‘AcAluminium alloy
B:-Copper and lead alloy
C-Cadmium based alloy
D-Sintered alloy
Correct Answer:- Option-C

‘QuestionS1:-The process which helps in producing a fine grain for uniformity of structure and for improved mechanical properties is known as

AsTempering
B:-Annealing
C+Hardening

D:-Normalizing
Correct Answer:- Option-D
Question52::Which one of the following is an alloy of carbon and iron in which carbon in combined state 7
AcSteel
B:-Wrought iron
‏وع‎ iron
Dig iron
Correct Answer:- Option-é
QuestionS3:-Carbon dissolved in the iron to form a solid solution is called
‘A-Cementite
B:-Ferrite
ടി
D-Austenite
Correct Answer:- Option ®
QuestionS4:-f the hot stee! is the cooled rapidly the austenite changed in to @ new structure called Martensite which property of steel is increase
‘Ac Hardness
B:-Ductility
C-Malleabilty
D-Brittleness
Correct Answer:- Option-é
QuestionS5::Which cast iron has the ability to reduce vibration and tool chattering in machine tools ?
AcGrey cast iron
B:-White cast iron
C:-Nodular cast iron
D-Malleable cast iron
Correct Answer:- Option-é
QuestionS6::What is the name of heat treatment process for reheating the hardened steel to a temperature below 400 degree centigrade followed by cooling ?
‘AcAnnealing
B:-Hardening
= 1
D:-Normalizing
Correct Answer:- Option-C
QuestionS7:-Why tempering process is carried out in
‘Aco add cutting ability
B:To relieve stress and strain
(C= refine the grain structure
Do regulate the hardness and toughness
Correct Answer:- Option-D
QuestionS8::What is the purpose of brine solution, water, oil and air used in heat treatment process ?
AcSoaking

B:-Quenching