Lakshya Education MCQs

Question: Inertia force acts
Options:
A. Perpendicular to the acceleration force
B. Along the direction of acceleration force
C. Opposite to the direction of acceleration force
D. None of the above
Answer: Option C

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More Questions on This Topic :

Question 1. The efficiency of a screw jack is maximum, when (where α = helix angle, and φ = angle of friction)
  1.     α = 45° + φ/2
  2.     α = 45° - φ/2
  3.     α = 90° + φ
  4.     α = 90° - φ
Answer: Option B
Question 2. The rotating shafts tend to vibrate violently at whirling speeds because
  1.     The system is unbalanced
  2.     Bearing centre line coincides with the axis
  3.     The shafts are rotating at very high speeds
  4.     Resonance is caused due to the heavy mass of the rotor
Answer: Option D
Question 3. The total number of instantaneous centers for a mechanism consisting of n links are
  1.     n/2
  2.     n
  3.     n - 1
  4.     n(n - 1)/2
Answer: Option D
Question 4. The total number of instantaneous centers for a mechanism consisting of n links are
  1.     n/2
  2.     n
  3.     n - 1
  4.     n(n - 1)/2
Answer: Option D
Question 5. In a screw jack, the effort required to lift the load w is given by (where α = helix angle, and φ = angle of friction)
  1.     P = W tan(α - φ)
  2.     P = W tan(α + φ)
  3.     P = W tan(φ - α)
  4.     P = W cos(α + φ)
Answer: Option B
Question 6. The efficiency of a screw jack is maximum, when (where α = helix angle, and φ = angle of friction)
  1.     α = 45° + φ/2
  2.     α = 45° - φ/2
  3.     α = 90° + φ
  4.     α = 90° - φ
Answer: Option B

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