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MCQs

Total Questions : 98 | Page 5 of 10 pages
Question 41. Which of the following stresses are associated with the tightening of a nut on a bolt?
P. Tensile stress due to the streching of bolt
Q. Bending stress due to the bending of bolt
R. Torsional shear stress due to frictional resistance between the nut and the bolt
Select the correct answer using the codes given below.
  1.    P and Q
  2.    P and R
  3.    Only P
  4.    R and Q
 Discuss Question
Answer: Option A. -> P and Q
Answer: (a).P and Q
Question 42. The phenomenon of slow growth of strain under a steady tensile stress is called ____________
  1.    Yielding
  2.    Creeping
  3.    Breaking
  4.    None of the mentioned
 Discuss Question
Answer: Option B. -> Creeping
Answer: (b).Creeping
Question 43. When equal and opposite forces applied to a body, tend to elongate it, the stress so produced, is called ____________
  1.    Shear stress
  2.    Compressive stress
  3.    Tensile stress
  4.    Transverse stress
 Discuss Question
Answer: Option C. -> Tensile stress
Answer: (c).Tensile stress
Question 44. A rod 150cm long and of diameter 2cm is subjected to an axial pull of 20kN. What will be the stress?
  1.    60 N/mm²
  2.    65 N/mm²
  3.    63.6 N/mm²
  4.    71.2 N/mm²
 Discuss Question
Answer: Option C. -> 63.6 N/mm²
Answer: (c).63.6 N/mm²
Question 45. What will be the minimum diameter of a steel wire, which is used to raise a load of 4000N if the stress in the rod is not to exceed 95 MN/m²?
  1.    6mm
  2.    6.4mm
  3.    7mm
  4.    7.3mm
 Discuss Question
Answer: Option D. -> 7.3mm
Answer: (d).7.3mm
Question 46. A tensile test was conducted on mild steel bar. The load at elastic limit was 250kN and the diameter of the steel bar was 3cm. What will be the value of stress?
  1.    35368 x 10⁴ N/m²
  2.    32463 x 10⁴ N/m²
  3.    35625 x 10⁴ N/m²
  4.    37562 x 10⁴ N/m²
 Discuss Question
Answer: Option A. -> 35368 x 10⁴ N/m²
Answer: (a).35368 x 10⁴ N/m²
Question 47. The stress in a rod is 70 N/mm² and the modulus of elasticity is 2 x 10⁵ N/mm². what will be the strain in the rod?
  1.    0.00052
  2.    0.00035
  3.    0.00030
  4.    0.00047
 Discuss Question
Answer: Option B. -> 0.00035
Answer: (b).0.00035
Question 48. For keeping the stress wholly compressive the load may be applied on a circular column anywhere within a concentric circle of diameter _____________
  1.    D/2
  2.    D/3
  3.    D/4
  4.    D/8
 Discuss Question
Answer: Option C. -> D/4
Answer: (c).D/4
Question 49. How does the elastic constant varys with the elongation of body?
  1.    The elastic constant is directly proportional to the elongation
  2.    The elastic constant is inversely proportional to the elongation
  3.    The elongation does not depends on the elastic constant
  4.    None of these
 Discuss Question
Answer: Option B. -> The elastic constant is inversely proportional to the elongation
Answer: (b).The elastic constant is inversely proportional to the elongation
Question 50. A mild steel wire 5mm in diameter and 1m ling. If the wire is subjected to an axial tensile load 10kN what will be its extension?
  1.    2.55mm
  2.    3.15mm
  3.    2.45mm
  4.    2.65mm
 Discuss Question
Answer: Option A. -> 2.55mm
Answer: (a).2.55mm

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