Manufacturing And Production Technology MCQ Questions & Answers

51

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

Discuss

Answer & Solution

Answer: Option D

Solution:

The machinability rating is determined by measuring the weighed averages of the normal cutting speed, surface finish, and tool life for each material. The factor considered for evaluation of machinability is - Cutting forces and power consumption - Tool life -Type of chips and shear angle

52

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

Discuss

Answer & Solution

Answer: Option A

Solution:

When the temperature of a solid metal increases, its intramolecular bonds are brake and strength of solid metal decreases. Due to decrease its strength, the elongation of the metal increases, when we apply the load i.e. ductility increases

53

In lapping operation, the amount of metal removed is

A) 0.005 to 0.01 mm B) 0.01 to 0.1 mm C) 0.05 to 0.1 mm D) 0.5 to 1 mm

Discuss

Answer & Solution

Answer: Option A

Solution:

In lapping operation, the amount of metal removed is 0.005 to 0.01 mm

54

In metal machining, the zone where the maximum heat is generated due to the plastic deformation of metal, is called

A) Friction zone B) Work-tool contact zone C) Shear zone D) None of these

Discuss

Answer & Solution

Answer: Option C

Solution:

The narrow zone surrounding the shear plane in machining is termed as primary shear zone. The area surrounding the chip-tool contact region is called the secondary deformation zone. This zone consists of a part of work material (uncut chip) and a part of chip.

55

Which of the following operations can be performed with milling cutters?

A) Cutting key ways on shafts B) Cutting external screw threads C) Cutting teeth of spur gears D) All of these

Discuss

Answer & Solution

Answer: Option D

Solution:

In this operation, surfaces which are at an angle to the axis of the cutter, is machined by the rotary cutter. -Milling machine can perform all other common operations like turning, facing, fillet making, chamfering, drilling, gear cutting, planning, slot cutting.

56

Volume of a cube of side ‘$$l$$’ and volume of a sphere of radius ‘r’ are equal. Both the cube and the sphere are solid and of same material. They are being cast. The ratio of the solidification time of the cube to the same of the sphere is

A) $${\left( {\frac{{4\pi }}{6}} \right)^3}{\left( {\frac{{\text{r}}}{l}} \right)^6}$$ B) $$\left( {\frac{{4\pi }}{6}} \right){\left( {\frac{{\text{r}}}{l}} \right)^2}$$ C) $${\left( {\frac{{4\pi }}{6}} \right)^2}{\left( {\frac{{\text{r}}}{l}} \right)^3}$$ D) $${\left( {\frac{{4\pi }}{6}} \right)^2}{\left( {\frac{{\text{r}}}{l}} \right)^4}$$

Discuss

Answer & Solution

Answer: Option D

No explanation is given for this question. Let's Discuss on Board

57

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

Discuss

Answer & Solution

Answer: Option C

Solution:

-The maximum production of small and slender parts is done by Multi-spindle automatic lathe -Multi Spindle Automatic Lathe can provide the various types of machining such as boring, turning, chamfering, threading, grooving.

58

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

Discuss

Answer & Solution

Answer: Option C

Solution:

End-feed grinding is a technique used in machining when working with a centerless grinder. A centerless grinder is a machine that has two wheels through which a material is placed in order to shaped and ground. This allows a faster rate of work because pieces can be more quickly engaged and disengaged from the process, and of its two wheels, one is a grinding wheel, and the other is a regulating wheel.

59

In a milling operation, two side milling cutters are mounted with a desired distance between them so that both sides of a workpiece can be milled simultaneously. This set up is called

A) Gang milling B) Straddle milling C) String milling D) Side milling

Discuss

Answer & Solution

Answer: Option B

No explanation is given for this question. Let's Discuss on Board

60

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

A) Drill remover B) Drill puller C) Drift D) Drill drawer

Discuss

Answer & Solution

Answer: Option C

Solution:

A drift is a tool used to withdraw a drill from the sleeve or spindle in drilling machines.

It is a tapered, flat, and elongated tool that fits into the slot provided in the drill sleeve or spindle.

When inserted and struck with a hammer, it forces the drill or taper shank tool out of the spindle or sleeve.

Drifts are commonly used in machines like drill presses, lathes, and milling machines where taper shank tools are used.

This tool ensures easy and safe removal of drills without causing damage to the spindle or tool.

Manufacturing And Production Technology MCQ Questions & Answers | Mechanical Engineering