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

1. 49. What is 'head' in fluid mechanics?

   • A. A measure of the energy content of a fluid per unit weight
   • B. The pressure of the fluid
   • C. The velocity of the fluid
   • D. The elevation of the fluid

2. 50. What is 'major head loss'?

   • A. Head loss due to friction in straight pipes
   • B. Head loss due to fittings
   • C. Head loss due to elevation
   • D. Head loss due to pumps

3. 51. What is 'minor head loss'?

   • A. Head loss due to friction in straight pipes
   • B. Head loss due to pipe entrances
   • C. exits
   • D. valves

4. 52. What is 'valve'?

   • A. A device used to control the flow of a fluid by opening
   • B. closing
   • C. or partially obstructing a passage
   • D. A device for measuring flow

5. 53. What is a 'gate valve'?

   • A. A valve that uses a wedge-shaped gate to stop or start flow
   • B. A valve for regulating flow
   • C. A valve for precise control
   • D. A valve that uses a diaphragm

6. 54. What is a 'globe valve'?

   • A. A valve that uses a spherical disc to regulate flow
   • B. A valve for on/off service
   • C. A valve that uses a gate
   • D. A valve with low pressure drop

7. 55. What is a 'ball valve'?

   • A. A valve that uses a rotating ball with a bore to control flow
   • B. A valve with a gate
   • C. A valve with a diaphragm
   • D. A valve for precise throttling

8. 56. What is a 'check valve'?

   • A. A valve that allows fluid to flow in only one direction
   • B. A valve that controls flow rate
   • C. A valve for on/off service
   • D. A valve for pressure relief

9. 57. What is a 'pressure relief valve'?

   • A. A valve designed to open automatically when the pressure exceeds a preset limit
   • B. A valve that controls flow rate
   • C. A valve for on/off service
   • D. A valve that allows flow in one direction

10. 58. What is 'net positive suction head required' (NPSHR)?

    • A. The minimum NPSH specified by the pump manufacturer to avoid cavitation at a given flow rate
    • B. The actual NPSH in the system
    • C. The maximum NPSH
    • D. The head developed by the pump

11. 59. For satisfactory pump operation, what is the relationship between NPSHA and NPSHR?

    • A. NPSHA > NPSHR
    • B. NPSHA < NPSHR
    • C. NPSHA = NPSHR
    • D. NPSHA is unrelated to NPSHR

12. 60. What is 'system curve'?

    • A. A graph showing the head required to move a fluid through a piping system as a function of flow rate
    • B. A graph showing pump performance
    • C. A graph showing fluid properties
    • D. A graph showing pipe material