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MCQs

Total Questions : 2607 | Page 83 of 261 pages
Question 821. The included angle for the V-belt is usually
  1.    10°-20°
  2.    30°-40°
  3.    40°-60°
  4.    60°-80°
 Discuss Question
Answer: Option B. -> 30°-40°
Answer: (b).30°-40°
Question 822. In static loading, stress concentration is more serious in
  1.    brittle materials
  2.    ductile materials
  3.    brittle as well as ductile materials
  4.    elastic materials
 Discuss Question
Answer: Option A. -> brittle materials
Answer: (a).brittle materials
Question 823. In a boundary lubricated bearing, there is a __________ of lubricant between the journal and the bearing.
  1.    thick film
  2.    thin film
  3.    Can't say
  4.    None of these
 Discuss Question
Answer: Option B. -> thin film
Answer: (b).thin film
Question 824. If the helix angle of a helical gear is increased, the load carrying capacity of the tooth increases.
  1.    Correct
  2.    Incorrect
  3.    Can't say
  4.    None of these
 Discuss Question
Answer: Option B. -> Incorrect
Answer: (b).Incorrect
Question 825. When the top of a tooth undercuts the root on the mating gear, it is known as interference.
  1.    Yes
  2.    No
  3.    Can't say
  4.    None of these
 Discuss Question
Answer: Option A. -> Yes
Answer: (a).Yes
Question 826. The design of the pressure vessel is based on
  1.    longitudinal stress
  2.    hoop stress
  3.    longitudinal and hoop stress
  4.    none of these
 Discuss Question
Answer: Option B. -> hoop stress
Answer: (b).hoop stress
Question 827. A spring is used to
  1.    measure forces
  2.    apply forces
  3.    store energy
  4.    all of these
 Discuss Question
Answer: Option D. -> all of these
Answer: (d).all of these
Question 828.

The stiffness of a closely coiled helical spring subjected to an axial load W is equal to (where G = Modulus of rigidity, and n = Number of active coils)


  1.    `(Gd^4)/(8D^3 n)`
  2.    `(Gd^3)/(8D^3 n)`
  3.    `(Gd^4)/(4D^3 n)`
  4.    `(Gd^4)/(8D^2 n)`
 Discuss Question
Answer: Option A. -> `(Gd^4)/(8D^3 n)`


Question 829.

If T1 and T2 are the tensions on the tight and slack sides of the belt respectively, and Tc is the centrifugal tension, then initial tension in the belt is equal to


  1.    `T_1 - T_2 + T_c`
  2.    `T_1 + T_2 +T_c`
  3.    `(T_1 - T_2 + T_c)/(2)`
  4.    `(T_1 + T_2 +T_c)/(2)`
 Discuss Question
Answer: Option D. -> `(T_1 + T_2 +T_c)/(2)`


Question 830.
A double fillet welded joint with parallel fillet weld of length l and leg s is subjected to a tensile force P. Assuming uniform stress distribution, the shear stress in the weld is given by
  1.    `(sqrt(2)P)/(s.l)`
  2.    `(p)/(2.s.l)`
  3.    `(p)/(sqrt(2.s.l)`
  4.    `(2P)/(s.l)`
 Discuss Question
Answer: Option C. -> `(p)/(sqrt(2.s.l)`


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