In a wattmeter the coil that is connected in series measure which of the following:

The voltmeter has ______ internal resistance:

The power factor is the ratio of:

Which of the following factors affect the inductance of a coil:

Transformer operates on the principle of:

For the same input power to the motor, when the supply voltage increases current drawn by the motor will:

Black wire in electrical wiring represents:

Which of the following instrument is used after DE-energization of the  circuit:

6000 BTUs equals to ______ :

In psychrometric chart, which of the following is located at the bottom of the chart:

As higher the temperature of the air, moisture holding capacity of the air _______:

Water vapor temperature will be ______ compared to air temperature:

Oxygen must not be used for purging a refrigeration system:

Hotter temperatures mean that air has a greater capacity to hold water in suspension:

In converting from the Fahrenheit to the Celsius scale, _______ Fahrenheit is equal to one degree Celsius.

In Natural Draft Boilers the intensity of the draft is:

The coefficient of performance (COP) of a refrigeration system _______ with capacity: