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Which of the following action will be performed in defrost cycle of heat pump?
In a heat pump, which of the following mode is best to charge with refrigerant?
Which of the following is the heat sink in heat pump cooling cycle?
When the frost is formed on the outdoor coil of heat pump:
What is the minimum SEER Rating of cooling as specified by US department of Energy?
What may be the possible cause for an insufficient heating or cooling in a heat pump?
The temperature which causes moisture in the air to condensate is …………………
The return air temperature of a 120000 Btu output furnace is measured as 550C and supply side air temperature is 750C. What would be CFM of furnace?
The resistance of an element ……………….. to the cross sectional area of it.
Which of the following is not an electronic sensor?
Which of the following is the state of refrigerant at outlet of indoor coil during cooling cycle?
Themisters are used to measure which of the following quantity?
When the length of the wire has increased, the resistance of the wire ……………………
What is the output voltage range of thermocouple temperature sensor?
In which of the following controls the signal transmission is air pressure?
The refrigerant circuit evacuation is said to be complete, when the vacuum pressure reaches ……….. microns or less?
In which of the following heat pump modes, the inside heat is moved to outside of the house?
When the capacitance sensor is used to measure fluid level in tank, the capacitance valve will ………….. with increase in fluid level.
In which of the following condition the reversing valve may not shift from heat to cool mode?
