Introduction to Valves
Showing posts with label Introduction to Valves. Show all posts
Showing posts with label Introduction to Valves. Show all posts

The advantage of a rising spindle steam stop valve is that:

The advantage of a rising spindle steam stop valve is that:





a. you can tell from a distance if the valve is open or closed
b. it provides a place to install isolation tags
c. it may be easily lubricated
d. the threaded part is not exposed to corrosion by the high temperature steam






Answer: A, C & D.

In order to ensure safe and continuous operation of a pressure reducing valve, the valve station should have:

In order to ensure safe and continuous operation of a pressure reducing valve, the valve station should have:



a. a safety valve on the downstream side
b. a by-pass loop, downstream safety valve. and a downstream pressure gauge.
c. the piping to the station made of at least Schedule 80 piping
d. a Y-strainer immediately after the valve
e. a metal rather than composition diaphragm





Answer: B

A check valve is a valve that:

A check valve is a valve that:



a. allows flow in one direction only
b. allows flow in two directions
c. allows flow at regular intervals
d. does not allow any flow at all
e. has a locking spindle





Answer: A

A gate valve:

A gate valve:




a. has less restriction in a line than a globe valve
b. should be operating either fully open or fully closed
c. is used to throttle flow
d. is used for different applications than a globe valve




Answer: A, B & D.

The by-pass around a regulating valve should contain a:

The by-pass around a regulating valve should contain a:



a. rising stem gate valve
b. non-rising stem gate valve
c. swing check valve
d. rising stem globe valve
e. lift type check valve





Answer: D

Service designation of a valve indicates the:

Service designation of a valve indicates the:



a. type of liquid used in the valve
b. type of gas used in the valve
c. temperature-pressure rating of the valve
d. maximum pipe fluid flow velocity
e. maximum viscosity of the fluid






Answer: C

In order to extend the life of valve packing we can:

In order to extend the life of valve packing we can:




a. operate the valve at lower temperatures
b. lubricate the packing regularly with oil
c. replace the packing annually
d. manipulate the valve slower
e. manipulate the valve on a regular basis





Answer: B

A globe valve:

A globe valve: 



a. has less restriction in a line than a gate valve
b. should be operated either fully open or fully closed
c. is used to throttle flow
d. is used for different applications than a gate valve





Answer: C & D.

All markings on valves shall be:

All markings on valves shall be:



a. painted with black paint
b. made with capital letters
c. covered for protection
d. legible
e. written vertically in capital letters






Answer: D

The material designation of a valve:

The material designation of a valve:



a. gives where the material is used
b. tells what material makes up the valve
c. gives the temperature to which the valve can be subjected
d. tell what the material is suited for
e. is not required for low pressure steam service





Answer: B
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