Higher the temperature difference, _____ will be heat transfer rate:

During the defrost cycle, the heat pump switches from ______ to _______:

Low pressure steam contains ______ latent heat per pound compared to high pressure steam:

When it is extremely cold outside, it is _____ economical to use heat pump compared to other heat sources (electric resistance heater, oil furnace, or gas furnace)

When there is a high temperature differential, it takes _____ work for the heat pumps to move the same amount of heat to indoors than on a milder day

The heat pump is a heat multiplier:

Low-pressure boilers are limited to a maximum working pressure of _____ :

Heat transfer will occur when temperature difference exist within the same medium.

In case of the electrically operated heat pumps, the heat transferred can be _____ times larger than the electrical power consumed

________ is a process of reduction of oil into small droplets

On the Fahrenheit scale, absolute zero is _____

Heat pumps takes ____ air and makes it ____ air

The boiling point or boiling temperature of water can be changed by changing the pressure on the water:

When there is a wide temperature differential between the hot and cold reservoirs, the COP is ______:

Hot water heating system produces heat less consistently than steam heating system

Absolute-zero temperature is the base point for calculations of heat