Machine Design - Practice Test

[#141] The efficiency of a riveted joint is equal to

(A) $$frac{{{{ ext{P}}_{ ext{t}}}}}{{ ext{P}}}$$

(B) $$frac{{{{ ext{P}}_{ ext{s}}}}}{{ ext{P}}}$$

(C) $$frac{{{{ ext{P}}_{ ext{c}}}}}{{ ext{P}}}$$

(D) Least of $${{ ext{P}}_{ ext{t}}},,{{ ext{P}}_{ ext{s}}}$$ xa0and $$frac{{{{ ext{P}}_{ ext{c}}}}}{{ ext{P}}}$$

Correct Answer

(D) Least of $${{ ext{P}}_{ ext{t}}},,{{ ext{P}}_{ ext{s}}}$$ xa0and $$frac{{{{ ext{P}}_{ ext{c}}}}}{{ ext{P}}}$$

[#142] The strength of a riveted joint is equal to

(A) Tearing strength of plate (P t )

(B) Shearing strength of rivet (P s )

(C) Crushing strength of rivet (P c )

(D) Least value of P t , P s and P c

Correct Answer

(D) Least value of P t , P s and P c

[#143] In an oil lubricated journal bearing, the coefficient of friction between the journal and the bearing

(A) Remains constant at all speeds

(B) Is minimum at zero speed and increases monotonically with increase in speed

(C) Is maximum at zero speed and decreases monotonically with increase in speed

(D) Becomes minimum at an optimum speed and then increases with further increase in speed

Correct Answer

(D) Becomes minimum at an optimum speed and then increases with further increase in speed

[#144] When the connected members are very yielding (soft gasket) as compared to the bolt, then the resultant load on the bolt will be equal to the

(A) Initial tension

(B) External load applied

(C) Sum of the initial tension and external load applied

(D) Initial tension or external load, whichever is greater

(E) Initial tension

(F) External load applied

(G) Sum of the initial tension and external load applied

(H) Initial tension or external load, whichever is greater

Correct Answer

(C) Sum of the initial tension and external load applied
(G) Sum of the initial tension and external load applied

[#145] When the bolt is very yielding as compared to the connected members, then the resultant load on the bolt will be equal to the

(A) Initial tension

(B) External load applied

(C) Sum of the initial tension and external load applied

(D) Initial tension or external load, whichever is greater

Correct Answer

(D) Initial tension or external load, whichever is greater

Machine Design - Study Mode

[#141] The efficiency of a riveted joint is equal to

Correct Answer

[#142] The strength of a riveted joint is equal to

Correct Answer

[#143] In an oil lubricated journal bearing, the coefficient of friction between the journal and the bearing

Correct Answer

[#144] When the connected members are very yielding (soft gasket) as compared to the bolt, then the resultant load on the bolt will be equal to the

Correct Answer

[#145] When the bolt is very yielding as compared to the connected members, then the resultant load on the bolt will be equal to the

Correct Answer