Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

M-07, Inspecting, Operating, and Maintaining Main Line and Curb Valves > Valve Types > Flashcards

Valve Types Flashcards

1
Q

The most common type of meter valve used on eversource gas facilities is a ______.

A

Plug Valve

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

A valve with a cylindrical or tapered opening controlling gas flow is called what?

A

Plug Valve

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

Plug valves are considered restricted port valves TRUE or FALSE ?

A

TRUE

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

Plug valves require what to seal and move?

A

Lubrication, Grease

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

Plug valves are usually require a ______ turn to open or close, however gear operated valves require multiple turns to achieve full travel.

A

Quarter

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

A valve with a round plug controlling the flow of gas is called what?

A

Ball valve

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

Ball valves are classified as ______ valves. However full port ones do exist.

A

Restricted port

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

Ball valves are made of either ______ or _____.

A

Steel, Plastic

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

Ball valves require a _____ turn to open or close.

A

Quarter

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

A ______ valve has the best seating of all the valves, at the highest cost.

A

Ball

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

STEEL ball valves require ____ not greasing for maintenance.

A

Flushing

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

PLASTIC ball valves are neither flushed or greased for maintenance TRUE or FALSE?

A

TRUE

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

A double block valve has multidirectional seals on both sides of the valve body TRUE or FALSE?

A

TRUE

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

A Low cost ball valve that’s used in gas distribution and customer meter fits is called what?

A

Non-serviceable ball valve

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

A valve designed for a long, leak-free life is called a what?

A

Non-serviceable ball valve

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

A valve with a welded body and no service fittings is called what?

A

Non-serviceable ball valve

17
Q

A valve with a disk that turns 90 degrees inside the body to control the flow of gas is called what?

A

Butterfly valve

18
Q

Butterfly valves are always restricted port TRUE or FALSE?

A

TRUE

19
Q

Butterfly valves are ______ turn, typically requiring left or counterclockwise turns to open the valve.

A

Multi

20
Q

Butterfly valves contain service ports for grease or sealant TRUE or FALSE?

A

FALSE

21
Q

Butterfly Valves provide good and positive gas service shut-off TRUE or FALSE?

A

FALSE

22
Q

______ valves operate by raising and lowering a horizontal disc on and off a seat.

A

Globe

23
Q

In ____ valves gas flow changes direction as it passes through the valve.

A

Globe

24
Q

Globe valves are considered restrictive port valves TRUE or FALSE?

A

TRUE

25
Q

Are Globe valves multi or quarter turn valves?

A

Multi

26
Q

_____ valves operate by raising and lowering a vertical metal disc, across the opening of a pipe.

A

Gate

27
Q

_____ valves have seats on both sides, and glas flows straight through the valve.

A

Gate

28
Q

Gate valves are considered full port valves TRUE or FALSE?

A

TRUE

29
Q

Gate valves can be used for throttling, TRUE or FALSE?

A

FALSE

30
Q

Gate valves are have a service port for the seat and stem, TRUE or FALSE

A

FALSE

31
Q

Check valves are designed for ______.

A

Metering

32
Q

______ valves operate by allowing gas flow to swing the valve open, and if the gas flow reverses direction, the valve is forced closed.

A

Check

33
Q

Check valves include _____, _____, and _____ type designs.

A
  • Swing
  • Lift
  • Ball
34
Q

_________ valves are designed to automatically restrict or stop glas flow when certain limits are reached, and provide leak protection for customer piping.

A

Excess Flow

35
Q

Injecting sealant into a valve, provides what 2 benefits?

A
  • Bubble tight shut off
  • Lubrication of moving parts
36
Q

Who must be notified prior to any valve maintenance?

A

Gas Control

37
Q

A grease gun is the preferred method of of sealing and lubricating a valve, TRUE or FALSE ?

A

TRUE

M-07, Inspecting, Operating, and Maintaining Main Line and Curb Valves (6 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2025 Bold Learning Solutions. Terms and Conditions