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MP Sub-Engineer ME: Testing of Materials Quiz 20

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Question 1

The impact strength of a material is an index of its _______.

Question 2

The “Jominy test” is used to find

Question 3

Match list-I with List-II and select the correct answer using the codes given below the list:

List –I

(Material properties)

A) Ductility

B) Toughness

C) Endurance limit

D) Resistance to penetration

List-II

(Test to determine properties)

1) Impact test

2) Fatigue test

3) Tension test

4) Hardness test

Question 4

Which one of the following pairs of tests has been developed to evaluate the fracture resistance of engineering materials, subjected to dynamic loads or impacts?

Question 5

A hypothetical engineering stress-strain curve shown in the figure has three straight lines PQ, QR, RS with coordinates P(0,0), Q(0.2,100), R(0.6,140) and S(0.8,130). 'Q' is the yield point, 'R' is the UTS point and 'S' the fracture point.

The toughness of the material [in MJ/m³] is __________

Question 6

In a hardness test, L is load in kg, D is diameter of ball in mm and d is diameter of indentation in mm. Brinell Hardness Number is expressed by the equation

Question 7

In the Charpy impact test, the specimen is held between how many grips?

Question 8

Percentage elongation measured during tensile testing indicates _____.

Question 9

While loading, _______ material undergoes fracture after large amount of deformation.

Question 10

The property of the material to regain its original shape after deformation when the external forces are removed is called_______________ .

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AE & JE Exams Mechanical Engineering

Jul 11AE & JE Exams