Home
Current Affairs January 2024

What is the correct answer?

4

If the diameter of the hole is subject to considerable variation, then for locating in jigs and fixtures, the pressure type of locator used is

A. Conical locator

B. Cylindrical locator

C. Diamond pin locator

D. Vee locator

Correct Answer :

A. Conical locator


Related Questions

What is the correct answer?

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

What is the correct answer?

4

The structure of a grinding wheel depends upon

A. Hardness of the material being ground

B. Nature of the grinding operation

C. Finish required

D. All of these

What is the correct answer?

4

In machining metals, surface roughness is due to

A. Feed marks or ridges left by the cutting tool

B. Fragment of built-up edge on the machined surface

C. Cutting tool vibrations

D. All of these

What is the correct answer?

4

In the relation VTn = C, the value of n for ceramic tools is

A. 0.1 to 0.2

B. 0.20 to 0.25

C. 0.25 to 0.40

D. 0.40 to 0.55

What is the correct answer?

4

What is the type of welding defect caused due to shrinkage during solidification and by weld stresses called?

A. Incomplete fusion

B. Lamellar tearing

C. Mismatch

D. Shrinkage void

What is the correct answer?

4

The crystal structure of austenite is

A. Body centred cubic

B. Base centred cubic

C. Hexagonal closed packed

D. Body centred tetragonal

What is the correct answer?

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

What is the correct answer?

4

An important geometrical quantity in the cutting of metals which can be used as a criterion for machinability of metals is

A. Cutting speed

B. Feed rate

C. Shear angle

D. Tool geometry

What is the correct answer?

4

The hardness of a grinding wheel is specified by

A. Brinell hardness number

B. Rockwell hardness number

C. Vickers pyramid number

D. Letter of alphabet

What is the correct answer?

4

Ceramic tools are fixed to tool body by

A. Soldering

B. Brazing

C. Welding

D. Clamping

What is the correct answer?

4

When the cutting edge of the tool is dull, then during machining

A. Continuous chips are formed

B. Discontinuous chips are formed

C. Continuous chips with built-up edge are formed

D. No chips are formed

What is the correct answer?

4

The cutting speed for drilling __________ with high speed steel drills is 24 to 45 m/min.

A. Mild steel

B. Copper

C. Aluminium

D. Brass

What is the correct answer?

4

The rear teeth of a broach

A. Perform burnishing operation

B. Remove minimum metal

C. Remove maximum metal

D. Remove no metal

What is the correct answer?

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

What is the correct answer?

4

Friction at the tool-chip interface can be reduced by

A. Decreasing the rake angle

B. Increasing the depth of cut

C. Decreasing the cutting speed

D. Increasing the cutting speed

What is the correct answer?

4

Hard and tough materials like cast iron should be turned at

A. Slow speed

B. High speed

C. Any speed

D. Certain specific speed

What is the correct answer?

4

The factor which affects the tool life is

A. Tool geometry

B. Cutting speed

C. Feed rate

D. All of these

What is the correct answer?

4

The average cutting speed for turning mild steel with a high speed steel tool is

A. 15 to 19 m/min

B. 25 to 31 m/min

C. 60 to 90 m/min

D. 90 to 120 m/min

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

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 method of grinding used to produce a straight or tapered surface on a workpiece, is

A. Internal cylindrical grinding

B. Form grinding

C. External cylindrical grinding

D. Surface grinding

What is the correct answer?

4

Match the following metal forming processes with their associated stresses in the work piece.
Metal forming processTypes of stress
1. CoiningP. Tensile
2. Wire DrawingQ. Shear
3. BlankingR. Tensile and compressive
4. Deep DrawingS. Compressive

A. 1-S, 2-P, 3-Q, 4-R

B. 1-S, 2-P, 3-R, 4-Q

C. 1-P, 2-Q, 3-S, 4-R

D. 1-P, 2-R, 3-Q, 4-S

What is the correct answer?

4

Trepanning is performed for

A. Finishing a drilled hole

B. Producing a large hole without drilling

C. Truing a hole for alignment

D. Enlarging a drilled hole

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

As tool and work are not in contact in EDM process

A. No relative motion occurs between them

B. No wear of tool occurs

C. No power is consumed during metal cutting

D. No force between tool and work occurs

What is the correct answer?

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

What is the correct answer?

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

What is the correct answer?

4

In metal machining, the work-tool contact zone is a zone where heat is generated due to

A. Plastic deformation of metal

B. Burnishing friction

C. Friction between the moving chip and the tool face

D. None of the above

What is the correct answer?

4

In a planer

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

What is the correct answer?

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