Fluid Mechanics (Chemical Perspective) – Multiple Choice Questions (MCQs)

1. 85. What is 'flow measurement'?

   • A. The quantification of fluid movement through a system
   • B. The measurement of fluid properties
   • C. The measurement of pipe dimensions
   • D. The measurement of temperature

2. 86. What is 'control volume' in fluid mechanics?

   • A. An imaginary region in space through which fluid flows
   • B. A fixed volume of fluid
   • C. A solid object
   • D. A closed system

3. 87. What is 'control surface' in fluid mechanics?

   • A. The boundary of a control volume
   • B. The surface of a solid object
   • C. The surface of a fluid
   • D. A hypothetical surface

4. 88. What is 'conservation of momentum' applied to a fluid?

   • A. Newton's second law for fluid systems
   • B. Conservation of energy
   • C. Conservation of mass
   • D. Conservation of volume

5. 89. What is 'pipe sizing'?

   • A. The process of determining the appropriate diameter of pipes for a given fluid flow rate and pressure drop
   • B. The process of selecting pipe material
   • C. The process of installing pipes
   • D. The process of cleaning pipes

6. 90. What is the 'equivalent length method' for minor losses?

   • A. A method to express minor losses as an equivalent length of straight pipe that would cause the same friction loss
   • B. A method to calculate major losses
   • C. A method to calculate pump power
   • D. A method to determine pipe diameter

7. 91. What is 'power required for pumping'?

   • A. The energy input needed to drive a pump and overcome fluid friction and elevation changes
   • B. The heat generated by the pump
   • C. The work done by the fluid
   • D. The pressure developed by the pump

8. 92. What is 'pump efficiency'?

   • A. The ratio of the hydraulic power delivered to the fluid to the power input to the pump shaft
   • B. The ratio of discharge pressure to suction pressure
   • C. The ratio of flow rate to head
   • D. The ratio of impeller speed to fluid speed

9. 93. What is 'hydraulic grade line' (HGL)?

   • A. A line representing the sum of the pressure head and elevation head in a fluid system
   • B. A line representing the total head
   • C. A line representing the velocity head only
   • D. A line representing friction losses

10. 94. What is the relationship between EGL and HGL?

    • A. EGL is always above HGL by the velocity head (V²/2g)
    • B. EGL is always below HGL
    • C. EGL and HGL are always the same
    • D. EGL and HGL are unrelated

11. 95. What is 'ventilation' in fluid mechanics?

    • A. The process of providing fresh air to an enclosed space or removing stale air
    • B. The process of heating air
    • C. The process of cooling air
    • D. The process of compressing air

12. 96. What is 'aeration' in fluid mechanics?

    • A. The process of mixing air with a liquid
    • B. The process of removing air from a liquid
    • C. The process of heating a liquid
    • D. The process of cooling a liquid