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What can be measured with bi-metalic strip sensor?
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Which of the following is the possible cause heat pump not operating?
………………………… sensors are used to measure temperature in ducts, piper and tanks.
For every unit of electricity the heat pumps are capable of producing ………… or more units of heat.
The temperature –resistance characteristic of thermister is ……………
Which of the following component of heat pump heat transfer takes place?
Which of the following is not RTD?
Where does the defrost thermostat is located in heat pump?
In heat pump, what is the function of indoor coil in cooling cycle?
Which of the following sensor works without contact with measuring quantity?
The resistance of RTD ………………. With increase in temperature.
In which of the following heat pump cycle, the auxiliary heating element will be operated?
When 170 volts is supplied to 208/230 volts compressor ………..
Which of the following device is self powered control device?
What is the smallest leak that an electronic leak detector is cable of sensing per year?
In which of the following heat pump cycle, the auxiliary heating element will be operated?
Which of the following sensors are used to measure dew point?
What is the maximum allowed relative humidity to maintain indoor air quality as per ASHRAE?
Where does the defrost thermostat is located in heat pump?
If there is a voltage reading in voltmeter which is connected across thermostat terminals indicates ……………………
Which of the following is not a heat pump class?
In heat pump, what is the function of indoor coil in cooling cycle?
The amount of water vapor that moisture contains increases rapidly with increase in temperature.
Which of the sensors does not require external power supply?
In heat pump, what is the function of outdoor coil in cooling cycle?
The defrost thermostat closes when the temperature of outdoor coil drops to …………….
Which of the following are benefits of HVAC control system?
What is the smallest leak that an electronic leak detector is cable of sensing per year?
A bourdon tube sensor is used to measure ………..
Which of the following heating mechanism will have high efficiency?
