Machine Design Questions and Answers – Multi Leaf Spring

This set of Machine Design Multiple Choice Questions & Answers (MCQs) focuses on “Leaf Spring”.

1. Bending stress in graduated length leaves are more than that in full length leaves.
a) Yes
b) No
c) In some cases
d) Can’t be stated
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2. Nip is the initial gap between extra full length leaf and the graduated length leaf before the assembly.
a) True
b) False
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3. Nipping is defined as leaving the gap between full length leaf and graduated length leaf.
a) True
b) False
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4. A leaf spring consists of 3 extra full length leaves and 14 graduated length leaves. The maximum force that can act on the spring is 70kN and the distance between eyes of the spring is 1.2m. Width and thickness of the leaves are 100mm and 12mm respectively. If modulus of elasticity is 207000N/mm², calculate the initial nip.
a) 26.8mm
b) 24.9mm
c) 22.5mm
d) 23.1mm
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5. A leaf spring consists of 3 extra full length leaves and 14 graduated length leaves. The maximum force that can act on the spring is 70kN and the distance between eyes of the spring is 1.2m. Width and thickness of the leaves are 100mm and 12mm respectively. Calculate the initial pre load required to close the nip.
a) 4332.2N
b) 4674.1N
c) 4985.4N
d) Can’t be determined
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6. Belleville spring can be used in clutch application.
a) True
b) False
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7. Belleville spring can only produce linear load deflection characteristics.
a) Only linear
b) Linear as well as non linear
c) Non-linear
d) None of the mentioned
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8. When two Belleville sprigs are arranged in series, half deflection is obtained for same force.
a) One fourth deflection
b) Double deflection
c) Four time deflection
d) None of the listed
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9. When two Belleville springs are in parallel, half force is obtained for a given deflection.
a) Half force
b) Double force
c) Same force
d) Can’t be determined
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10. Propagation of fatigue failure is always due to compressive stresses.
a) Due to bending
b) Due to tensile
c) Due to fatigue
d) None of the listed
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11. The strain energy stored in a spiral spring is given by?
a) 12M²L/Ebtᵌ
b) 6M²L/Ebtᵌ
c) 8M²L/Ebtᵌ
d) None of the listed
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Sanfoundry Global Education & Learning Series – Machine Design.
To practice all areas of Machine Design, here is complete set of 1000+ Multiple Choice Questions and Answers.

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