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MCQs

Total Questions : 110 | Page 11 of 11 pages
Question 101. For scalar fields φ and Ψ, the value of ∇.(∇φ * ∇Ψ) is ______
  1.    0
  2.    1
  3.    2
  4.    3
 Discuss Question
Answer: Option A. -> 0


-NA-


Question 102. If σ and ε are true stress and true strain, respectively, the maximum true uniform strain that can be imparted to a material obeying σ = 1050ε0.25 is _________
  1.    0.25
  2.    0.5
  3.    0.75
  4.    1.0
 Discuss Question
Answer: Option A. -> 0.25


-NA-


Question 103. The atomic packing fraction of diamond cubic structure is __________
  1.    2.123 to 2.125
  2.    0.001 to 0.005
  3.    0.339 to 0.341
  4.    1.546 to 1.549
 Discuss Question
Answer: Option C. -> 0.339 to 0.341


-NA-


Question 104. The total number of possible heat transfer mode(s) is __________
  1.    7
  2.    3
  3.    13
  4.    17
 Discuss Question
Answer: Option B. -> 3


-NA-


Question 105. Arc welding is done using current, voltage and welding speed of 200 A, 20 V and 0.01 m/s,
respectively. The heat input in kJ per unit length is _________
  1.    100
  2.    600
  3.    800
  4.    400
 Discuss Question
Answer: Option D. -> 400


-NA-


Question 106. Which one of the following series is divergent?
  1.    .
  2.    .
  3.    .
  4.    .
 Discuss Question
Answer: Option B. -> .


-NA-


Question 107. A unit cell of an element has maximum linear density along the [110] direction. The packing
density of its (100) plane is
  1.    0.68
  2.    0.74
  3.    0.79
  4.    0.91
 Discuss Question
Answer: Option C. -> 0.79


-NA-


Question 108. Taylor series expansion of the function f(x) = x/(1 + x) around x = 0 will be
  1.    1 + x + x2 + x3 + ...
  2.    1 - x + x2 - x3 + ...
  3.    0 + x + x2/2 + x3/3 + ...
  4.    0 + x - x2 + x3 - ...
 Discuss Question
Answer: Option D. -> 0 + x - x2 + x3 - ...


-NA-


Question 109. There are 150 gearwheels in a box, out of which 112 are within the required tolerance, 21 are below
and rest are above the required tolerance. If the selection is done without replacement, the
combined probability of randomly selecting a gearwheel below the tolerance and then a second one
above the tolerance is
  1.    0.016
  2.    0.032
  3.    0.492
  4.    0.984
 Discuss Question
Answer: Option A. -> 0.016


-NA-


Question 110. For an FCC metal, the ratio of interplanar spacing obtained from the first two peaks of the X-ray
diffraction pattern is
  1.    1.91
  2.    1.63
  3.    1.41
  4.    1.15
 Discuss Question
Answer: Option D. -> 1.15


-NA-


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