Truss members shall not be cut, drilled, spliced or notched or altered without the written approval of a registered design professional.

Modern oil burners have a primary control that uses which of the following methods to prove burner ignition?

Offsets for type B and L vent greater than 45 degrees from vertical is considered horizontal

In the figure above, the indoor fan motor will operate immediately after which one of the following sequences occurs?

When pressure testing gas pipe, air is commonly used, but ____________ can also be used 

The thermostatic expansion valve is designed to maintain a constant __________ in the evaporator.

There is a minimum required volume of combustion air for fuel fired appliances. From Figure 304.5.2 on page 3-21 in the IFGC, how much combustion air is required for a 50,000 Btu/h draft appliance plus a 50,000 Btu/h fan assisted appliance in the same room with an ACH of 0.35?

Cutting holes in structural steel shall be

A light (luminaire) controlled by a switch located at the passageway opening and a receptacle outlet shall be provided at or near the appliance

Which of the following conditions will occur if the airflow is restricted on either the supply or return side of the blower?