Practice Test: Question Set - 16
1. The peripheral velocity at inlet of a centrifugal pump having inlet diameter of 25 cms and rotating at 950 rpm is __________ m/sec.
- (A) 1.8
- (B) 12.4
- (C) 186.2
- (D) 736.4
2. The main factor on which the behavior of a mass of fluidized solid depends mainly is the
- (A) Fluid characteristics
- (B) Particle size
- (C) Both (a) and (b)
- (D) Neither (a) nor (b)
3. Hot wire anemometer is used to measure the
- (A) Velocity of liquids
- (B) Temperature of liquids
- (C) Velocity of gases
- (D) Pressure of liquids
4. Curve III in the bellow diagram represents a/an
- (A) Dilatent fluid
- (B) Pseudo plastic fluid
- (C) Ideal plastic
- (D) None of these
5. The pressure intensity is the same in all directions at a point in a fluid
- (A) Only when the fluid is frictionless
- (B) Only when the fluid is at rest having zero velocity
- (C) When there is no motion of one fluid layer relative to an adjacent
layer
- (D) Regardless of the motion of one fluid layer relative to an adjacent
layer
6. The capacity of a centrifugal pump Can be increased by increasing the
- (A) Impeller diameter or speed
- (B) Number of pumps and joining them in series
- (C) Number of pumps and joining them in parallel
- (D) All (a), (b) and (c)
7. Hydraulic mean radius for flow through packed bed of spherical particle of size, 'Dp, with porosity 'ε' is
- (A) (Dp/6) (ε/1- ε)
- (B) (Dp/6) (1- ε/ε)
- (C) ⅔Dp (1- ε/ε)
- (D) ⅔Dp (ε/1- ε)
8. The unit of velocity head is
- (A) ft-lb/sec
- (B) ft-lb/ft3
- (C) ft-lbf/lb
- (D) ft-lbf/sec
9. Gradually varying fluid flow is an example of __________ flow.
- (A) Non-steady uniform
- (B) Non-steady non-uniform
- (C) Steady uniform
- (D) Steady non-uniform
10. The head loss in turbulent flow in pipe is proportional to(where, V = velocity of fluid through the pipe)
- (A) V2
- (B) 1/V2
- (C) 1/V
- (D) V
11. Disc compensators are provided in large diameter fuel gas carrying pipelines to
- (A) Keep the pipe in proper orientation
- (B) Make the pipe joint leak-proof
- (C) Account for contraction/expansion of pipe due to
temperature changes of the surroundings
- (D) Account for the pressure variation side the pipeline
12. Piezometric head is the sum of the __________ heads.
- (A) Elevation & kinetic energy
- (B) Elevation & pressure
- (C) Kinetic energy & pressure
- (D) None of these
13. For a given Reynolds number, in a hydraulically smooth pipe, further smoothening __________ the friction factor.
- (A) Brings about no further reduction of
- (B) Increases
- (C) Decreases
- (D) None of these
14. Prandtl number is a measure of the
- (A) Heat conduction to viscosity of a fluid
- (B) Cp/Cv of
a fluid
- (C) Elastic force to pressure force in the fluid flow
- (D) Inertial force to elastic force in the fluid flow
15. Horsepower requirement for given pump capacity depends upon the
- (A) Specific gravity of the liquid
- (B) Suction lift
- (C) Discharge head
- (D) All (a), (b) and (c)
Next Tests: