Refer to the drawing of a spring-loaded air-operated valve. Upon a loss of air pressure, this valve will ___
|
|
0
|
431
|
March 4, 2021
|
After an adjustment of the packing gland on a valve that had a minor packing leak, an operator attempts to operate the valve, but finds the valve is stuck ___
|
|
0
|
533
|
March 6, 2021
|
Refer to the drawing of a hydraulically-operated valve that is shown in a throttled position ___
|
|
0
|
349
|
March 4, 2021
|
Which one of the following could be responsible for the difference between the initial and current steady-state conditions for the throttled valve ___
|
|
0
|
328
|
March 4, 2021
|
Why are gate valves generally not used to throttle water flow ___
|
|
0
|
338
|
March 5, 2021
|
In a comparison between globe valves and gate valves in the same water system application, globe valves ___
|
|
0
|
347
|
March 5, 2021
|
In a comparison between a globe valve and a gate valve in the same water system application, the gate valve has a ___ pressure drop when fully open and is the ___ choice for throttling
|
|
0
|
262
|
March 5, 2021
|
Consider a 3-inch gate valve and a 3-inch globe valve in the same flowing water system application ___
|
|
0
|
269
|
March 5, 2021
|
In a comparison between a typical gate valve and a typical globe valve in the same water system application with both valves fully open, the gate valve has a ___ pressure drop and is normally used in ___ flow applications
|
|
0
|
308
|
March 5, 2021
|
Consider a 3-inch gate valve and a 3-inch globe valve in separate but identical operating water systems ___
|
|
0
|
323
|
March 5, 2021
|
Which one of the following is a disadvantage associated with using a gate valve, versus a globe valve, to throttle flow in a cooling water system ___
|
|
0
|
293
|
March 5, 2021
|
After an adjustment of the packing gland on a valve that had a minor packing leak, the operator attempts to operate the valve, but finds that the valve is stuck ___
|
|
0
|
296
|
March 5, 2021
|
In a comparison between gate valves and globe valves in the same water system application, gate valves ___
|
|
0
|
386
|
March 5, 2021
|
A gate valve is generally a poor choice for throttling fluid flow because ___
|
|
0
|
626
|
March 5, 2021
|
Gate valves should not be used to throttle fluid flow because ___
|
|
0
|
329
|
March 5, 2021
|
Gate valves are most often used to ___
|
|
0
|
388
|
March 5, 2021
|
Globe valves are preferred over gate valves for throttling because ___
|
|
0
|
266
|
March 5, 2021
|
Some valve positioning (drive) devices are capable of stopping the valve between a fully open and a fully closed (throttled) position ___
|
|
0
|
432
|
March 5, 2021
|
Which one of the following valves is most likely to be used in a throttling application ___
|
|
0
|
342
|
March 5, 2021
|
In a comparison between ball valves and butterfly valves in the same cooling water system application, the valve that would typically experience the greater seat leakage when fully closed with a large differential pressure is the ___ valve
|
|
0
|
373
|
March 5, 2021
|
In a comparison between ball valves and butterfly valves in the same water system application, the valve that would typically be more leak-tight when fully closed with a high differential pressure is the ___ valve
|
|
0
|
600
|
March 5, 2021
|
In a comparison between ball valves and butterfly valves in the same water system application, the valve that typically would allow more leakage when fully closed with a high differential pressure is the ___ valve
|
|
0
|
399
|
March 5, 2021
|
In a comparison between butterfly valves and ball valves, ___ valves are generally more leak- tight in high pressure applications; and ___ valves generally exhibit the smaller pressure decrease when fully open
|
|
0
|
303
|
March 5, 2021
|
Refer to the drawing of a valve ___
|
|
0
|
521
|
March 5, 2021
|
An operator attempts to close a fully-open upright manual gate valve to isolate a pump in a cooling water system that has been cooled down for maintenance ___
|
|
0
|
440
|
March 5, 2021
|
Which one of the following describes the function and use of the backseat on a manual valve ___
|
|
0
|
390
|
March 5, 2021
|
A typical check valve is designed to ___
|
|
0
|
976
|
March 5, 2021
|
Which one of the following is the type of valve used to control the direction of fluid flow through a system and prevent backflow ___
|
|
0
|
536
|
March 5, 2021
|
A stop check valve is a type of check valve that ___
|
|
0
|
499
|
March 5, 2021
|
Check valves are normally used to prevent ___
|
|
0
|
511
|
March 5, 2021
|