36.2

Which component in a heating thermostat is responsible for ensuring that the plenum does not exceed safe temperatures?

• Thermistor

• Bimetal coil

• Sensing bulb and diaphragm/bellows

• Limit switch

What is the function of the bimetal coil in a heating thermostat?

• To ensure safety control

• To sense temperature changes

• To provide electrical contacts

• To control the plenum temperature

What happens to the temperature in a conditioned space after the furnace shutdown due to system overshoot?

• The temperature decreases below the set point

• The temperature remains constant

• The temperature fluctuates randomly

• The temperature raises above the set point

What is the purpose of heat anticipators in thermostats?

• To cool down the thermostat

• To increase the temperature of the conditioned space by 5°F

• To warm the thermostat about 1°F over the conditioned space

• To maintain constant temperature in the conditioned space

Heat anticipators are designed to:

• Turn on the system early

• Increase system efficiency by maintaining longer cycles

• Help reduce system overshoot

• Increase the temperature differential in the thermostat

Heat anticipators can be:

• Only fixed

• Only adjustable

• Either fixed or adjustable

• Neither fixed nor adjustable

What turns off the system early in a thermostat equipped with a heat anticipator?

• The bimetal strip

• The magnet

• The anticipator

• The C (common) terminal

What is the purpose of cooling anticipators in thermostats?

• To cool down the thermostat during the Off cycle

• To heat up the thermostat during the On cycle

• To warm the thermostat during the Off cycle

• To maintain a constant temperature

Why are cooling anticipators used in thermostats?

• To increase system efficiency

• To prevent system lag

• To indicate temperature levels

• To shut down the system

What do combination thermostats operate?

• Only heating systems

• Only cooling systems

• Both heating and cooling systems

• Only humidity control systems