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

Related Mcqs:

1. 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

2. In ordetjo obtain superheated steam, a superheater is added in an existing boiler. As as result, furnace vacuum will _________________?

   A. remain unaffected
   B. improve C. worsen
   C. may improve/worsen depending on size
   D. unpredictable

3. With increase in load, convection superheater has_______________________?

   A. drooping characteristic
   B. linear characterisstic
   C. rising characteristic
   D. flat characteristic
   C. none of the above

4. 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

5. The basic purpose of drum in boiler is to_____________________?

   A. serve as storage of steam
   B. serve as storage of feed water for water wall
   C. remove salts from water
   D. separate steam from water
   E. control level

6. The size of a boiler drum in pulverised fuel fired boiler,as its size and capacity, (steam pressure and flow ratings) increase __________________?

   A. increases
   B. decreases
   C. remains unchanged
   D. increases/decreases depending on steam temperature requirements
   E. unpredictable

7. The condition of steam in boiler drum is always ___________________?

   A. dry
   B. wet
   C. saturated
   D. supersaturated
   E. superheated

8. Increase in pressure at the outer edge of a drum of radius R due to rotation at corad/sec, full of liquid of density p will be___________________?

   A. pco2/?2
   B. pco2/?2/2
   C. 2pa2R2
   D. pa2R/2
   E. none of the above

9. The feed check valve is used in order to ______________________?

   A. regulate flow of boiler water
   B. check level of water in boiler drum
   C. recirculate unwanted feed water
   D. allow high pressure feed water to flow to drum and not allow reverse flow to take place
   E. none of the above

10. 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