Manufacturing And Production Technology MCQ Questions & Answers

11

The material which on machining produces chips with built up edge is

A) Brittle material B) Tough material C) Hard material D) Ductile material

Discuss

Answer & Solution

Answer: Option D

Solution:

Ductile material Produces Chips with built up edge.
Built up edge (BUE) is an accumulation of material against the rake face, that seizes to the tool tip, separating it from the chip.

12

A 15 mm drilling machine means that it can drill a hole

A) Of maximum diameter 15 mm B) In 15 mm thick plates C) Having cross-sectional area of 15 mm² D) None of these

Discuss

Answer & Solution

Answer: Option A

Solution:

A 15 mm drilling machine means that it can drill a hole of maximum diameter 15 mm.

13

The binding material used in cemented carbide tools is

A) Tungsten B) Chromium C) Silicon D) Cobalt

Discuss

Answer & Solution

Answer: Option D

Solution:

the material that makes up the tools and inserts, is actually grains of tungsten carbide, along with particles of other materials, cemented together using the metal cobalt as a binder. There are several tungsten ores that can be mined and refined into tungsten or made into tungsten carbide

14

In the relation VTⁿ = C, the value of n for carbide 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

Discuss

Answer & Solution

Answer: Option B

Solution:

In Taylor tool life equation as (VTⁿ = c)
V = velocity of the cutting tool (m/min),
T = tool life (min)
c, n,, taylors coeffiecients
The value of n for carbide tools is 0.20 to 0.25

15

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

Discuss

Answer & Solution

Answer: Option D

Solution:

In Taylor tool life equation as (VTⁿ = c)
V = velocity of the cutting tool (m/min),
T = tool life (min)
c, n,, taylors coeffiecients
The value of n for ceramic tools is 0.40 to 0.55

16

For machining a cast iron workpiece by a high speed steel tool, the average cutting speed is

A) 10 m/min B) 15 m/min C) 22 m/min D) 30 m/min

Discuss

Answer & Solution

Answer: Option C

Solution:

For machining a cast iron workpiece by a high speed steel tool, the average cutting speed is 22 m/min and for a mild steel is 30 m/min

17

For machining a mild steel workpiece by a high speed steel tool, the average cutting speed is

A) 5 m/min B) 10 m/min C) 15 m/min D) 30 m/min

Discuss

Answer & Solution

Answer: Option D

Solution:

For machining a cast iron workpiece by a high speed steel tool, the average cutting speed is 22 m/min and for a mild steel is 30 m/min

18

The specific cutting energy used for establishing the machinability of the metal depends upon its

A) Coefficient of friction B) Micro-structure C) Work hardening characteristics D) All of these

Discuss

Answer & Solution

Answer: Option D

Solution:

Specific energy in metal cutting, defined as the energy expended in removing a unit volume of workpiece material. The specific cutting energy used for establishing the machinability of the metal depends upon its - Coefficient of friction -Micro-structure -Work hardening characteristics

19

The cutting speed of a drill depends upon the

A) Material of drill B) Type of material to be drilled C) Quality of surface finish desired D) All of these

Discuss

Answer & Solution

Answer: Option D

Solution:

The cutting speed of a drill depends upon the -Material of drill -Type of material to be drilled - Quality of surface finish desired

20

The size of abrasive grain required in a grinding wheel depends upon the

A) Amount of material to be removed B) Hardness of material being ground C) Finish desired D) All of these

Discuss

Answer & Solution

Answer: Option B

Solution:

The size of Abrasive grain required in a Grinding wheel depends on the amount of material to be removed, desired finishing, and the hardness

Manufacturing And Production Technology MCQ Questions & Answers | Mechanical Engineering