Engineering Fluid Mechanics Practice Problems with Solutions PDF Test - Set 13 - ObjectiveBooks

# Practice Test: Question Set - 13

1. Glass pipes can be joined by
(A) Flanges
(B) Welding
(C) Soldering
(D) Bell and spigot joint

2. Froude number is not a factor
(A) For Reynolds number greater than 300
(B) When there is no vortex formation
(C) For unbaffled tank
(D) None of these

3. For the same terminal conditions and fitting size, the least friction loss is incurred in a/an
(A) T-joint
(B) Union
(C) 45° elbow
(D) 90°bend

4. Check valve is used for __________ flow.
(A) Very precise control of
(B) Unidirectional
(C) Multidirectional
(D) None of these

5. At what value of crank angle (roughly), no flow of water from or into the air vessel takes place in case of a double acting reciprocating pump?
(A) 40° and 140°
(B) 45° and 60°
(C) 90° and 80°
(D) 20° and 120°

6. In turbulent flow, the
(A) Fluid particles move in an orderly manner
(B) Momentum transfer is on molecular scale only
(C) Shear stress is caused more effectively by cohesion than momentum transfer
(D) Shear stresses are generally larger than in a similar laminar flow

7. The ratio of maximum to average velocity in case of streamline flow between parallel plates is
(A) 1
(B) 1.5
(C) 2
(D) 2.5

8. Bernoulli's equation for steady, frictionless, continuous flow states that the __________ at all sections is same.
(A) Total pressure
(B) Total energy
(D) None of these

9. The valve commonly used in pipes larger than 2" dia is a
(A) Globe valve
(B) Plug-cock
(C) Gate valve
(D) Check valve

10. A streamline is a line in flow field,
(A) That is traced by all the fluid particles passing through a given point
(B) Along which a fluid particle travels
(C) Such that at every point on it, the velocity is tangential to it
(D) None of these

11. The energy loss in flow through Venturimeter is less than that through flow nozzle, because in case of a flow nozzle, the
(A) Length is shorter
(B) Throat diameter is more
(C) Sudden expansion of flow in the downstream occurs
(D) Distance between the throat and the inlet is more

12. The co-efficient of discharge of an orificemeter is a function of
(A) Reynolds number at the orifice
(B) Ratio of orifice dia to pipe dia
(C) Both (a) and (b)
(D) None of the above parameters, and has a constant value of 0.61

13. Which of the following equations applies to the fluid flow through a packed bed for very large Reynolds number?
(A) Fanning equation
(B) Blake-Plummer equation
(C) Hagen-Poiseuille equation
(D) Kozeny-Carman equation

14. A 2" gate valve fitted in a pipe is replaced by a similar globe valve. Pressure drop in gate valve was Î”p. For the same discharge, the pressure drop across globe valve is
(A) Î”p
(B) < Î”p
(C) > Î”p
(D) Î”p2

15. Which of the following flow measuring devices is an area meter?
(A) Venturimeter
(B) Orificemeter
(C) Anemometer
(D) Rotameter

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