Machine Design - Interview Questions | Exam2Win

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71. A tap bolt

A. has a head on one end and a nut fitted to the other

B. has head at one end and other end fits into a tapped hole in the other part \o be joined

C. has both the ends threaded

D. has pointed threads

E. requires locking devices.

Explanation:

72. A bolt

A. has a head on one end and a nut fitted to the other

B. has head at one end and other end fits into a tapped hole in the other part to be joined

C. has both the ends threaded

D. is provided with pointed threads

E. requires no nut.

Explanation:

73. Resistance to fatigue of a material is measured by

A. Young's modulus

B. coefficient of elasticity

C. elastic limit

D. ultimate tensile strength

E. endurance limit.

Explanation:

74. The fatigue limit of a material

A. is greatly decreased by poor surface conditions

B. remains same irrespective of surface conditions

C. depends mainly on core composition

D. is dependent upon yield strength of material

E. none of the above.

Explanation:

75. If d is the diameter of bolt hole then for a flanged pipe joint to be leak proof, the circumferential pitch of the bolts should be

A. lOVZ

B. 10VZtol5Vd

C. 15Vdto20VZ

D. 20Vdto30Vd

E. 30V5"to40Vd.

Explanation: