Which of the following tubings shall not be used in ammonia refrigeration systems:

Which of the following device oppose any change in the circuit voltage:

Shaded pole motors are not self starting like capacitor start motors:

The cooling capacity of the refrigeration system is automatically adjusted to match the cooling load by changing the position of the ______ inlet guide vanes:

_______ is the small amount of water lost in the form of fine droplets retained by the circulating air:

The ______ the wet bulb temperature of the incoming air in the cooling tower, the more efficient the air is in decreasing the temperature of the water being fed into the tower:

Galvanic corrosion reaction is basically have which of the nature:

Which of the following device has the prime importance to prevent the floodback of slugs of liquids through the suction line to the compressor:

The ________ of vaporization is the measure of the heat per pound that the refrigerant can absorb from an area to be cooled:

Which of the following has least tendency to leak:

The AH compressors are rated in ______:

In capacitor start and run motor arrangement, start capacitors and run capacitors are arranged in _______ with eachother:

The current type relay is generally used with small refrigeration compressors upto ______ :

Remote condensing units are likely to have long horizontal suction lines or vertical risers exceeding ________ in height in the suction lines:

To minimize the possibility of freeze-up or corrosion, the maximum safe limits of moisture in Refrigerant R-22 is:

As the number of passes in firetube boiler increases, its efficiency will _____ :

______ are preferred for high volume and low pressure applications: