Home
Current Affairs January 2024

What is the correct answer?

4

The method of centre less grinding used to produce taper is

A. In-feed grinding

B. Through feed grinding

C. End feed grinding

D. Any one of these

Correct Answer :

C. End feed grinding


Related Questions

What is the correct answer?

4

In hot machining, tool is made of

A. Tungsten carbide

B. Brass or copper

C. Diamond

D. Stainless steel

What is the correct answer?

4

Which of the following operation is first performed?

A. Spot facing

B. Boring

C. Tapping

D. Drilling

What is the correct answer?

4

The surface finish is improved by the increase in

A. Cutting speed

B. Nose radius

C. True rake angle

D. All of these

What is the correct answer?

4

If the cutting speed is increased, then the built-up-edge

A. Becomes longer

B. May or may not form

C. Becomes smaller and finally does not form at all

D. Has nothing to do with speed

What is the correct answer?

4

The process of changing the shape of grinding wheel as it becomes worn due to breaking away of the abrasive and bond, is called

A. Truing

B. Dressing

C. Facing

D. Clearing

What is the correct answer?

4

Two 1 mm thick steel sheets are to be spot welded at a current of 5000 A. Assuming effective resistance to be 200 μm and current flow time of 0.2 second, heat generated during the process will be

A. 0.2 Joule

B. 1 Joule

C. 5 Joule

D. 1000 Joule

What is the correct answer?

4

The cutting speed for counter-boring should be _________ that of drilling operation.

A. Equal to

B. Less than

C. Greater than

D. None of these

What is the correct answer?

4

The maximum production of small and slender parts is done by

A. Watch maker's lathe

B. Sliding head stock automatic lathe

C. Multi-spindle automatic lathe

D. Capstan lathe

What is the correct answer?

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

What is the correct answer?

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

What is the correct answer?

4

Which of the following statement is correct regarding grinding of high carbon steel?

A. Grinding at high speed results in the reduction of chip thickness and cutting forces per grit.

B. Aluminium oxide wheels are employed.

C. The grinding wheel has to be of open structure.

D. All of the above

What is the correct answer?

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

What is the correct answer?

4

The maximum possible draft in cold rolling of sheet increases with the

A. Increase in coefficient of friction

B. Decrease in coefficient of friction

C. Decrease in roll radius

D. Decrease in roll velocity

What is the correct answer?

4

The chuck used for setting up of heavy and irregular shaped work should be

A. Four jaw independent chuck

B. Three jaw universal chuck

C. Magnetic chuck

D. Drill chuck

What is the correct answer?

4

Any number of equal divisions can be obtained on milling machine by

A. Direct indexing

B. Simple indexing

C. Compound indexing

D. Differential indexing

What is the correct answer?

4

The factor considered for evaluation of machinability is

A. Cutting forces and power consumption

B. Tool life

C. Type of chips and shear angle

D. All of these

What is the correct answer?

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°

What is the correct answer?

4

During the execution of a CNC part program block NO20 GO2 X45.0 Y25.0 R5.0 ; the type of tool motion will be

A. Circular Interpolation − clockwise

B. Circular Interpolation − counter clockwise

C. Linear Interpolation

D. Rapid feed

What is the correct answer?

4

A __________ grinding wheel is used to grind soft materials.

A. Course grained

B. Medium grained

C. Fine grained

D. None of these

What is the correct answer?

4

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

What is the correct answer?

4

The enlarging of an existing circular hole with a rotating single point tool is called

A. Boring

B. Drilling

C. Reaming

D. Internal turning

What is the correct answer?

4

Two plates of the same metal having equal thickness are to be butt welded with electric arc. When the plate thickness changes, welding is achieved by

A. Adjusting the current

B. Adjusting the duration of current

C. Changing the electrode size

D. Changing the electrode coating

What is the correct answer?

4

In order to grind soft material

A. Coarse grained grinding wheel is used

B. Fine grained grinding wheel is used

C. Medium grained grinding wheel is used

D. Any one of these

What is the correct answer?

4

When 3-2-1 principle is used to support and locate a three dimensional work-piece during machining, the number of degrees of freedom that are restricted is

A. 7

B. 8

C. 9

D. 10

What is the correct answer?

4

The tool life in case of a grinding wheel is the time

A. Between two successive regrinds of the wheel

B. Taken for the wheel to be balanced

C. Taken between two successive wheel dressings

D. Taken for a wear of 1 mm on its diameter

What is the correct answer?

4

The rake angle required to machine brass by high speed steel tool is

A.

B. 10°

C. 20°

D. 100°

What is the correct answer?

4

The grade of grinding wheel depends upon

A. Hardness of the material being ground

B. Speed of wheel and work

C. Condition of grinding machine

D. All of these

What is the correct answer?

4

A tool used to withdraw a drill from the sleeve is called

A. Drill remover

B. Drill puller

C. Drift

D. Drill drawer

What is the correct answer?

4

In up milling, the thickness of chip is

A. Minimum at the beginning of the cut and maximum at the end of the cut

B. Maximum at the beginning of the cut and minimum at the end of the cut

C. Uniform throughout the cut

D. None of these

What is the correct answer?

4

Small nose radius

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