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?

Unless an exception applies, appliances are not allowed in

Which of the following is NOT a safety device that manufacturers use to provide extra protection for the compressor on condensing units with complex control systems?

For each sentence, mark True or False. 1. Refraction is the change in direction of wave propagation due to a change in transmission medium. 2. The index of refraction compares how much a material bends light relative to air. 3. The iris in the eye acts as a diaphragm, expanding and contracting to control the amount of light entering the eye. 4. Ciliary muscles adjust the shape of the cornea to help focus light on the retina. 5. The retina converts light into electrical signals, similar to how a CCD in a digital camera works.

A technician is pulling a 500 micron vacuum on an air conditioner after a compressor replacement.  After blanking off the pump, the technician observes that the micron reading would rise slightly and then stop periodically.   Which of the following is the most likely problem with the system?

When gas pipe passes through an outside wall, it must be

When sizing gas pipe systems using the tables, you will chose the table based on