Engineering Materials MCQs

Question 1

The presence of hydrogen in steel causes

Accepted Answer

Embrittlement

Answer

Reduced neutron absorption cross-section

Answer

Improved Weldability

Answer

Corrosion resistance

Question 2

Maximum percentage of carbon in austenite is

Accepted Answer

1.7%

Answer

0.025%

Answer

0.26%

Answer

0.8%

Question 3

The hardness and tensile strength in austenitic stainless steel can be increased by

Accepted Answer

Hardening and cold working

Answer

Normalizing

Answer

Martempering

Answer

Full annealing

Question 4

Machining properties of steel are improved by adding

Accepted Answer

Sulphur, lead, phosphorous

Answer

Silicon, aluminium, titanium

Answer

Vanadium, aluminium

Answer

Chromium, nickel

Question 5

The machinability of steel is improved by adding

Accepted Answer

Sulphur, lead and phosphorus

Answer

Nickel

Answer

Chromium

Answer

Nickel and chromium

Question 6

Nodular cast iron is produced by adding ________ to the molten cast iron.

Accepted Answer

Magnesium

Answer

Nickel

Answer

Chromium

Answer

Copper

Question 7

Addition of manganese to aluminium results in

Accepted Answer

Improvement of corrosion resistance

Answer

Improvement of casting characteristics

Answer

One of the best known age and precipitation hardening systems

Answer

Improving machinability

Question 8

Addition of copper to aluminium results in

Accepted Answer

One of the best known age and precipitation hardening systems

Answer

Improvement of casting characteristics

Answer

Improvement of corrosion resistance

Answer

Improving machinability

Question 9

Addition of lead and bismuth to aluminium results in

Accepted Answer

Improving machinability

Answer

Improvement of casting characteristics

Answer

Improvement of corrosion resistance

Answer

One of the best known age and precipitation hardening systems