Gas furnace parts

An inducer motor draws __________ air into the furnace.

• Hot

• Warm

• Cold

• Combustion

An inducer motor creates a negative draft closing the __________ switch contacts.

• pressure

• limit

• rollout

• thermostat

When checking pressure switches the best practice is to use __________.

• high pressure gauge

• low pressure gauge

• manometer

• gas pressure gauge

Igniters are made from silicon ________ or silicon carbide.

• carbon

• nitride

• glass

• ceramic

Flame sensor current is quantified in Micro ____________.

• volts

• millivolts

• amps

• electrons

A limit switch is an overtemperature device use to prevent overheating of an appliance such as a furnace. Limit switches are in the normally ___________ position.

• open

• over

• closed

• under

A rollout switch is ____________ resettable.

• manually

• automatically

• openly

• always

A fan switch is in the normally __________ position.

• open

• closed

• over

• under

An air temperature rise is the temperature difference between the return and heated ___________ air.

• cold

• warm

• hot

• supply

Which tool would you not use when checking gas pressure on a furnace?

• Gas pressure gauge

• Compound Gauge

• Slack tube manometer

• Dual port manometer