Question

question 34
a two - stage thermostat is common on a heat pump. its function is to
allow a setback setting for the thermostat for nights
allow the system to operate on high and low speed according to demand
activate the back - up heat when needed
engage both stages of a two - stage compressor
prevent a large surge in electrical demand when the heat pump and back - up heat come on

Explanation:

A two - stage thermostat on a heat pump controls the system to run at high or low capacity based on heating or cooling demand.

Answer:

allow the system to operate on high and low speed according to demand