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. ÏE/V
B. ÏE2/V
C. ÏV2/E
D. ÏV2/2E

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