Industrial Engineering Chapter 2 Valves Test All The Above Depending Design Check Valve

CHAPTER 2 VALVES TEST

1. The flow control element and seat is called:

a. the trim

b. the gate

c. the disc

d. huddling chamber

2. A device mounted on a valve that is used to automatically position the flow control element:

a. positioner

b. accumulator

c. actuator

d. throttler

3. Select the group of quarter turn valves only:

a. ball, gate, butterfly

b. ball, plug, globe

c. plug, angle, gate

d. plug, ball, butterfly

4. The flow control element of this valve comes in the following designs; plug, composition, needle

and ball:

a. gate

b. globe

c. plug

d. ball

5. Pneumatic actuators come in three basic designs:

a. diaphragm, piston, vane

b. diaphragm, electric, motor

c. diaphragm, electric, hydraulic

d. pneumatic, solenoid, hydraulic

6. Globe valves operate efficiently in:

a. very viscous fluid systems

b. infrequent use

c. frequent use

d. a & b

7. Ball valves are frequently used for throttling service.

a. true

b. false

8. Ball valves provide very little restriction to flow when they are open.

a. true

b. false

9. A safety valve is used primarily with:

a. liquids

b. gases

c. vapors

d. b & c

10. The body of the valve contains information referred to as:

a. valve etchings

b. bridge wall plate

c. manufacturers specifications

d. bridge wall markings

11. When the seats are damaged by high velocity gas they are referred to as:

a. steam cut

b. wire cut

c. wire drawn

d. a & c

12. The _______ is a long slender shaft attached to the gate.

a. shaft

b. stem

c. rotor

d. cylinder

13. A relief valve is used primary with:

a. liquids

b. gases

c. vapors

d. a & c

14. Because of its unique design, ball valves do not need seats.

a. true

b. false

15. The ________ provides a housing for the gate or disc when it is lifted out of the process flow.

a. body

b. stem

c. bonnet

d. casing

16. Gate valve flow control elements come in three basic designs:

a. solid wedge, split parallel, double disc

b. solid wedge, solid disc, parallel disc

c. double disc, parallel disc, solid wedge

d. solid split, solid wedge, parallel disc

17. The typical globe valve has all of the following components except:

a. disc, body, seating area

b. stem, bonnet, packing, stuffing box

c. hand wheel, packing gland, gate

d. body, flow control element, hand wheel

18. A process technician can look at a rising stem gate valve and determine whether it is:

a. wide open

b. partially open

c. closed

d. all of the above

19. Globe valves utilize all of the following flow control element designs except:

a. plug type disc

b. composition disc

c. parallel disc

d. needle disc

20. Ball valves can be fully opened or closed with a(n):

a. eighth of a turn

b. quarter turn

c. half turn

d. full turn

21. Butterfly valves have ________ throttling characteristics.

a. zero

b. poor

c. good

d. excellent

22. The stem on a gate valve comes in two designs:

a. rising and non-rising

b. moveable and fixed

b. replaceable and non-replaceable

c. all of the above

23. Globe valves have:

a. greater pressure drop than a ball valve.

b. greater pressure drop than a gate valve

b. greater pressure drop than an angle valve

c. all of the above

24. The only check valve that can be manually adjusted by a technician is:

a. swing

b. stop

c. ball

d. lift

25. A recessed area specially designed to receive packing.

a. stuffing box

b. stuffing sleeve

c. packing gland

d. lantern ring

26. The packing gland bolts and nuts:

a. should never be tightened during valve operation.

b. can be tightened during valve operation.

c. Should be lubricated periodically.

d. b & c

27. A butterfly valve can be used for:

a. throttling service

b. on-off service

c. cooling tower water service

d. all of the above

28. The typical globe valve directs flow:

a. under the flow control element

b. above the flow control element

c. against the side of the flow control element

d. All of the above depending on design

29. Check valve design(s) include:

a. swing check

b. ball check

c. lift check

d. all of the above

30. A check valve responds to the following scientific principle:

a. fluid flow and gravity

b. pressure and temperature

c. density and viscosity

d. laminar and turbulent flow

31. Diaphragm valves are used primarily for:

a. corrosive service

b. viscous service

c. throttling service

d. all the above

32. The seats in a gate valve fall into two categories:

a. replaceable and fixed

b. replaceable and moveable

b. labyrinth and mechanical

c. self guiding and fixed

33. Diaphragm valves come in the following designs:

a. vapor and liquid

b. hydrocarbon and non-hydrocarbon

c. weir and non-weir

d. diaphragm and non-diaphragm

34. A specially designed material that prevents leakage from the bonnet yet allows the hand wheel to

turn evenly:

a. mechanical seals

b. segmental carbon rings

c. labyrinth seals

d. packing

35. The outlet is larger on a:

a. relief valve

b. safety valve

36. A gate valve is closed by turning the hand wheel:

a. counter-clockwise

b. clock-wise

37. Actuators come in three basic designs:

a. pneumatic, diaphragm, piston

b. pneumatic, electric, motor

c. pneumatic, electric, hydraulic

d. pneumatic, solenoid, hydraulic

38. The typical gate valve has all of the following components except:

a. body, seating area, solid wedge gate

b. stem, bonnet, packing, yoke bushing

c. stuffing box, packing gland, hand wheel

d. valve stem, double disc feather, huddling chamber

39. Electrical actuators come in all of the following designs except:

a. solenoid

b. air-to-open

c. motor

d. a & c

40. A check valve is:

a. an automatic valve

b. a throttling valve

c. good for controlling flow direction

d. a & c

41. Automatic valves can be used to control:

a. pressure & level

b. temperature & flow & analytical

c. flow

d. all the above

42. Places a moveable metal gate in the path of a process flow:

a. globe

b. butterfly

c. gate

d. ball

43. A term used to describe temperature changes and pipe expansion is:

a. hot pipe expansion and pipe thrust

b. warping or thermal expansion

c. induced fracture or energy refraction

d. radiant expansion and tube fracture

44. Ball valves are most closely related to:

a. butterfly valves

b. globe valves

c. plug valves

d. gate valves

45. The ________ in a gate valve represents the largest part of the valve.

a. body

b. bonnet

c. hand wheel

d. stem and yoke

46. Globe valves are primarily used for:

a. throttling service

b. on-off service

c. hydrocarbon service

d. infrequent service

47. The difference between the initial lift-off pressure and the pressure of the fully open position in a

relief valve is called:

a. actuation

b. delta pressure

c. accumulation

d. actualization

48. An angle valve is classified as a:

a. gate valve

b. globe valve

c. ball valve

d. diaphragm valve

49. Industrial air is used primarily to operate:

a. purge tanks

b. electric actuators, controllers, transducers

c. hydraulic actuators, controllers, transducers

d. pneumatic actuators, controllers, transducers

50. A control loop is:

a. a series of electric switches designed to control a process.

b. a sensing element, transmitter, controller, transducer, and control valve.

c. a collection of instruments that work together to automatically control a process.

d. b & c

Answer Key CHAPTER 2 Valves