Deck 2: Valves

Question 1

The flow control element and seat is called:

A) the trim
B) the gate
C) the disc
D) huddling chamber

Answer 1

the trim

Question 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

Answer 2

actuator

Question 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

Answer 3

plug, ball, butterfly

Question 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

Question 5

Pneumatic actuators come in three basic designs:

A) diaphragm, piston, vane
B) diaphragm, electric, motor
C) diaphragm, electric, hydraulic
D) pneumatic, solenoid, hydraulic

Question 6

Globe valves operate efficiently in:

A) very viscous fluid systems
B) infrequent use
C) frequent use
D) a & b

Question 7

Ball valves are frequently used for throttling service.

Question 8

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

Question 9

A safety valve is used primarily with:

A) liquids
B) gases
C) vapors
D) b & c

Question 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

Question 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

Question 12

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

A) shaft
B) stem
C) rotor
D) cylinder

Question 13

A relief valve is used primary with:

A) liquids
B) gases
C) vapors
D) a & c

Question 14

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

Question 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

Question 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

Question 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

Question 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

Question 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

Question 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

Question 21

Butterfly valves have ________ throttling characteristics.

A) zero
B) poor
C) good
D) excellent

Question 22

The stem on a gate valve comes in two designs:

A) rising and non-rising
B) moveable and fixed
C) replaceable and non-replaceable
D) all of the above

Question 23

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

A) swing
B) stop
C) ball
D) lift

Question 24

A recessed area specially designed to receive packing.

A) stuffing box
B) stuffing sleeve
C) packing gland
D) lantern ring

Question 25

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

Question 26

A butterfly valve can be used for:

A) throttling service
B) on-off service
C) cooling tower water service
D) all of the above

Question 27

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

Question 28

Check valve design(s) include:

A) swing check
B) ball check
C) lift check
D) all of the above

Question 29

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

Question 30

Diaphragm valves are used primarily for:

A) corrosive service
B) viscous service
C) throttling service
D) all the above

Question 31

The seats in a gate valve fall into two categories:

A) replaceable and fixed
B) labyrinth and mechanical
C) replaceable and moveable
D) self guiding and fixed

Question 32

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

Question 33

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

Question 34

The outlet is larger on a:

A) relief valve
B) safety valve

Question 35

A gate valve is closed by turning the hand wheel:

A) counter-clockwise
B) clock-wise

Question 36

Actuators come in three basic designs:

A) pneumatic, diaphragm, piston
B) pneumatic, electric, motor
C) pneumatic, electric, hydraulic
D) pneumatic, solenoid, hydraulic

Question 37

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

Question 38

Electrical actuators come in all of the following designs except:

A) solenoid
B) air-to-open
C) motor
D) a & c

Question 39

A check valve is:

A) an automatic valve
B) a throttling valve
C) good for controlling flow direction
D) a & c

Question 40

Automatic valves can be used to control:

A) pressure & level
B) temperature & flow & analytical
C) flow
D) all the above

Question 41

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

A) globe
B) butterfly
C) gate
D) ball

Question 42

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

Question 43

Ball valves are most closely related to:

A) butterfly valves
B) globe valves
C) plug valves
D) gate valves

Question 44

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

A) body
B) bonnet
C) hand wheel
D) stem and yoke

Question 45

Globe valves are primarily used for:

A) throttling service
B) on-off service
C) hydrocarbon service
D) infrequent service

Question 46

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

Question 47

An angle valve is classified as a:

A) gate valve
B) globe valve
C) ball valve
D) diaphragm valve

Question 48

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

Question 49

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