Materials Science and Manufacturing Engineering Miscellaneous Easy Questions and Answers | Page - 122

Materials Science and Manufacturing Engineering Miscellaneous

Deep hole drilling of small diameter, say 0.2 mm is done with EDM by selecting the tool material as

1. Copper wire
1. Tungsten wire
1. Brass wire
1. Tungsten carbide

View Hint View Answer Discuss in Forum

Tungsten wire has very high melting point so it is more suitable.

Correct Option: B

Tungsten wire has very high melting point so it is more suitable.

Choose the correct statement

1. Fixture is to guide the tool as well as to locate and clamp the work piece
1. Jig is to guide the tool as well as to locate and clamp the work piece
1. Jigs are used on CNC machines to locate and clamp the workpiece and guide the tool
1. No arrangement to guide the tool is provided in jig
1. Option B and C

View Hint View Answer Discuss in Forum

In jigs provision for guiding tool is there along with locating and clamping arrangement for workpiece while fixture are for locating and clamping workpiece only.

Correct Option: E

In jigs provision for guiding tool is there along with locating and clamping arrangement for workpiece while fixture are for locating and clamping workpiece only.

In EDM, the tool is made of

1. Copper
1. HSS
1. Cast iron
1. Plain carbon

View Hint View Answer Discuss in Forum

Tool required for EDM should be made of conductive material like cu, graphite etc.

Correct Option: A

Tool required for EDM should be made of conductive material like cu, graphite etc.

Match the following lists

List-I	List-II
A. Aluminium brake shoe	1. Deep drawing
B. Plastic water bottles	2. Blow moulding
C. Stainless steel cups	3. Centrifugal casting
D. Soft drink can (aluminum)	4. Impact extrusion
	5. Sand casting
	6.Upset forging

1. A - 1 , B - 3, C - 2 , D - 5
1. A - 5 , B - 2, C - 4 , D - 3
1. A - 5 , B - 1, C - 3, D - 4
1. A - 5 , B - 2, C - 1 , D - 4

View Hint View Answer Discuss in Forum

a. Aluminium brake shoe – sand casting b. Plastic water bottles. – Blow moulding c. Stainless steel cups – Deep drawing d. Soft drink can – Impact extrusion.

Correct Option: D

a. Aluminium brake shoe – sand casting b. Plastic water bottles. – Blow moulding c. Stainless steel cups – Deep drawing d. Soft drink can – Impact extrusion.

Match the following lists
List-I List-II
A. ECM 1. Plastic shear
B. EDM 2. Erosion/brittle fracture
C. USM 3. Corrosive reaction
D. LBM 4. Melting vaporization
5. lon displaeement
6.Plastic shear and ion displacement

1. A - 5 , B - 3, C - 2 , D - 4
1. A - 5 , B - 1, C - 4 , D - 3
1. A - 1 , B - 5, C - 2 , D - 4
1. A - 4 , B - 3, C - 2 , D - 1

View Hint View Answer Discuss in Forum

ECM – Ion displacement. EDM – Corrosive reaction. USM – Erosion/ brittle fracture. LBM – Melting vaporization

Correct Option: A

ECM – Ion displacement. EDM – Corrosive reaction. USM – Erosion/ brittle fracture. LBM – Melting vaporization