Question 1

The difference between the initial lift-off pressure and the pressure of the fully open position in a relief valve is called:

Accepted Answer

A)   actuation
B)   delta pressure
C)   accumulation
D)   actualizationE) None of the above
F) B) and C) C

Question 2

The flow control element and seat is called:

Accepted Answer

A)   the trim
B)   the gate
C)   the disc
D)   huddling chamberE) C) and D)
F) B) and C)

Question 3

Globe valves operate efficiently in:

Accepted Answer

A)   very viscous fluid systems
B)   infrequent use
C)   frequent use
D)   a & bE) None of the above
F) B) and C)

Question 4

The stem on a gate valve comes in two designs:

Accepted Answer

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

Question 5

An angle valve is classified as a:

Accepted Answer

A)   gate valve
B)   globe valve
C)   ball valve
D)   diaphragm valveE) A) and B)
F) A) and C)

Question 6

A control loop is:

Accepted Answer

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 & cE) A) and B)
F) None of the above

Question 7

Actuators come in three basic designs:

Accepted Answer

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

Question 8

Industrial air is used primarily to operate:

Accepted Answer

A)   purge tanks
B)   electric actuators, controllers, transducers
C)   hydraulic actuators, controllers, transducers
D)   pneumatic actuators, controllers, transducersE) A) and D)
F) B) and D)

Question 9

The body of the valve contains information referred to as:

Accepted Answer

A)   valve etchings
B)   bridge wall plate
C)   manufacturers specifications
D)   bridge wall markingsE) All of the above
F) A) and D)

Question 10

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

Accepted Answer

A)   hot pipe expansion and pipe thrust
B)   warping or thermal expansion
C)   induced fracture or energy refraction
D)   radiant expansion and tube fractureE) A) and B)
F) B) and C)

Question 11

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

Accepted Answer

A)   swing
B)   stop
C)   ball
D)   liftE) None of the above
F) A) and B)

Question 12

A recessed area specially designed to receive packing.

Accepted Answer

A)   stuffing box
B)   stuffing sleeve
C)   packing gland
D)   lantern ringE) A) and D)
F) A) and C) A

Question 13

A specially designed material that prevents leakage from the bonnet yet allows the hand wheel to turn evenly:

Accepted Answer

A)   mechanical seals
B)   segmental carbon rings
C)   labyrinth seals
D)   packingE) A) and B)
F) A) and C)

Question 14

A check valve is:

Accepted Answer

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

Question 15

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

Accepted Answer

A)   disc, body, seating area
B)   stem, bonnet, packing, stuffing box
C)   hand wheel, packing gland, gate
D)   body, flow control element, hand wheelE) A) and D)
F) A) and B)

Question 16

The outlet is larger on a:

Accepted Answer

A)   relief valve
B)   safety valveC) A) and B)
D) undefined B

Question 17

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

Accepted Answer

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 chamberE) A) and D)
F) C) and D)

Question 18

Select the group of quarter turn valves only:

Accepted Answer

A)   ball, gate, butterfly
B)   ball, plug, globe
C)   plug, angle, gate
D)   plug, ball, butterflyE) A) and B)
F) B) and C)

Question 19

Ball valves are frequently used for throttling service.

Accepted Answer

A) True 
 B)False

Question 20

Butterfly valves have ________ throttling characteristics.

Accepted Answer

A)   zero
B)   poor
C)   good
D)   excellentE) B) and D)
F) A) and C)

Exam 2: Valves

The difference between the initial lift-off pressure and the pressure of the fully open position in a relief valve is called:

Correct AnswerverifiedC

The flow control element and seat is called:

Correct AnswerverifiedShow Answer

Globe valves operate efficiently in:

Correct AnswerverifiedShow Answer

The stem on a gate valve comes in two designs:

Correct AnswerverifiedShow Answer

An angle valve is classified as a:

Correct AnswerverifiedShow Answer

A control loop is:

Correct AnswerverifiedShow Answer

Actuators come in three basic designs:

Correct AnswerverifiedShow Answer

Industrial air is used primarily to operate:

Correct AnswerverifiedShow Answer

The body of the valve contains information referred to as:

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

A recessed area specially designed to receive packing.

Correct AnswerverifiedA

A specially designed material that prevents leakage from the bonnet yet allows the hand wheel to turn evenly:

Correct AnswerverifiedShow Answer

A check valve is:

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

The outlet is larger on a:

Correct AnswerverifiedB

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

Correct AnswerverifiedShow Answer

Select the group of quarter turn valves only:

Correct AnswerverifiedShow Answer

Ball valves are frequently used for throttling service.

Correct AnswerverifiedShow Answer

Butterfly valves have ________ throttling characteristics.

Correct AnswerverifiedShow Answer

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C

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A

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B

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