Mechanical Engineering MCQs

A. Dipping steel in cyanide bath
B. Reacting steel surface with cyanide salts
C. Adding carbon and nitrogen by heat treatment of steel to increase its surface hardness
D. Obtaining cyanide salts

A. 600 VPN
B. 1500 VPN
C. 1000 to 1100 VPN
D. 250 VPN

A. Cast iron
B. Mild steel
C. Stainless steel
D. Wrought iron

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

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

A. aluminium
B. tin
C. zinc
D. lead

A. In which atoms align themselves in a geometric pattern upon solidification
B. In which there is no definite atomic structure and atoms exist in a random pattern just as in a liquid
C. Which is not attacked by phosphorous
D. Which emits fumes on melting

A. Refine grain structure
B. Reduce segregation in casting
C. Improve mechanical properties
D. Induce stresses-

A. Electroplating
B. Cyaniding
C. Induction hardening
D. Nitriding

A. Zinc
B. Lead
C. Silver
D. Glass