Home
Current Affairs January 2024

What is the correct answer?

4

In centreless grinding, work place centre will be

A. Above the line joining the two wheel centres

B. Below the line joining the two wheel centres

C. On the line joining the two wheel centres

D. At the intersection of the line joining the wheel centres with the work place plane

Correct Answer :

A. Above the line joining the two wheel centres


Related Questions

What is the correct answer?

4

In metal cutting, use of low feeds and high cutting speeds is desired when the objective is

A. High metal removal rate

B. Dry machining

C. Use of soft cutting tool

D. Surface finish

What is the correct answer?

4

The relation between the tool life (T) in minutes and cutting speed (V) in m/min is (where n = An exponent, which depends upon the tool and workpiece, and C = A constant)

A. VnT = C

B. VTn = C

C. Vn/T = C

D. V/Tn = C

What is the correct answer?

4

The shear velocity is the velocity of

A. Tool relative to the workpiece

B. Chip relative to the tool

C. Tool along the tool face

D. None of these

What is the correct answer?

4

Which of the following arc welding processes does not use consumable electrodes?

A. GMAW

B. GTAW

C. Submerged Arc Welding

D. None of these

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

In oblique cutting of metals, the cutting edge of the tool is

A. Perpendicular to the workpiece

B. Perpendicular to the direction of tool travel

C. Parallel to the direction of tool travel

D. Inclined at an angle less than 90° to the direction of tool travel

What is the correct answer?

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

What is the correct answer?

4

The point angle of a drill, for drilling stainless steel, is

A. 90°

B. 118°

C. 135°

D. 150°

What is the correct answer?

4

The process of improving the cutting action of the grinding wheel is called

A. Truing

B. Dressing

C. Facing

D. Clearing

What is the correct answer?

4

The abrasive slurry used in ultrasonic machining contains fine particles of

A. Aluminium oxide

B. Boron carbide

C. Silicon carbide

D. Any one of these

What is the correct answer?

4

A process of removing metal by pushing or pulling a cutting tool is called

A. Up milling

B. Down milling

C. Forming

D. Broaching

What is the correct answer?

4

The tailstock set over required to turn a taper on the entire length of a workpiece having diameters D and d is

A. (D - d)/2L

B. (D - d)/L

C. (D - d)/2

D. D - d

What is the correct answer?

4

The size of a lathe is specified by the

A. Length between centres

B. Swing diameter over the bed

C. Swing diameter over the carriage

D. All of these

What is the correct answer?

4

For fast removal of materials during grinding, a _________ grinding wheel is used.

A. Course grained

B. Fine grained

C. Medium grained

D. None of these

What is the correct answer?

4

The soft grade grinding wheels are denoted by the letters

A. A to H

B. I to P

C. Q to Z

D. A to P

What is the correct answer?

4

The height of each tooth of a broach is

A. Same throughout

B. In progressively decreasing order

C. In progressively increasing order

D. None of these

What is the correct answer?

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

What is the correct answer?

4

A twist drill is a

A. Side cutting tool

B. Front cutting tool

C. End cutting tool

D. None of these

What is the correct answer?

4

In a shaper, the metal is removed during

A. Forward stroke

B. Return stroke

C. Both the forward and return strokes

D. Neither the forward nor the return stroke

What is the correct answer?

4

Side relief angle of a single point tool is the angle

A. By which the face of the tool is inclined towards back

B. By which the face of the tool is inclined sideways

C. Between the surface of the flank immediately below the point and a plane at right angles to the centre line of the point of tool

D. Between the surface of the flank immediately below the point and a line drawn from the point perpendicular to the base

What is the correct answer?

4

It is required to cut screw threads of 2 mm pitch on a lathe. The lead screw has a pitch of 6 mm. If the spindle speed is 60 r.p.m., then the speed of lead screw will be

A. 10 r.p.m.

B. 20 r.p.m.

C. 120 r.p.m.

D. 180 r.p.m.

What is the correct answer?

4

The taper on the lathe spindle is

A. 1 in 10

B. 1 in 15

C. 1 in 20

D. 1 in 30

What is the correct answer?

4

Which of the following statement is correct about hot machining?

A. It requires less power than machining metals at room temperature.

B. The rate of tool wear is lower.

C. It is used for machining high strength and high temperature resistant materials.

D. All of the above

What is the correct answer?

4

Two streams of liquid metal which are not hot enough to fuse properly result into a casting defect known as

A. Cold shut

B. Swell

C. Sand wash

D. Scab

What is the correct answer?

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

What is the correct answer?

4

The cutting speed is maximum while machining __________ with a high speed steel tool.

A. Cast iron

B. Mild steel

C. Brass

D. Aluminium

What is the correct answer?

4

The effect of setting a boring tool above centre height leads to

A. Increase in the effective rake angle and a decrease in the effective clearance angle

B. Increase in both effective rake angle and effective clearance angle

C. Decrease in the effective rake angle and an increase in the effective clearance angle

D. Decrease in both effective rake angle and effective clearance angle

What is the correct answer?

4

Larger end cutting edge angle _________ tool life.

A. Increases

B. Decreases

C. Does not effect

D. None of these

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 operation of making a cone-shaped enlargement of the end of a hole is known as

A. Counter-sinking

B. Counter-boring

C. Trepanning

D. Spot facing