Deck 14: Piping and Valves

Question 1

What is the connection method of choice for critical service piping?

A) Flared
B) Welded
C) Soldered
D) Threaded

Answer 1

B
Explanation: A) Incorrect. Welded joints are usually the connection method of choice for critical service piping.
B) Correct. Welded joints are usually the connection method of choice for critical service piping.
C) Incorrect. Welded joints are usually the connection method of choice for critical service piping.
D) Incorrect. Welded joints are usually the connection method of choice for critical service piping.

Question 2

What should you do to verify valve position?

A) Make sure there are no leaks
B) Examine the valve for excessive wear
C) Check that the correct type valve is used in the correct way
D) Make sure the valve stems are properly lubricated

Answer 2

C
Explanation: A) Incorrect. To verify the valve position, check that the correct type valve is used in the correct way.
B) Incorrect. To verify the valve position, check that the correct type valve is used in the correct way.
C) Correct. To verify the valve position, check that the correct type valve is used in the correct way.
D) Incorrect. To verify the valve position, check that the correct type valve is used in the correct way.

Question 3

What type of fitting allows four pipes to be connected together at 90-degree angles?

A) Tee
B) Cross
C) Elbow
D) Union

Answer 3

B
Explanation: A) Incorrect. A tee is used to allow flow to two different pipes that are 90-degrees apart.
B) Correct. A cross allows four pipes to be connected together at 90-degree angles.
C) Incorrect. An elbow is a pipe fitting with a 45- or 90-degree angle that is used to change the direction of flow.
D) Incorrect. A union is a pipe fitting that joins two sections of threaded pipe but allows them to be disconnected without cutting or disturbing the position of the pipe.

Question 4

What piping is connected using male and female threads?

A) Threaded
B) Flange
C) Welded
D) Bonded

Question 5

What type of fitting is a short length of pipe with threads on both ends?

A) Tee
B) Nipple
C) Union
D) Coupling

Question 6

What can cause damage to the valve to the point that it will not seat and stop flow when closed?

A) Opening or closing a valve
B) Throttling a valve that is not designed for throttling
C) Failure to clean and lubricate valve stems
D) Improper closing of a valve on a high-pressure line

Question 7

What safety device opens more slowly and with less volume?

A) Safety valve
B) Relief valve
C) Globe valve
D) Valve actuator

Question 8

What is the most common type of material for piping?

A) Iron
B) Plastics
C) Carbon steel
D) Stainless steel

Question 9

What type of valve is a flow-regulating device that uses a disc-shaped flow-control element to increase or decrease flow?

A) Ball check valve
B) Lift check valve
C) Swing check valve
D) Gate valve

Question 10

What type of valve is flow-regulating device that uses a flexible, chemical resistant, rubber-type diaphragm to control flow instead of a typical flow-control element?

A) Gate valve
B) Diaphragm valve
C) Globe valve
D) Relief valve

Question 11

What valve should be used if the fluid passing through is very thick or corrosive?

A) Ball
B) Butterfly
C) Globe
D) Diaphragm

Question 12

What causes valve stem seizure or thread damage makes the valve difficult to open and close?

A) Excessive force when opening or closing a valve
B) Throttling a valve that is not designed for throttling
C) Failure to clean and lubricate valve stems
D) Improper closing of a valve on a high-pressure line

Question 13

What type of valve is a flow-regulating device that uses a flow-control element shaped like a hollowed out ball, attached to an external handle, to increase or decrease flow?

A) Ball valve
B) Plug valve
C) Butterfly valve
D) Check valve

Question 14

Which of the following is the symbol for a gate valve?

A)
B)
C)
D)

Question 15

What type of valves are used in service as single-direction flow control?

A) Check valves
B) Actuated valves
C) Pressure relief valves
D) Manually operated valves

Question 16

What can cause leakage and make the valve difficult to open or close?

A) Excessive force when opening or closing a valve
B) Throttling a valve that is not designed for throttling
C) Failure to clean valve stems
D) Improper closing of a valve on a high-pressure line

Question 17

What type of weld is used if one pipe is small enough to fit snugly inside the other?

A) Glue weld
B) Butt weld
C) Brazed weld
D) Socket weld

Question 18

What construction material can be used in high-temperature applications?

A) Alloys
B) Copper
C) Carbon steel
D) Plastics

Question 19

What type of fitting fits over the open end of a pipe to seal it?

A) Cap
B) Plug
C) Bushing
D) Coupling

Question 20

What can result from improper material selection?

A) Leaks
B) Wasted product
C) Hazardous conditions
D) All of the above

Question 21

Which of the following is the symbol for a safety valve?

A)
B)
C)
D)