Engineering Materials MCQs

Question 1

Addition of silicon to aluminium results in

Accepted Answer

Improvement of casting characteristics

Answer

Improvement of corrosion resistance

Answer

One of the best known age and precipitation hardening systems

Answer

Improving machinability

Question 2

The hardness of steel primarily depends on

Accepted Answer

Percentage of carbon

Answer

Percentage of alloying elements

Answer

Heat treatment employed

Answer

Shape of carbides and their distribution in iron

Question 3

Beryllium bronze contains

Accepted Answer

97.75% copper and 2.25% beryllium

Answer

60% copper and 40% beryllium

Answer

80% copper and 20% beryllium

Answer

99% copper and 1% beryllium

Question 4

Aluminium bronze contains

Accepted Answer

10% aluminium and 90% copper

Answer

94% aluminium, 4% copper and 0.5% Mn, Mg, Si and Fe

Answer

92.5% aluminium, 4% copper, 2% nickel, and 1.5% Mg

Answer

90% magnesium and 9% aluminium with some copper

Question 5

The ultimate tensile strength and yield strength of most of the metals, when temperature falls from 0 to 100°C will

Accepted Answer

Increase

Answer

Decrease

Answer

Remain same

Answer

First increase and then decrease

Question 6

The percentage of carbon in grey iron castings usually varies between

Accepted Answer

2.5 to 4.5%

Answer

0.5 to 1%

Answer

1.2%

Answer

5 to 7%

Question 7

Dye penetrant method is generally used to locate

Accepted Answer

Surface defects

Answer

Core defects

Answer

Superficial defects

Answer

Temporary defects

Question 8

The material widely used for making pendulums of clocks is

Accepted Answer

Nickel steel

Answer

Stainless steel

Answer

High speed steel

Answer

Heat resisting steel

Question 9

Taps dies and drills contain carbon

Accepted Answer

Above 1%

Answer

Below 0.5%

Answer

Below 1%

Answer

Above 2.2%