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HVAC Controls: Controlled Devices Quiz Questions Answers 2
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Question 1 of 12
1. Question
1 pointsHead developed by the pump is directly proportional to the cube of the speed of the pump:
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Question 2 of 12
2. Question
1 pointsThe best control stability is accomplished when there is a _____ relationship between the position of the valve stem and the heat output from the coil.
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Question 3 of 12
3. Question
1 pointsBypass Diversion method is the _____ efficient method for varying the flow to the heating coil:
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Question 4 of 12
4. Question
1 pointsA mixing valve can also be used in a bypass application to control the flow through the coil by placing the valve _____ of the coil:
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Question 5 of 12
5. Question
1 points______ is the number of positions an actuator will assume when the control signal is slowly changed 0 – 100%
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Question 6 of 12
6. Question
1 pointsThis is the ratio between the maximum normal flow and the minimum controllable flow:
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Question 7 of 12
7. Question
1 pointsThe higher the turndown ratio is, controllability will be better:
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Question 8 of 12
8. Question
1 pointsWhich of the following valve have good modulating characteristics near closed, but become insensitive to further opening at near full open
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Question 9 of 12
9. Question
1 pointsIn which of the following valve the flow is proportional to the position of the valve stem:
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Question 10 of 12
10. Question
1 pointsQuick opening valve gives a low flow capacity (Cv-value) compared to the valve size
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Question 11 of 12
11. Question
1 pointsValve characteristics for a typical cooling coil and a heating coil are same:
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Question 12 of 12
12. Question
1 pointsA Mixing Valve is used normally for radiator circuits:
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