Explore topic-wise MCQs in Machine Design.

This section includes 22 Mcqs, each offering curated multiple-choice questions to sharpen your Machine Design knowledge and support exam preparation. Choose a topic below to get started.

1.

Find total number coils in a spring having square and ground ends. Deflection in the spring is 6mm when load of 1100N is applied. Modulus of rigidity is 81370N/mm². Wire diameter and pitch circle diameter are 10mm and 50mm respectively.

A. 7
B. 6
C. 5
D. 4
Answer» B. 6
Discussion
2.

Find the Wahl’s factor if spring index is 6.

A. 1.202
B. 1.2424
C. 1.2525
D. 1.5252
Answer» D. 1.5252
Discussion
3.

Patenting is defined as the cooling below the freezing point of water.

A. True
B. False
Answer» C.
Discussion
4.

For two springs connected in parallel, net force is equal to the sum of force in each spring.

A. True
B. False
Answer» B. False
Discussion
5.

For two springs connected in series, the net deflection is equal to the sum of deflection in two springs.

A. True
B. False
Answer» B. False
Discussion
6.

The axial deflection of spring for the small angle of θ is given by?

A. 328PDᵌN/Gd⁴
B. 8PDᵌN/Gd⁴
C. 16PDᵌN/Gd⁴
D. 8PD²N/Gdᵌ
Answer» C. 16PDᵌN/Gd⁴
Discussion
7.

Martin’s factor compensates for curvature effect in springs.

A. True
B. False
Answer» C.
Discussion
8.

FOR_TWO_SPRINGS_CONNECTED_IN_PARALLEL,_NET_FORCE_IS_EQUAL_TO_THE_SUM_OF_FORCE_IN_EACH_SPRING.?$

A. True
B. False
Answer» B. False
Discussion
9.

Find the Wahl’s factor if spring index is 6.$#

A. 1.2020
B. 1.2424
C. 1.2525
D. 1.5252
Answer» D. 1.5252
Discussion
10.

Patenting_is_defined_as_the_cooling_below_the_freezing_point_of_water.$

A. True
B. False
Answer» C.
Discussion
11.

A railway wagon moving with a speed of 1.5m/s is brought to rest by bumper consisting of two springs. Mass of wagon is 100kg. The springs are compressed by 125mm. Calculate the maximum force acting on each spring.

A. 1200N
B. 1500N
C. 1800N
D. 2000N
Answer» D. 2000N
Discussion
12.

Find total number coils in a spring having square and ground ends. Deflection in the spring is 6mm when load of 1100N is applied. Modulus of rigidity is 81370N/mm². Wire diameter and pitch circle diameter are 10mm and 50mm respectively.$

A. 7
B. 6
C. 5
D. 4
Answer» B. 6
Discussion
13.

Find the mean coil diameter of a helical compression sprig if a load of 1200N is applied on the spring. Spring index is 6, and wire diameter 7mm.

A. 7/6mm
B. 42mm
C. 1200√ó6/7 mm
D. None of the listed
Answer» C. 1200‚Äö√†√∂‚àö‚â•6/7 mm
Discussion
14.

Find the shear stress in the spring wire used to design a helical compression sprig if a load of 1200N is applied on the spring. Spring index is 6, and wire diameter 7mm.

A. 452.2N/mm²
B. 468.6N/mm²
C. 512.2N/mm²
D. None of the listed
Answer» C. 512.2N/mm¬¨¬®‚Äö√¢¬ß
Discussion
15.

For two springs connected in series, the net deflection is equal to the sum of deflection in two springs?

A. True
B. False
Answer» B. False
Discussion
16.

For two spring connected in series, the force acting on each spring is same and equal to half of the external force.

A. True
B. False
Answer» C.
Discussion
17.

A spring of stiffness constant k is cut in two equal parts. The stiffness constant of new spring will be k/2.

A. True
B. False
Answer» C.
Discussion
18.

The axial deflection of spring for the small angle of θ is given by?$

A. 328PDᵌN/Gd⁴
B. 8PDᵌN/Gd⁴
C. 16PDᵌN/Gd⁴
D. 8PD²N/Gdᵌ
Answer» C. 16PD¬¨‚à묨¬µ‚àö‚Ä¢N/Gd‚Äö√Ñ√∂‚àö√ñ¬¨‚Ä¢
Discussion
19.

The angle of twist for the equivalent bar to a spring is given by? (Symbols have their usual meaning)

A. 8PD²N/Gd⁴
B. 16PD²N/Gd⁴
C. 16PDN/Gdᵌ
D. 8PDN/Gdᵌ
Answer» C. 16PDN/Gd¬¨‚à묨¬µ‚àö‚Ä¢
Discussion
20.

Martin’s factor compensates for curvature effect in springs.$

A. True
B. False
Answer» C.
Discussion
21.

Spring having square ends has 1 inactive coil.

A. True
B. False
Answer» C.
Discussion
22.

If a spring has plain ends then number of inactive coils is?

A. 1
B. 2
C. 3
D. 0
Answer» E.
Discussion