List the three subcategories of butterfly valves.

List the three subcategories of butterfly valves.

1) Swing-through
2) Large
3) Small
4) Lined
5) High performance


a. 1, 2, 3
b. 3, 4, 5
c. 1, 4, 5
d. 2, 3, 4
e. 1, 3, 5

Answer: C

List the two ways butterfly valves are installed into a piping system:

List the two ways butterfly valves are installed into a piping system:

1) Welded
2) Unions
3) Flanged
4) Wafer
5) Glues


a. 1, 2
b. 2, 3
c. 3, 4
d. 4, 5
e. 1, 5

Answer: C

The butterfly valve is often used as a final control element in ____ or large ______ piping systems.

The butterfly valve is often used as a final control element in ____ or large ______ piping systems. 

a. air, water
b. gas, bore
c. water, diameter
d. oil, fluid

Answer: A

List advantages of diaphragm valves:

List advantages of diaphragm valves:

1) The diaphragm is separated from the fluid and no packing material is required as in conventional valves.
2) Maintenance costs are much lower than conventional valves.
3) The bonnet assembly can be removed for cleaning or lubricating without shutting off the fluid in the line.
4) A positive tight seal is always maintained.
5) Diaphragm valves can be used in all services.


a. 1, 2
b. 2, 3
c. 1, 3
d. 3, 4
e. 2, 5

Answer: C

Describe Diaphragm Valve applications.

Describe Diaphragm Valve applications.

A. Flow control service when handling corrosive and toxic fluids.
B. Used extensively in raw water treatment plants, in sulfuric acid applications.
C. A stream lined valve for installation in small places.
D. Generally in services where bubble-tight or drip-tight closure is mandatory.
E. Mostly used for boiler feed water ingestion.


a. A, B, D
b. A, B, C, D
c. A, B, E
d. B, C, D, E

Answer: A

The diverting valve is a three-way valve, with _____ inlet and _____ outlets,

The diverting valve is a three-way valve, with _____ inlet and _____ outlets, 

a. two, one
b. small, large
c. one, two
d. one, three

Answer: C

What is the purpose of the bolted jacket's?

What is the purpose of the bolted jacket's? 

a. To strengthen the valve body
b. Prevent valve leaks
c. Provide a smooth surface for painting
d. Apply heat to the valve body

Answer: D

Generally, in gate valves, the parts most severely worn are the discs and seats.

Generally, in gate valves, the parts most severely worn are the discs and seats. 

a. True
b. False

Answer: A

Globe valves have the largest pressure drop or head loss of the valve types.

Globe valves have the largest pressure drop or head loss of the valve types.

a. True
b. False

Answer: A

A lined butterfly valve could be described as:

A lined butterfly valve could be described as:

1. Having flangeless or glanged connections and carbon steel or stainless steel bodies. With their very tight shutoff, heavy duty construction, and tight linkages, these valves are suitable for as many process applications as their sliding stem counterparts
2. Designed for use with corrosive fluids
3. Being handicapped by lack of tight shutoff


a) 1
b) 2
c) 3
d) 1, 2
e) 2, 3

Answer: B

Plug valve gland types include:

Plug valve gland types include:

1. Single gland
2. Double gland
3. Button gland
4. Bolted gland
5. Piston gland
6. Screwed gland



a) 1, 3, 4, 6
b) 1, 4, 6
c) 1, 2, 4, 6
d) 1, 3, 4, 5
e) 2, 4, 5, 6

Answer: B

The maximum temperature of fluids handled by a diaphragm valve must be below the temperature limit for the:

The maximum temperature of fluids handled by a diaphragm valve must be below the temperature limit for the:

a) Diaphragm material
b) Valve body material
c) Insulating material
d) Valve bonnet
e) Packing material

Answer: A

Which best describes a spring-loaded diaphragm actuator:

Which best describes a spring-loaded diaphragm actuator:

a) It has a diaphragm and a diaphragm plate connected to an actuator stem
b) The adjusting spring allows external setting or adjustment of the initial spring compression
c) It has no springs and is often used in applications requiring a valve positioner
d) They are employed in small size systems where on and off operation is required
e) The spring is connected to the diaphragm by the stem

Answer: A

The purpose of the bolted on jacket on some plug valves is to:

The purpose of the bolted on jacket on some plug valves is to:

a) Strengthen the valve body
b) PRevent valve leaks
c) Provide a smooth surface for painting
d) Allow the jackets to be removed
e) Add heating to a non-jacketed existing valve

Answer: E

Diaphragms are made of materials resistant to the particular fluids being transported. Choose four materials which are often used to manufacture diaphragms

Diaphragms are made of materials resistant to the particular fluids being transported. Choose four materials which are often used to manufacture diaphragms

1. Rubber
2. Neoprene
3. Cotton
4. Stainless steel
5. Polyethelene,
6. Zinc


a) 1, 4, 5, 6
b) 2, 4, 5, 6
c) 1, 2, 3, 5
d) 1, 2, 4, 5
e) 1, 2, 4, 6

Answer: D

Solenoid Valves are used in:

Solenoid Valves are used in:

1. Small size systems where on and off operation is required
2. Fuel gas systems as the latching valve
3. Cooling water systems
4. For continuous flow


a) 1, 2
b) 1, 3
c) 1, 4
d) 2, 3
e) 2, 4

Answer: A

A T-Ported component can be found in some ________ Valves

A T-Ported component can be found in some ________ Valves

a) Gate
b) Globe
c) Ball
d) Butterfly
e) Plug

Answer: E

Diaphragm valves have three basic parts: the valve _____, the valve _____ assembly, and the flexible disc or _____

Diaphragm valves have three basic parts: the valve _____, the valve _____ assembly, and the flexible disc or _____

a) Actuator, stem, body
b) Body, bonnet, diaphragm
c) Body, seat, packing
d) Inlet, outlet, seal
e) Top, bottom, partition

Answer: B

In a direct operating, electric actuator

In a direct operating, electric actuator

a) an actuator is used in place of the plunger
b) the plunger is connected directly to the disc of a globe valve
c) the plug is energized opening the valve
d) the plug is de-energized opening the valve
e) the solenoid is energized closing the valve

Answer: B

The mixing valve is designed with two _____ and one _____ for blending two fluids.

The mixing valve is designed with two _____ and one _____ for blending two fluids.

a) flanges, drain
b) stems, gate
c) drains, plug
d) glands, body
e) inlets, discharge

Answer: E