Which of the following is the binding material in cemented carbides___________________?

A. Cobalt
B. Nickel
C. Vanadium
D. Iron

Cemented carbide tools are not found to be suitable for cutting_______________?

A. Brass
B. Cast iron
C. Aluminium
D. Steel

Which is false statement about tempering. Tempering is done to_______________?

A. Improve machinability
B. Improve ductility
C. Improve toughness
D. Release stresses

Vanadium in high speed steels__________________?

A. Promotes decarburisation
B. Provides high hot hardness
C. Forms very hard carbides and thus in-creases wear resistance
D. Promotes retention of austenite

Hardness of lower bainite (tempered martensite) is about________________?

A. Rc 65
B. Rc 48
C. Rc 57
D. Rc 80

Carbon in iron is an example of__________________?

A. Substitutional solution
B. Interstitial solid solution
C. Intermetallic compounds
D. All of the above

Which is false statement about annealing. Annealing is done to________________?

A. Relieve stresses
B. Harden steel slightly
C. Improve machining characteristic
D. Soften material

Hardness of martensite is about___________________?

A. Rc 65
B. Rc 48
C. Rc 57
D. Rc 80

Materials after cold working are subjected to following process to relieve stresses__________________?

A. Hot working
B. Tempering
C. Normalising
D. Annealing

Process of austempering results in__________________?

A. Formation of bainite structure
B. Carburised structure
C. Martenistic structure
D. Lamellar layers of carbide distributed throughout the structure