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MCQs

Total Questions : 2607 | Page 62 of 261 pages
Question 611. Cast iron pipes are mainly used
  1.    For conveying steam
  2.    In water and sewage systems
  3.    In pressure lubrication systems on prime movers
  4.    All of the above
 Discuss Question
Answer: Option B. -> In water and sewage systems
Question 612. A machine part subjected to _________ is called a strut.
  1.    An axial compressive force
  2.    A tangential force
  3.    An axial tensile force
  4.    Any one of these
 Discuss Question
Answer: Option A. -> An axial compressive force
Question 613. Which of the following pipe joints would be suitable for pipes carrying steam?
  1.    Flanged
  2.    Threaded
  3.    Bell and spigot
  4.    Expansion
 Discuss Question
Answer: Option D. -> Expansion
Question 614. The expression 0.175 - 0.841/T is the Lewis form factor for
  1.    14½° composite and full depth involute system
  2.    20° full depth involute system
  3.    20° stub system
  4.    None of the above
 Discuss Question
Answer: Option C. -> 20° stub system
Question 615. In worm gears, the pressure angle is __________ the angle between two inclined faces in axial plane.
  1.    Half
  2.    Twice
  3.    Thrice
  4.    None of these
 Discuss Question
Answer: Option A. -> Half
Question 616. The ultimate strength of steel in tension in comparison to shear is in the ratio of
  1.    1: 1
  2.    2:1
  3.    3: 2
  4.    2: 3
 Discuss Question
Answer: Option C. -> 3: 2
Question 617.

 

For a bevel gear having the pitch angle `theta` , the ratio of formative number of teeth (TE) to actual number of teeth (T) is



  1.    `1//sin theta`
  2.    `1//cos theta`
  3.    `1//tan theta`
  4.    `sin theta cos theta`
 Discuss Question
Answer: Option B. -> `1//cos theta`


Question 618.

When a shaft is subjected to combined twisting moment (T) and bending moment (M), then the equivalent bending moment is equal toWhen A Shaft Is Subjected To Combined Twisting Moment (T) An...


  1.    `1/2 sqrt(M^2 + T^2)`
  2.    ` sqrt(M^2 + T^2)`
  3.    `1/2 (M + sqrt(M^2 + T^2)`
  4.    `M + sqrt(M^2 + T^2)`
 Discuss Question
Answer: Option C. -> `1/2 (M + sqrt(M^2 + T^2)`


Question 619.
If P1 is the initial tension due to tightening up the bolt and P2 is the external load on the bolt, then the resultant load (P) on a bolt may be obtained by using the relation (where a = Ratio of elasticity of connected parts to the elasticity of bolt)
  1.    `P = P_1 + P_2`
  2.    `P = P_1 - P_2`
  3.    `P = P_1 + ((1 + a)/(a) ) P_2`
  4.    `P = P_1 + ((a)/(1 + a)) P_2`
 Discuss Question
Answer: Option D. -> `P = P_1 + ((a)/(1 + a)) P_2`


Question 620.
The notch sensitivity q is expressed in terms of fatigue stress concentration factor Kf and theoretical stress concentration factor Kt, as
  1.    `(k_f + 1)/(k_t + 1)`
  2.    `(k_f - 1)/(k_t - 1)`
  3.    `(k_t + 1)/(k_f+ 1)`
  4.    `(k_t -1)/(k_f - 1)`
 Discuss Question
Answer: Option B. -> `(k_f - 1)/(k_t - 1)`


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