Chemical Engineering Exam Questions Fluid Mechanics - Set 47 - ObjectiveBooks

Chemical Engineering Exam Questions Fluid Mechanics - Set 47

Practice Test: Question Set - 47

1. While starting a centrifugal pump, its delivery valve should be kept
    (A) Opened
    (B) Closed
    (C) Either opened or closed; it does not make any difference
    (D) Either opened or closed; depending on the fluid viscosity

2. The friction factor for turbulent flow in a hydraulically smooth pipe
    (A) Depends only on Reynolds number
    (B) Does not depend on Reynolds number
    (C) Depends on the roughness
    (D) None of these

3. Buoyant force
    (A) For non-symmetrical bodies is not vertical
    (B) Depends on the depth of the submergence of the floating body
    (C) Depends on the weight of the floating body
    (D) None of these

4. Nominal Pipe Size (NPS) of a pipe less than 12 inches in diameter indicates its
    (A) Inner diameter
    (B) Outer diameter
    (C) Thickness
    (D) Neither inner nor outer diameter

5. The ratio of inertial forces to gravity forces is called the __________ number.
    (A) Mach
    (B) Froude
    (C) Euler
    (D) Weber

6. Capillary tube method of viscosity measurement is based on the
    (A) Hagen-Poiseuille’s equation
    (B) Stoke's law
    (C) Navier-stokes equation
    (D) None of these

7. Boundary layer separation occurs when the
    (A) Pressure reaches a minimum
    (B) Cross-section of the channel is reduced
    (C) Valve is closed in a pipeline
    (D) Velocity of sound is reached

8. In the low Reynolds number region, the drag force on a sphere is proportional to
    (A) V
    (B) V2
    (C) V4
    (D) V0.5

9. Boiler feed water pump is usually a __________ pump.
    (A) Reciprocating
    (B) Gear
    (C) Multistage centrifugal
    (D) Diaphragm

10. A fluid which has a linear relationship between the magnitude of applied shear-stress and the resulting rate of deformation is called a/an __________ fluid.
    (A) Newtonian
    (B) Non-Newtonian
    (C) Ideal
    (D) Incompressible

11. The rate of change of moment of momentum represents the __________ by the fluid.
    (A) Torque applied
    (B) Force exerted
    (C) Work done
    (D) Power developed

12. Venturimeter and orificemeter measures the __________ of the fluid.
    (A) Pressure
    (B) Maximum velocity
    (C) Average velocity
    (D) Point velocity

13. Interstage coolers are provided in a multistage compressor to
    (A) Save power in compressing a given volume to a given pressure
    (B) Cool the delivered air
    (C) Achieve the exact delivery pressure
    (D) None of these

14. Which of the following valves will incur maximum pressure drop for the same discharge of water?
    (A) Globe valve
    (B) Gate valve
    (C) Needle valve
    (D) Butterfly valve

15. When a fluid flows over a solid surface, the
    (A) Velocity is uniform at any cross-section
    (B) Velocity gradient is zero at the solid surface
    (C) Resistance between the surface & the fluid is lesser as compared to that between the fluid layers themselves
    (D) Velocity is not zero at the solid surface

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