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7 Cards in this Set
- Front
- Back
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To control static pressure in the air ducts a differential pressure controller is installed. How does the controller control static pressure? 1) By modulating the damper on the discharge side of the fan 2) By grounding the ductwork and carrying the charge to a battery 3) By modulating the damper on the suction side of the fan 4) By decreasing air temperature 5) By increasing air temperature |
By modulating the damper on the suction side of the fan |
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Air conditioning with respect to heating coils is achieved in which of the following ways? 1) The selected mixing of warm return air and cooler outside air 2) A combination of tempering control functions 3) All of the above 4) Selective heating by passing air through the heating coils 5) Proportioning the amount of air flow through the face damper for heat addition or through the bypass dampers for no heat addition |
3) All of the above |
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When complete control systems become very complex, which control signal medium is preferred? 1) Electric 2) Digital 3) Pneumatic 4) Fibre optic 5) Electronic |
Pneumatic |
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The outdoor air damper may be split into two units to provide: 1) Maximum outside air during minimum exhaust air 2) Maximum outside air during minimum return air 3) Minimum outside air during maximum return air 4) Maximum outside air during maximum return air 5) Minimum outside air during maximum exhaust air |
Minimum outside air during maximum return air |
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A variable air volume system requires static pressure control on the _____ air duct system. 1) Exhaust 2) Return 3) Recycled 4) Ventilation 5) Supply |
Supply |
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The outdoor air damper positioner is interlocked with the supply fan: 1) To provide fan start on damper opening 2) So the damper will open on fan start 3) So the damper will close on fan start 4) To provide fan start on damper closing 5) To provide fan stop on damper opening |
So the damper will open on fan start |
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To provide a two-position damper equipped with a fan that provides 100% outdoor air with a ratio of damper opening, what is required? 1) An air mixer 2) A variable volume tank 3) Offset returned air duct 4) A three phase damper interchange 5) A gradual switch |
A gradual switch |
