnace brazing