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MCQs

Total Questions : 3147 | Page 35 of 315 pages
Question 341. In a centrifugal pump, the liquid enters the pump
  1.    At the top
  2.    At the bottom
  3.    At the canter
  4.    From sides
 Discuss Question
Answer: Option C. -> At the canter
Question 342. Bulk modulus of a fluid is the ratio of
  1.    Shear stress to shear strain
  2.    Increase in volume to the viscosity of fluid
  3.    Increase in pressure to the volumetric strain
  4.    Critical velocity to the viscosity of fluid
 Discuss Question
Answer: Option C. -> Increase in pressure to the volumetric strain
Question 343. The ratio of the inertia force to the __________ is called Euler's number.
  1.    Pressure force
  2.    Elastic force
  3.    Surface tension force
  4.    Viscous force
 Discuss Question
Answer: Option A. -> Pressure force
Question 344. The type of centrifugal pump preferred for a specific speed of 20 r.p.m. is
  1.    Slow speed pump with radial flow at outlet
  2.    Medium speed pump with radial flow at outlet
  3.    High speed pump with radial flow at outlet
  4.    High speed pump with axial flow at outlet
 Discuss Question
Answer: Option A. -> Slow speed pump with radial flow at outlet
Question 345. A Pelton wheel develops 1750 kW under a head of 100 meters while running at 200 r.p.m. and discharging 2500 liters of water per second. The unit speed of the wheel is
  1.    10 r.p.m.
  2.    20 r.p.m.
  3.    40 r.p.m.
  4.    80 r.p.m.
 Discuss Question
Answer: Option B. -> 20 r.p.m.
Question 346. A flow in which __________ force is dominating over the viscosity is called turbulent flow.
  1.    Elastic
  2.    Surface tension
  3.    Viscous
  4.    Inertia
 Discuss Question
Answer: Option D. -> Inertia
Question 347. An orifice is said to be large, if
  1.    The size of orifice is large
  2.    The velocity of flow is large
  3.    The available head of liquid is more than 5 times the height of orifice
  4.    The available head of liquid is less than 5 times the height of orifice
 Discuss Question
Answer: Option D. -> The available head of liquid is less than 5 times the height of orifice
Question 348. Which of the following meters is not associated with viscosity?
  1.    Red wood
  2.    Say bolt
  3.    Engler
  4.    Orsat
 Discuss Question
Answer: Option D. -> Orsat
Question 349. The maximum hydraulic efficiency of an impulse turbine is (where φ = Angle of blade tip at outlet)
  1.    (1 + cos φ)/2
  2.    (1 - cos φ)/2
  3.    (1 + sin φ)/2
  4.    (1 - sin φ)/2
 Discuss Question
Answer: Option A. -> (1 + cos φ)/2
Question 350. According to Darcy's formula, the loss of head due to friction in the pipe is (where f = Darcy's coefficient, l = Length of pipe, v = Velocity of liquid in pipe, and d = Diameter of pipe)
  1.    flv²/2gd
  2.    flv²/gd
  3.    3flv²/2gd
  4.    4flv²/2gd
 Discuss Question
Answer: Option D. -> 4flv²/2gd

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