Two technicians are discussing dual-stage airbags. Technician A says that a deployed airbag is safe to handle regardless of which stage caused the deployment of the airbag. Technician B says that both stages ignite, but at different speeds depending on the speed of the vehicle. Who is right?

The condensate drain on a rooftop unit

A) Does not require any type of drain line B) must include a trap unless the unit has an integral trap C) Is normally run through the curb to an inside drain connection D) Does not require a trap because of the short distance

Fenestration in general, and windows in particular, affect efficiency and comfort through four specific principles: radiation, convection, conduction, and ____.

A. air leakage B. conversion C. reduction D. reflection

An installer can work 6 1/2 hours each day at a worksite.  The installer will need 42 1/4 hours to do a complete installation of a heating and cooling system.  How many days will the installer be at the job site?

Fill in the blank(s) with the appropriate word(s).

How can a hot water boiler heat water to 250°F and not boil the water?

A) Water treatment is added whose primary purpose is to raise the boiling point of the water. B) Hot water boilers cannot maintain 250°F water without boiling the water. C) The water does boil, but the steam is vented to the air. D) The system is under enough pressure to raise the boiling point above the water temperature in the boiler.