Lakshya Education MCQs

Question: The c.g. of a thin hollow cone of height ‘h’, above its base lies on the axis, at a height of
Options:
A. h/3
B. h/4
C. 2h/3
D. 3h/4
Answer: Option C

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Question 1. The displacement of a particle which moves along a straight line is given by s = 4t³ + 3t²- 10 where ‘s’ is in meters and t is in seconds. the time taken by the particle to acquire a velocity of 18 m/sec from rest, is
  1.     ½ sec
  2.     1 sec
  3.     1.2 sec
  4.     1.5 sec
Answer: Option B
Question 2. The bending moment in an arch is proportional to
  1.     Vertical ordinate of funicular polygon
  2.     Vertical ordinate of the arch
  3.     Intercept between the arch axis and the funicular polygon
  4.     None of these
Answer: Option C
Question 3. The maximum pull in a cable, carrying a uniformly distributed load and supported at two ends which are at the same level, is at
  1.     Supports
  2.     Quarter span
  3.     Mid span
  4.     None of the above
Answer: Option A
Question 4. The c.g. of a right circular cone lies on its axis of symmetry at a height of
  1.     h/2
  2.     h/3
  3.     h/4
  4.     h/5
Answer: Option C
Question 5. The apparent weight of a man in a moving lift is less than his real weight when it is going down with
  1.     Uniform speed
  2.     An acceleration
  3.     Linear momentum
  4.     Retardation
Answer: Option B
Question 6. The c.g. of the shaded area of the bellow figure from the x-axis is
  1.     a/4
  2.     3a/4
  3.     3b/10
  4.     3a/10
Answer: Option C

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