Review valves and hydro, valve maintainces

Question 1

Angle valves operate in the same way as?

1)

Ball valves

2)

Gate valves

3)

Globe valves

4)

Plug valves

Answer 1

3)

Globe valves

Question 2

The valve installed on thermal storage tanks to prevent negative pressures is the?

1)

Pressure reducing valve

2)

Pressure relief valve

3)

Vacuum breaker

4)

Vacuum relief valve

Answer 2

3)

Vacuum breaker

Question 3

A swing check valve can be installed in the?

1)

Horizontal position only

2)

Vertical position only

3)

Horizontal or vertical facing upwards

4)

Downward position

Answer 3

3)

Horizontal or vertical facing upwards

Question 4

The valve that is often referred to as a “cock” or “bibb” is the?

1)

Ball valve

2)

Plug valve

3)

Globe valve

4)

Swing check valve

Answer 4

2)

Plug valve

Question 5

When fully open, the valve that has the highest restriction of flow is?

1)

Ball valve

2)

Gate valve

3)

Globe valve

4)

Plug valve

Answer 5

3)

Globe valve

Question 6

Valves made of malleable iron can be found in?

1)

Chemical waste lines

2)

Gas distribution systems

3)

High temperature systems

4)

Sub-zero temperatures

Answer 6

4)

Sub-zero temperatures

Question 7

A pressure reducing valve (PRV) station is required when?

1)

The PRV valve is over 1/2” diameter

2)

The PRV valve is over 3/4” diameter

3)

The PRV valve is over 1” diameter

4)

The PRV valve is over 1 1/4” diameter

Answer 7

3)

The PRV valve is over 1” diameter

Question 8

One type of valve used to prevent backflow in a piping system is a?

1)

Balancing valve

2)

Pressure vacuum breaker

3)

Stop and waste valve

4)

Vacuum relief valve

Answer 8

2)

Pressure vacuum breaker
Incorrect Response

Question 9

The most common factor that causes the pressure rating of a valve to drop is?

1)

Rust

2)

Incorrect installation

3)

Increased temperatures

4)

Increased flow rates

Answer 9

3)

Increased temperatures

Question 10

Three types of check valves are swing, lift and?

1)

Ball

2)

Globe

3)

Gate

4)

Plug

Answer 10

1)

Ball

Question 11

When stamped on the body of a valve, the initials WOG are an abbreviation for:

1)

Hot water, oil, or gas

2)

Water, oxygen, or gas

3)

Waste, oxygen, or gas

4)

Cold water, oil, or gas

Answer 11

4)

Cold water, oil, or gas

Question 12

The basic function of a pressure reducing valve is to?

1)

Either open or close to admit more or less water, as demanded by the system, at a relatively constant pressure.

2)

Control the pressure in the line by restricting the flow of water through the lines.

3)

Restrict the line pressure by controlling the pressure variation.

4)

Maintain the pressure variation by mechanically restricting to control pressure.

Answer 12

1)

Either open or close to admit more or less water, as demanded by the system, at a relatively constant pressure.

Question 13

A strainer must be installed on the high pressure side of a PRV to?

1)

Prevent dirt from plugging the pressure actuating jet.

2)

Prevent dirt erosion of the valve seat.

3)

Prevent dirt from becoming stuck between the disc and seat.

4)

Prevent pressure surging.

Answer 13

3)

Prevent dirt from becoming stuck between the disc and seat.

Question 14

“NO flow pressure” relative to PRV’s may be defined as?
Correct Answer
1)

Pressure maintained in the system by a PRV during no demand periods.

2)

Change in pressure below that which is needed to open the valve.

3)

Pressure maintained by the valve when water is flowing.
Incorrect Response
4)

Pressure below the reduced flow pressure which is needed to open the valve.

Answer 14

1)

Pressure maintained in the system by a PRV during no demand periods.

Question 15

A parallel PRV installation might be necessary to?

1)

Allow pressure reduction great than the reduction capability of a single PRV.

2)

Provide staged reduction in down feed risers in tall buildings.

3)

Allow the use of two smaller cheaper valves in place of one large, expensive valve and at the same time eliminate the use for a bypass.

4)

Provide two stage reduction for systems operating at two different pressures.

Answer 15

3)

Allow the use of two smaller cheaper valves in place of one large, expensive valve and at the same time eliminate the use for a bypass.

Question 16

One PRV in a parallel installation may be set in at a slightly higher opening pressure than the other to?

1)

Allow for reduction greater than the capacity of one PRV.

2)

Provide staged pressure reduction for high rise down feed riser installations.

3)

Allow a large valve/small valve installation with the small valve set to satisfy low flow demands.

4)

Allow for two stage reduction in systems operating at two different pressures.

Answer 16

3)

Allow a large valve/small valve installation with the small valve set to satisfy low flow demands.

Question 17

The boiling temperature of water at atmospheric pressure is?

1)

180˚F

2)

200˚F

3)

210˚F

4)

212˚F

Answer 17

4)

212˚F

Question 18

The temperature relief setting on a standard Temperature and Pressure Relief valve is?

1)

180˚F

2)

200˚F

3)

210˚F

4)

212˚F

Answer 18

3)

210˚F

Question 19

What is “blowdown” in the context of PSVs?

1)

The maximum pressure the valve can handle

2)

The difference between the set pressure and the reseating pressure

3)

The rate at which the valve discharges

4)

The pressure at which the valve opens

Answer 19

2)

The difference between the set pressure and the reseating pressure

Question 20

Which type of PSV is commonly used for compressible fluids like gases and vapors?

1)

Conventional spring-loaded PSV

2)

Pilot-operated PSV

3)

Balanced bellows PSV

4)

Lever-operated PSV

Answer 20

1)

Conventional spring-loaded PSV

Question 21

How often should PSVs be tested in high-risk applications?

1)

Every month

2)

Every year

3)

Every five years

4)

Every decade

Answer 21

2)

Every year

Question 22

What is the term for the testing method where the PSV is subjected to increasing pressure until it activates?

1)

Static testing

2)

Functional testing

3)

Burst testing

4)

Set pressure testing

Answer 22

4)

Set pressure testing

Question 23

Which of the following is true about a double disc gate valve?

1)

It is positioned between the tapered seats to form a seal

2)

The disc and seat are parallel to each other and are not tapered

3)

It consists of two pieces that sit between two matching tapered seats in the body

4)

It is hollow around the edges and solid across the centre portion

Answer 23

2)

The disc and seat are parallel to each other and are not tapered

Question 24

What is the recommended turn down ratio from the high pressure side to
the low pressure side of a pressure reducing valve?

1)

20 to 1

2)

5 to 1

3)

1 to 1

4)

10 to 1

Answer 24

4)

10 to 1

Question 25

For steam service, the valve recognized as the best is the?

1)

Solid wedge gate valve

2)

Globe valve

3)

Gate valve

4)

Ball valve

Answer 25

1)

Solid wedge gate valve

Question 26

What is the principle behind the working of hydraulic systems?

1)

Pascal’s law

2)

Newton’s third law

3)

Archimedes’ principle

4)

Bernoulli’s principle

Answer 26

1)

Pascal’s law

Question 27

Which component in a hydraulic system converts hydraulic energy into mechanical energy?

1)

Pump

2)

Actuator

3)

Reservoir

4)

Filter

Answer 27

2)

Actuator

Question 28

What is cavitation in a hydraulic system?

1)

The formation of bubbles in the hydraulic fluid

2)

The cleaning of hydraulic fluid

3)

The process of pressurizing hydraulic fluid

4)

The conversion of hydraulic energy

Answer 28

1)

The formation of bubbles in the hydraulic fluid

Question 29

When cut grooving steel pipe for a hydraulic system what is the minimum
wall thickness of pipe required?

1)

Schedule 10.

2)

Schedule 40

3)

Schedule 80

4)

Schedule 160

Answer 29

3)

Schedule 80

Question 30

Which type of hydraulic control valve can vary the flow rate proportional to an input signal?

1)

Directional control valve

2)

Pressure relief valve

3)

Proportional valve

4)

Check valve

Answer 30

3)

Proportional valve

Question 31

What is the role of a sequence valve in a hydraulic system?

1)

To filter contaminants

2)

To maintain a set pressure

3)

To ensure operations occur in a specific sequence

4)

To store hydraulic fluid

Answer 31

3)

To ensure operations occur in a specific sequence

Question 32

The term “prime mover” refers to the?

1)

Power source which drives the pump

2)

Input component of a hydraulic system

3)

Output component of a hydraulic system

4)

Actuator of a hydraulic system

Answer 32

1)

Power source which drives the pump

Question 33

A spring-centered directional control valve has how many position(s)?

1)

One

2)

Two

3)

Three

4)

Four

Answer 33

3)

Three

Question 34

A linear or rotary device used to convert fluid power into mechanical motion and force would be a good definition of?

1)

Pump

2)

Motor

3)

Piston

4)

Actuator

Answer 34

4)

Actuator

Question 35

A fixed displacement pump has?

1)

Varying flow rates at a constant pump speed

2)

Varying pump speeds at a constant flow rate

3)

A constant flow rate at a constant pump speed

4)

Varying volume, pressure, and temperature capacity

Answer 35

3)

A constant flow rate at a constant pump speed

Question 36

“Pressure” is defined as?

1)

A force moving through a distance

2)

A force moving through a distance in a given time

3)

A force acting over a given area

4)

A force applied to a load

Answer 36

3)

A force acting over a given area

Question 37

What is the most effective method for removing deposits from a valve?

1)

Using a hammer

2)

Applying a solvent

3)

Using compressed air

4)

Heating the valve

Answer 37

2)

Applying a solvent

Question 38

How often should regular valve inspections be conducted in a high-use system?

1)

Annually

2)

Monthly

3)

Weekly

4)

Daily

Answer 38

2)

Monthly

Question 39

What material is commonly used for valve seats in high-temperature applications?

1)

Plastic

2)

Rubber

3)

Metal

4)

Teflon

Answer 39

3)

Metal

Question 40

Which standard is commonly used for valve testing in the oil and gas industry?

1)

ASME B16

2)

API 598

3)

ISO 9001

4)

ASTM D2000

Answer 40

2)

API 598

Question 41

What is the purpose of a backseat test in a valve?

1)

To ensure proper flow direction

2)

To check the integrity of the stem seal

3)

To evaluate the actuator performance

4)

To test the valve’s pressure rating

Answer 41

2)

To check the integrity of the stem seal

Question 42

Which material is commonly used for constructing test manifolds in high-pressure applications?

1)

Plastic

2)

Aluminum

3)

Stainless steel

4)

Carbon Steel

Answer 42

3)

Stainless steel

Question 43

What type of valve is commonly used in test manifolds for precise flow control?

1)

Ball valve

2)

Globe valve

3)

Needle valve

4)

Gate valve

Answer 43

3)

Needle valve