Safety valves are provided in chemical equipments to guard against excessive_________________?

Related Mcqs:

1. A ‘rupture disc’ is provided in chemical equipments as an accessory meant for ___________________?

   A. Relieving excess pressure
   B. Creating turbulence
   C. Enhancing mixing rate
   D. Avoiding vortex formation

2. Factor of safety (i.e., overdesign factor) in heat transfer equipments is about _____________ percent more than the actual/theoretical design factor?

   A. 5-10
   B. 15-20
   C. 30-35
   D. 35-40

3. Apex angle of conical heads used in the bottom heads of chemical process equipments is usually__________________?

   A. 30°
   B. 45°
   C. 60°
   D. 75°

4. (Le/D) for fully open gate valves would be __________________?

   A. Much more than that for fully open globe valves
   B. Much less (say 2% than that for fully open globe valves)
   C. Around 7
   D. Both B. and C.

5. Needle valves are generally not used for___________________?

   A. Very large diameter pipes
   B. High pressure throttling service
   C. Very accurate flow control
   D. Smaller sizes of pipe

6. Brass valves are usually made for pipe sizes ______________ inches?

   A. ≤ 1
   B. ≤ 2
   C. > 2.5
   D. > 3.5

7. For high pressure process equipments/vessels, the connected nozzle should be____________________?

   A. Welded
   B. Screwed
   C. Flanged
   D. Brazed

8. Compensation against openings in process vessels for giving inlet and outlet connections, for providing sight glasses and manholes etc. is provided for strength and rigidity. The most efficient type of compensation is of _______________ type?

   A. Nozzle or rim
   B. Flared out
   C. Fluid in
   D. Ring plate

9. The design stress, which is more than the damaging stress, is the least unit stress that will render a member unfit for service before the end of its normal life. The design stress factor or factor of safety indicates the margin between design stress and the _______________ stress?

   A. Working
   B. Damaging
   C. Allowable
   D. None of these

10. Correct use of ‘factor of safety’ is very important in equipment design. It is defined as the ratio of the___________________?

    A. Ultimate stress to breaking stress
    B. Ultimate stress to working stress
    C. Working stress to ultimate stress
    D. None of these