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In the ducts, pressure of the air falls because of which of the following:
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Reverse reset means that as the signal from the secondary sensor drops, the setpoint of the controller decreases.
Refrigerated air–conditioning will ____:
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Which of the following controllers have setpoint and throttling range scales labeled in degrees F or C.
The quantity of air to be distributed to various rooms, wings or zones of the building should be in proportional to the load in the respective areas:
Which one of the following device wide range of operation characteristics:
_____ is the desired condition of a variable that is to be maintained
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Ultrasonic flow sensors is to measure which of the following:
In case of Proportional (P) control, there will not be any error:
Sealed bellows is used in measuring in which of the following:
Which one of the following is not an RTD:
______ operate on the principle that when a fluid flows around an obstruction in the flow stream
A sensor-transducer assembly is called a ______ :
The density of the water vapor is ____
Electronic controllers cannot modulate a pneumatic actuator:
Which of the following system can accommodate complex control and override schemes:
The Pitot – static tube can be used to measure _____ through the decrease:
A ______ duct with its high strength to weight ratio is suitable for distribution systems:
The larger the condenser area exposed to the moving airstream, the ____ the temperature of the refrigerant when it leaves the condenser
When there is an abrupt expansion in the duct, the pressure loss in the duct will be:
Which of the following cooling methods are generally found in large commercial and industrial applications:
