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15 Cards in this Set
- Front
- Back
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Gate valves should not be used to ?
A. Start flow B. Stop flow C. Throttle flow D. Control an on/off process |
Throttle flow |
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If you wanted to start and stop low pressure two way flow in a paper mill, you would use a ____ valve?
A. Check B. Butterfly C. Knife gate D. Needle |
Knife gate valve |
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Which of the following valves is a rotary - action valve?
A. Gate B. Needle C. Globe D. Ball |
Ball valve |
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Which of the following valves is easily adapted to multiport construction?
A. Gate B. Plug C. Globe D. Knife |
Plug valve |
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A globe valve that closes against the direction of fluid flow is said to be ?
A. Flow-to-close B. Flow-to-open C. Fail-to-open D. Fail-to-close |
Flow to open |
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One disadvantage of the globe valve is ?
A. High head loss B. Inability to regulate flow C. High seat leakage D. Inability to serve in quick-acting start-stop applications |
High head loss |
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When looking at an illustration of valve plug and seat installation , if the taper of the plug goes from wide to narrow from top to bottom, the plug must travel ?
A. Up to close, down to open B. Down to close, up to open C. Down to close, down to open D. Up to close, up to open |
Down to close, up to open |
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Which valves discharge conditions are so favorable that many control valves are based on it?
A. Gate B. Plug C. Globe D. Butterfly |
Globe |
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A needle valve may be used when an application requires?
A. Fine adjustment of flow B. Coarse adjustment of flow C. On -off control D. Slurry flow |
Fine adjustment of flow |
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Relief valves are normally used in liquid services ?
A. True B. False |
True |
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A swing check valve requires a counter weight if used in a ____ application ?
A. Horizontal B. Vertical C. Steam D. Liquid |
Vertical |
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The fail safe position of any automatically actuated valve is the closed position ?
A. True B. False |
False |
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When you choose among valves , you would find the largest pressure drop in the ____ valve?
A. Globe B. Gate C. Ball D. Butterfly |
Globe valve |
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If a gate valve has a flow arrow indicated on it, it is because the gate valve has a _______?
A. Single gate B. Double gate C. Bridgewall marking D. Vent port |
Vent port |
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Fitting that are marked Lh on the outside wall indicates ??
A. Low heat B. Liquid hydrogen only C. Left- hand threads D. Low hardening material |
Left- hand threads |
