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    Mechanical Engineering : Machine Design Question & Answer in English

6.
 Ball bearing is usually made from -
A.  Low carbon Steel
B.  High carbon steel
C.  Medium carbon steel
D.  High speed steel

7.
Hook’s law holds good up to -
A.  Yield point
B.  Elastic limit
C.  Plastic limit
D.  Breaking point

8.
The modulus of elasticity for mind steel is approximately equal to -
A.  80 KN/ MM2
B.  100 KN/ MM2
C.  110 KN/ MM2
D.  210 KN/ MM2

9.
  The ratio of the ultimate stress to the design stress is known as - 
A.  Elastic limit
B.  Strain
C.  Factor of safety
D.  Bulk modulus

10.
The factor of safety steel and for steady load is -
A.  2
B.  4
C.  6
D.  8

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