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In plunge grinding

A. The work is reciprocated as the wheel feeds to produce cylinders longer than the width of wheel face

B. The work rotates in a fixed position as the wheel feeds to produce cylinders equal to or shorter than the width of wheel face

C. The work is reciprocated as the wheel feeds to produce cylinders shorter than the width of wheel face

D. The work rotates in a fixed position as the wheel feeds to produce cylinders longer than the width of wheel face

Correct Answer :

B. The work rotates in a fixed position as the wheel feeds to produce cylinders equal to or shorter than the width of wheel face


Related Questions

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The drill spindles are provided with standard taper known as

A. Morse taper

B. Seller's taper

C. Chapman taper

D. Brown and Sharpe taper

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4

If the flame of the welding torch is directed towards the progress of welding, then what will you call the welding technique?

A. Forehand welding

B. Flux cored ARC welding

C. Electro slag welding

D. Pulsed spray welding

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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 different spindle speeds on a lathe form

A. Arithmetical progression

B. Geometrical progression

C. Harmonical progression

D. Any one of these

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4

The operation performed on a shaper is

A. Machining horizontal surface

B. Machining vertical surface

C. Machining angular surface

D. All of these

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4

The obtuse angle, included between the chisel edge and the lip as viewed from the end of a drill, is called

A. Helix or rake angle

B. Point angle

C. Chisel edge angle

D. Lip clearance angle

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4

Which of the following statement is correct for oblique cutting system?

A. The cutting edge is inclined at an angle less than 90° with the normal to the velocity of the tool.

B. Frequently, more than one cutting edges are in action.

C. The chip flows on the tool face at an angle less than 90° with the normal on the cutting edge.

D. All of the above

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4

The process of removing metal by a cutter which is rotated in the same direction of travel of workpiece, is called

A. Up milling

B. Down milling

C. Face milling

D. End milling

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4

If the tearing efficiency of a riveted joint is 50%, then ratio of rivet hole diameter to the pitch of rivets is

A. 0.20

B. 0.30

C. 0.50

D. 0.60

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4

Crater wear is predominant in

A. Carbon tool steels

B. Tungsten carbide tools

C. High speed steel tools

D. Ceramic tools

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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 cutting force in punching and blanking operations mainly depends on

A. The modulus of elasticity of metal

B. The shear strength of metal

C. The bulk modulus of metal

D. The yield strength of metal

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4

In a shaper

A. Tool is stationary and work reciprocates

B. Work is stationary and tool reciprocates

C. Tool moves over stationary work

D. Tool moves over reciprocating work

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4

The carbide tools operating at very low cutting speeds (below 30 m/min)

A. Reduces tool life

B. Increases tool life

C. Have no effect on tool life

D. Spoils the work piece

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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 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

Gear lapping is an operation

A. After heat treatment

B. Prior to heat treatment

C. For gear reconditioning

D. None of these

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4

Which of the following statement is correct in regard to centreless grinding?

A. The workpiece is supported throughout its entire length as grinding takes place.

B. It is a continuous process and adopted for production work.

C. It requires no holding device for the work.

D. All of the above

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4

The correct sequence of the following parameters in order of their maximum to minimum influence on tool life is

A. Feed rate, depth of cut, cutting speed

B. Depth of cut, cutting speed, feed rate

C. Cutting speed, feed rate, depth of cut

D. Feed rate, cutting speed, depth of cut

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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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Which of the following statement is wrong?

A. The diamond is the hardest tool material and can run at cutting speeds about 50 times that of high speed steel tool.

B. The ceramic tools can be used at cutting speeds 40 times that of high speed steel tools.

C. The cemented carbide tools can be used at cutting speeds 10 times that of high speed steel tools.

D. The ceramic tools can withstand temperature upto 600°C only.

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4

The hardness of a grinding wheel is determined by the

A. Hardness of abrasive grains

B. Ability of the bond to retain abrasives

C. Hardness of the bond

D. Ability of the grinding wheel to penetrate the work piece

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4

A drill bit of 20 mm diameter rotating at 500 r.p.m. with a feed rate of 0.2 mm/revolution is used to drill a through hole in a mild steel plate 20 mm thickness. The depth of cut in this drilling operation is

A. 0.2 mm

B. 10 mm

C. 20 mm

D. 100 mm

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4

Lapping is an operation of

A. Making a cone-shaped enlargement of the end of a hole

B. Smoothing and squaring the surface around a hole

C. Sizing and finishing a small diameter hole

D. Producing a hole by removing metal along the circumference of a hollow cutting tool

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4

A drill considered as a cutting tool having zero rake, is known as a

A. Flat drill

B. Straight fluted drill

C. Parallel shank twist drill

D. Tapered shank twist drill

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4

When two main plates are kept in alignment butting each other and riveted with cover plate on both sides of the main plates with two rows of rivets in each main plate, the joint is known as _______ double cover butt joint.

A. Single riveted

B. Double riveted

C. Both (A) and (B)

D. None of these

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4

The grinding operation is a

A. Shaping operation

B. Forming operation

C. Surface finishing operation

D. Dressing operation

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4

Which of the following statement is wrong about ultrasonic machining?

A. It is best suited for machining hard and brittle materials

B. It cuts materials at very slow speeds

C. It removes large amount of material

D. It produces good surface finish

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In order to obtain a surface finish in the range of 0.75 μm to 1.25 μm , the operation used is called.

A. Grinding

B. Lapping

C. Honing

D. Buffing

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In a plain milling machine, the table can be moved

A. Longitudinally

B. Crosswise

C. Vertically

D. All of these