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MCQs

Total Questions : 3147 | Page 139 of 315 pages
Question 1381. When a body is placed over a liquid, it will sink down if
  1.    gravitational force is equal to the upthrust of the liquid
  2.    gravitational force is less than the upthrust of the liquid
  3.    gravitational force is more than the upthrust of the liquid
  4.    none of the above
 Discuss Question
Answer: Option C. -> gravitational force is more than the upthrust of the liquid
Answer: (c).gravitational force is more than the upthrust of the liquid
Question 1382. The product of mass and accelaration of flowing liquid is called
  1.    inertia force
  2.    viscous force
  3.    gravity force
  4.    pressure force
 Discuss Question
Answer: Option A. -> inertia force
Answer: (a).inertia force
Question 1383. When a cylindrical vessel of radius (r) containing liquid is revolved about its vertical axis ω rad/s, then depth of parabola which the liquid assumes is
  1.    ω.r/2g
  2.    ω².r²/2g
  3.    ω.r/4g
  4.    ω².r²/4g
 Discuss Question
Answer: Option B. -> ω².r²/2g
Answer: (b).ω².r²/2g
Question 1384. The discharge through a wholly drowned orifice is given by (where H1 = Height of water (on the upstream side) above the top of the orifice, H2 = Height of water (on the downstream side) above the bottom of the orifice, and H = Difference between two water levels on either side of the orifice)
  1.    Q = Cd × bH₁ × √(2gh)
  2.    Q = Cd × bH2 × √(2gh)
  3.    Q = Cd × b (H2 - H1) × √(2gh)
  4.    Q = Cd × bH × √(2gh)
 Discuss Question
Answer: Option C. -> Q = Cd × b (H2 - H1) × √(2gh)
Answer: (c).Q = Cd × b (H2 - H1) × √(2gh)
Question 1385. A manometer is used to measure
  1.    atmospneric pressure
  2.    pressure in pipes and channels
  3.    pressure in venturimeter
  4.    difference of pressures between two points in a pipe
 Discuss Question
Answer: Option B. -> pressure in pipes and channels
Answer: (b).pressure in pipes and channels
Question 1386. If the value of coefficient of discharge increases, the discharge through the orifice decreases.
  1.    True
  2.    False
  3.    Can't say
  4.    None of these
 Discuss Question
Answer: Option B. -> False
Answer: (b).False
Question 1387. A point, in a compressible flow where the velocity of fluid is zero, is called
  1.    critical point
  2.    vena contracta
  3.    stagnation point
  4.    none of these
 Discuss Question
Answer: Option C. -> stagnation point
Answer: (c).stagnation point
Question 1388. The point at which the resultant pressure on an immersed surface acts, is known as
  1.    centre of gravity
  2.    centre of depth
  3.    centre of pressure
  4.    centre of immersed surface
 Discuss Question
Answer: Option C. -> centre of pressure
Answer: (c).centre of pressure
Question 1389. The metacentric height of a ship is 0.6 m and the radius of gyration is 4 m. The time of rolling of a ship is
  1.    4.1 s
  2.    5.2 s
  3.    10.4 s
  4.    14.1 s
 Discuss Question
Answer: Option C. -> 10.4 s
Answer: (c).10.4 s
Question 1390. A differential manometer is used to measure
  1.    atmospheric pressure
  2.    pressure in pipes and channels
  3.    pressure in venturimeter
  4.    difference of pressures between two points in a pipe
 Discuss Question
Answer: Option D. -> difference of pressures between two points in a pipe
Answer: (d).difference of pressures between two points in a pipe

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