Engineering Materials MCQs

Question 1

Ductility of a material can be defined as

Accepted Answer

Ability to undergo large permanent deformations in tension

Answer

Ability to undergo large permanent deformations in compression

Answer

Ability to recover its original form

Answer

All of the above

Question 2

Malleability of a material can be defined as

Accepted Answer

Ability to undergo large permanent deformations in compression

Answer

Ability to recover its original form

Answer

Ability to undergo large permanent deformations in tension

Answer

All of the above

Question 3

The ability of a material to absorb energy in the plastic range is called

Accepted Answer

Toughness

Answer

Resilience

Answer

Creep

Answer

Fatigue strength

Question 4

Muntz metal contains copper and zinc in the ratio of

Accepted Answer

60 : 40

Answer

50 : 50

Answer

40 : 60

Answer

20 : 80

Question 5

Bronze alloy contains

Accepted Answer

88% copper and 12% tin

Answer

70% copper and 30% zinc

Answer

85 - 92% copper and rest tin with little lead and nickel

Answer

70 - 75% copper and rest tin

Question 6

Which of the following statement is true about brittle fracture?

Accepted Answer

Many metals with hexagonal close packed (H.C.P) crystal structure commonly show brittle fracture

Answer

High temperature and low strain rates favour brittle fracture

Answer

Brittle fracture is always preceded by noise

Answer

Cup and cone formation is characteristic for brittle materials

Question 7

Brass contains

Accepted Answer

70% copper and 30% zinc

Answer

90% copper and 10% tin

Answer

85 - 92% copper and rest tin with little lead and nickel

Answer

70 - 75% copper and rest tin

Question 8

Pick up wrong statement about wrought iron

Accepted Answer

It is made by adding suitable percentage of carbon to molten iron and subjecting the product to repeated hammering and rolling

Answer

It contains carbon of the order of 0 to 0.25%

Answer

It melts at 1535°C

Answer

It is very soft and ductile

Question 9

Maximum percentage of carbon in ferrite is

Accepted Answer

0.025%

Answer

0.06%

Answer

0.1%

Answer

0.25%