Impact Loading MCQ Questions & Answers

Impact Loading MCQs : This section focuses on the "Impact Loading". These Multiple Choice Questions (MCQs) should be practiced to improve the Impact Loading skills required for various interviews (campus interview, walk-in interview, company interview), placement, entrance exam and other competitive examinations.

Question 1

A load of 100N falls through a height of 2cm onto a collar rigidly attached to the lower end of a vertical bar 1.5m long and of 105cm2 cross- sectional area. The upper end of the vertical bar is fixed. What is the maximum instantaneous elongation in the vertical bar if E = 200GPa?

A. 0.245mm

B. 0.324mm

C. 0.452mm

D. 0.623mm

Question 2

A load of 100N falls through a height of 2cm onto a collar rigidly attached to the lower end of a vertical bar 1.5m long and of 105cm2 cross- sectional area. The upper end of the vertical bar is fixed. What is the maximum instantaneous stress induced in the vertical bar if E = 200GPa?

A. 50.87 N/mm2

B. 60.23 N/mm2

C. 45.24 N/mm2

D. 63.14 N/mm2

Question 3

A load of 100N falls through a height of 2cm onto a collar rigidly attached to the lower end of a vertical bar 1.5m long and of 105cm2 cross- sectional area. The upper end of the vertical bar is fixed. What is the strain energy stored in the vertical bar if E = 200GPa?

A. 2.045 N-m

B. 3.14 N-m

C. 9.4 N-mm

D. 2.14 N-m

Question 4

A weight of 10kN falls by 30mm on a collar rigidly attached to a vertical bar 4m long and 1000mm2 in section. What will be the strain (E=210GPa)?

A. 0.00089

B. 0.0005

C. 0.00064

D. 0.00098

Question 5

An unknown weight falls through a height of 10mm on a collar rigidly attached to a lower end of a vertical bar 500cm long. If E =200GPa what will be the value of stress?

A. 50 N/mm2

B. 60 N/mm2

C. 70 N/mm2

D. 80 N/mm2

Question 6

The maximum instantaneous extension, produced by an unknown falling weight in a vertical bar of length 3m. what will be the instantaneous stress induced in the vertical bar and the value of unknown weight if E = 200GPa?

A. 100 N/mm2

B. 110 N/mm2

C. 120 N/mm2

D. 140 N/mm2

Question 7

The maximum instantaneous extension, produced by an unknown falling weight through a height of 4cm in a vertical bar of length 3m and of cross section area 5cm2. what will be the instantaneous stress induced in the vertical bar and the value of unknown weight if E = 200GPa?

A. 1700 N

B. 1459.4 N

C. 1745.8 N

D. 1947.5 N

Question 8

What is the strain energy stored in a body when the load is applied with impact?

A. ÏE/V

B. ÏE2/V

C. ÏV2/E

D. ÏV2/2E

Question 9

What is the value of stress induced in the rod due to impact load?

A. P/A (1 + (1 + 2AEh/PL)1/2)

B. P/A (2 + 2AEh/PL)

C. P/A (1 + (1 + AEh/PL)1/2)

D. P/A ((1 + 2AEh/PL)1/2)

Question 10

What will be the stress induced in the rod if the height through which load is dropped is zero?

A. P/A

B. 2P/A

C. P/E

D. 2P/E

Question 11

What is the strain energy stored in a body when the load is applied with impact?

A. σE/V

B. σE2/V

C. σV2/E

D. σV2/2E