Engineering Materials MCQ Questions & Answers | Mechanical Engineering

A. Copper and zinc

B. Copper and tin

C. Copper, tin and zinc

D. None of these

A. Make the steel tougher and harder

B. Raise the yield point

C. Make the steel ductile and of good bending qualities

D. All of the above

A. 0.05%

B. 0.15%

C. 0.3%

D. 0.5%

A. Linear

B. Nonlinear

C. Plastic

D. No fixed relationship

A. Manganese

B. Magnesium

C. Nickel

D. Silicon

A. Heated from 30°C to 50°C above the upper critical temperature and then cooled in still air

B. Heated from 30°C to 50°C above the upper critical temperature and then cooled suddenly in a suitable cooling medium

C. Heated from 30°C to 50°C above the upper critical temperature and then cooled slowly in the furnace

D. Heated below or closes to the lower critical temperature and then cooled slowly

A. Heated from 30°C to 50°C above the upper critical temperature and then cooled in still air

B. Heated from 30°C to 50°C above the upper critical temperature and then cooled suddenly in a suitable cooling medium

C. Heated from 30°C to 50°C above the upper critical temperature and then cooled slowly in the furnace

D. Heated below or closes to the lower critical temperature and then cooled slowly

A. 30° C to 50° C above upper critical temperature

B. 30° C to 50° C below upper critical temperature

C. 30° C to 50° C above lower critical temperature

D. 30° C to 50° C below lower critical temperature

A. 3.5 to 4.5% copper, 0.4 to 0.7% magnesium, 0.4 to 0.7% manganese and rest aluminium

B. 3.5 to 4.5% copper, 1.2 to 1.7% manganese, 1.8 to 2.3% nickel, 0.6% each of silicon, magnesium and iron, and rest aluminium

C. 4 to 4.5% magnesium, 3 to 4% copper and rest aluminium

D. 5 to 6% tin, 2 to 3% copper and rest aluminium

A. 63 to 67% nickel and 30% copper

B. 88% copper, 10% tin and rest zinc

C. Alloy of tin, lead and cadmium

D. Iron scrap and zinc