D:-T + d (0.8 ~ 1.2)
Correct Answer:- Option-D
Question76:-The furnace used to manufacture pig iron is
A--Crucible furnace
B:-Blast furnace
C:-Cupola furnace
D:-Pudding furnace
Correct Answer:- Option-B
Question77:-The percentage of carbon contains in mild steel is
A:-0.5-0.8
B:-0.15-0.3
C:-0.4-0.6
D:-More than 1
Correct Answer:- Option-B
Question78:-The purpose of normalizing is to
A:-Remove the induced stresses
B:-Ilmprove machineability
C:-Soften the steel
D:-Improve ductility and toughness
Correct Answer:-Question Cancelled
Question79:-To reduce internal stresses of a hardened tool, the method of heat treatment generally applied 15
A:-Stabilizing
B:-Annealing
C:-Normalizing
D:-Tempering
Correct Answer:-Question Cancelled
Question80:-Heat treatment of metal is necessary
A:-To produce certain desired properties
B:-To make good appearance of compound
:-To increase strength of the metal
D:-To make the metal rust proof
Correct Answer:- Option-A
Question81:-Which marking media is applied on rough forgings and castings?
A:-White wash
-Prussian blue
C:-Copper sulphate
D:-Cellulose lacquer
Correct Answer:- Option-A
Question82:-Fullers are used for
A:-Necking and grooving
-Forging the head of rivets, bolts, etc.
C:-making shoulders with right angles
D:-Upsetting
Correct Answer:- Option-A
Question83:-Which property can be increased in copper by cold forging?
A:-Ductility
B:-Malleability
C:-Tensile stress
D:-Elasticity
Correct Answer:- Option-C
Question84:-Which one of the following is the function of the tuyers in the forge?
A--Permits cooled air
B:-Controls smokes and sparks
C:-Act as an outlet of products of combustion
D:-To clean the forge
Correct Answer:-Question Cancelled
Question85:-The process of decreasing the length of the job in forging
A:-Drawing out
B:-Jumping