The feed check valve is used in order to ______________________?

Related Mcqs:

1. The safety valve at superheater as compared to drum safety valve setting is set at___________________?

   A. higher value
   B. lower value
   C. same value
   D. any value
   E. none of the above

2. The safety valve on boiler drum compared to safety valve on super heater is set at ________________?

   A. same value
   B. higher value
   C. lower value
   D. lower/higher depending on steam flow
   E. unpredicatble

3. A safety valve in a locomotive starts leaking. The leaking medium will be_________________?

   A. water
   B. dry steam
   C. wet steam
   D. super heated steam
   E. supersaturated steam

4. Leakage past the piston rings and valve seats in I.C. engines with increase in speed_______________?

   A. increases.
   B. decreases
   C. remains same
   D. unpredictable
   E. none of the above

5. Flow occurring in a pipeline when a valve is being opened is________________?

   A. steady
   B. unsteady
   C. laminar
   D. vortex
   E. rotational

6. During the opening of a valve in a pipe line, the flow is_________________?

   A. steady
   B. unsteady
   C. uniform
   D. laminar
   E. free vortex type

7. What is the most common valve used in piping systems to throttle or regulate flow ?

   A. Globe valve
   B. Gate valve
   C. Butterfly valve
   D. Plug valve

   Submitted by: Faheem Zaman Dhaunroo

8. The basic job of feed water treatment in boilers is to overcome the problem of __________________?

   A. corrosion
   B. scale
   C. carryover
   D. embrittlement
   E. all of the above

9. Deaeration of feed water is carried out because it reduces ____________________?

   A. cavitation of .boiler feed pumps
   B. corrosion caused by oxygen
   C. heat transfer coefficient
   D. pH value of water
   E. weight of water to be handled

10. Feed water conditioning in thermal power plants in done to__________________?

    A. reduce hardness and for removal of solids
    B. increase efficiency-of thermal power plant
    C. increase *heat transfer rate
    D. increase steam parameters
    E. all of the above