Practice Test: Question Set - 38
1. Which of the following factors does not contribute to the pressure drop in a pipeline?
- (A) Velocity of fluid
- (B) Size of pipe
- (C) Length of pipe and number of bends
- (D) None of these
2. Two dimensional stream function
- (A) Relates velocity and pressure
- (B) Is constant along a stream line
- (C) Is constant along an equipotential surface
- (D) None of these
3. What is the force required (in Newtons) to hold a spherical balloon stationary in water at a depth of H from the air-water interface? The balloon is of radius 0.1 m and is filled with air.
- (A) 4πg/3
- (B) 0.01 πgH/4
- (C) 0.01 πgH/8
- (D) 0.04 πgH/3
4. Small pressure differences in liquids is measured using a/an
- (A) U-tube manometer
- (B) Inclined tube manometer
- (C) Pitot tube
- (D) None of these
5. Cd for the orifice plate varies from
- (A) 0.58 to 0.8
- (B) 0.93 to 0.98
- (C) 0.2 to 0.3
- (D) 0.02 to 0.03
6. Choose the correct set of dimensions of viscosity that are equivalent (where, F, M, L, T are dimensions for force, mass, length and time respectively).
- (A) FL-2T, ML-1T-1
- (B) FLT, ML-1T-1
- (C) ML-1T-3, F-1L2T
- (D) F-1L2T-1, MLT-3
7. Reynolds number is the ratio of
- (A) Viscous forces to gravity forces
- (B) Inertial forces to viscous forces
- (C) Viscous forces to inertial forces
- (D) Inertial forces to gravity forces
8. Which of the following two quantities when same, makes one pipe system equivalent to another pipe system?
- (A) Head & discharge
- (B) Length & discharge
- (C) Length & diameter
- (D) Friction factor & diameter
9. Friction produced by the formation of wakes is called the __________ friction.
- (A) Disk
- (B) Skin
- (C) Form
- (D) None of these
10. Slugging in a fluidized bed can be avoided by using
- (A) Tall narrow vessel
- (B) Deep bed of solids
- (C) Shallow beds of solids and proper choice of particle size
- (D) Very large particles
11. The discharge through a Venturimeter depends upon
- (A) Pressure drop only
- (B) Its orientation
- (C) Co-efficient of contraction only
- (D) None of these
12. Fluid flow in a/an __________ is an example of pressure flow.
- (A) Partially filled pipeline
- (B) Pipe
- (C) Open channel
- (D) River
13. The head loss due to sudden expansion is
- (A) (V12 - V22)/2gc
- (B) (V1 - V2)2/2gc
- (C) (V1 - V2)/2gc
- (D) (V12 - V22)/gc
14. Boundary layer separation is characterized by one of the conditions given below, where 'Re' is the Reynolds number for the flow. Select the appropriate conditions.
- (A) Re << 1, accelerating flow
- (B) Re >> 1, accelerating flow
- (C) Re << 1, decelerating flow
- (D) Re >>1, decelerating flow
15. The ratio of the wall drag to the form drag in the Stoke's law range (for motion of spherical particles in a stationary fluid) is
- (A) 0.5
- (B) 1
- (C) 2
- (D) 0.33
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