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MCQs

Total Questions : 543 | Page 24 of 55 pages
Question 231. In Meyer's expansion valve, the main valve is driven by an eccentric having an angle of advance from
  1.    10° - 15°
  2.    15° - 25°
  3.    25° - 30°
  4.    30° - 40°
 Discuss Question
Answer: Option C. -> 25° - 30°
Question 232. The angle of inclination of the plane, at which the body begins to move down the plane is called
  1.    Angle of friction
  2.    Angle of repose
  3.    Angle of projection
  4.    None of these
 Discuss Question
Answer: Option B. -> Angle of repose
Question 233. The radial distance of a tooth from the pitch circle to the bottom of the tooth is called
  1.    Dedendum
  2.    Addendum
  3.    Clearance
  4.    Working depth
 Discuss Question
Answer: Option A. -> Dedendum
Question 234. A spring controlled governor is said to be isochronous when the controlling force
  1.    Increases as the radius of rotation decreases
  2.    Increases as the radius of rotation increases
  3.    Decreases as the radius of rotation increases
  4.    Remain constant for all radii of rotation
 Discuss Question
Answer: Option D. -> Remain constant for all radii of rotation
Question 235. If the radius of gyration of a compound pendulum about an axis through e.g. is more, then its frequency of oscillation will be
  1.    Less
  2.    More
  3.    Same
  4.    Data are insufficient to determine same
 Discuss Question
Answer: Option A. -> Less
Question 236. A shaft has two heavy rotors mounted on it. The transverse natural frequencies, considering each of the rotor separately, are 100 Hz and 200 Hz respectively. The lowest critical speed is
  1.    5,367 r.p.m.
  2.    6,000 r.p.m.
  3.    9,360 r.p.m.
  4.    12,000 r.p.m.
 Discuss Question
Answer: Option A. -> 5,367 r.p.m.
Question 237. A spring controlled governor is said to be unstable when the controlling force
  1.    Increases as the radius of rotation decreases
  2.    Increases as the radius of rotation increases
  3.    Decreases as the radius of rotation increases
  4.    Remains constant for all radii of rotation
 Discuss Question
Answer: Option C. -> Decreases as the radius of rotation increases
Question 238. In gramophones for adjusting the speed of the turntable, the following type of governor is commonly employed
  1.    Hartung governor
  2.    Wilson Hartnell governor
  3.    Pickering governor
  4.    Inertia governor
 Discuss Question
Answer: Option C. -> Pickering governor
Question 239. Angular acceleration of a link can be determined by dividing the
  1.    Centripetal component of acceleration with length of link
  2.    Tangential component of acceleration with length of link
  3.    Resultant acceleration with length of link
  4.    All of the above
 Discuss Question
Answer: Option B. -> Tangential component of acceleration with length of link
Question 240. In a system subjected to damped forced vibrations, the ratio of maximum displacement to the static deflection is known as
  1.    Critical damping ratio
  2.    Damping factor
  3.    Logarithmic decrement
  4.    Magnification factor
 Discuss Question
Answer: Option D. -> Magnification factor

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