ISRO Mechanical Engg. : Strength of Materials Booster Quiz 4

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Question 1

For a body subjected to direct stresses ,and the direct strain in x direction is (where and are Young’s Modulus and Poisson’s ratio respectively)

• A
• B
• C
• D

Question 2

A bar of Length L, area A and Young’s modulus E is subjected to a pulling force P. The strain energy stored in the bar is

• A
• B
• C
• D

Question 3

Two heavy rotating masses are connected by shafts of length l₁, l_2, and l₃ and the corresponding diameters are d1, d2 and d3. The system is reduced to a torsionally equivalent the length of the shafts having diameter d1 is

• A
• B
• C
• Dl₁+l₂ +l₃

Question 4

A wire has a mass (0.3 ± 0.003) g, radius (0.5 ± 0.005) mm and length (6 ± 0.06) cm. The maximum percentage error in the measurement of density is

• A13
• B3.1
• C1.3
• D4

Question 5

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

• A
• B
• C
• D

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