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SSC-JE ME || Machine Design Full Revision Quiz

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Question 1

The friction torque, transmitted in case of flat pivot bearing for uniform ratio of wear is equal to

Question 2

If the load on a ball bearing is reduced to half, then its life would be ________.

Question 3

Tearing efficiency of riveted Joint is 70% , The pitch to hole diameter ratio of rivets is

Question 4

Multi plate friction clutch is suitable for

Question 5

The included angle for V belt is usually

Question 6

The power transmitted by a belt drive is (T₁=Tension on tight side, T₂=Tension on slack side, where v = linear velocity, ω = angular velocity)

Question 7

A machine component is subjected to variable loading -60 MPa and +60 MPa. If the endurance strength and yield strength for the material are 200 MPa and 300 MPa, respectively, the factor of safety ( based on Soderberg equation) is______.

Question 8

A body is subjected to completely reversed stress. The maximum stress is 30 Pa. What is the stress ratio?

Question 9

According to maximum shear stress, the ratio of maximum shear stress to yield stress is equal to

Question 10

Required velocity ratio is 60:1, which of the following are recommended _________?

Question 11

The Wahl stress factor K for springs of spring index

is given by

Question 12

A compression spring is made of music wire of 2 mm diameter having a shear strength and shear modulus of 800 MPa and 80 GPa respectively. The mean coil diameter is 20 mm, free length is 40 mm and the number of active coils is 10. If the mean coil diameter is reduced to 10 mm, the stiffness of the spring is approximately

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AE & JE Exams Mechanical Engineering

Sep 29AE & JE Exams