HVAC Contractor prep 2020 Test 2

The International Mechanical Code considers a "flammable Vapor" to be concentration of flammable constituents in the air which exceeds _____________ percent of its flammability limit. - correct answer-25% During installation or service of electrical controls, a digital multimeter set to voltage must be connected in what manner? - correct answer-In parallell Unvented fuel-burning room heaters are NOT permitted in a Group ___________ occupancy? - correct answer-A According to the Code, smoke detectors shall be installed in return air system with a design capacity of at least HOW MANY cubic feet per minute of air flow in the duct, plenum, filters, air connections, or decontamination equipment and appliances? - correct answer-2,000 CFM If a system is using 12" round steel duct, what would be the air velocity measurement expressed in feet per minute (fpm) given that the air traveling through the duct is a velocity of 600 CFM? - correct answer-763 fpm Given that an 80,000 Btu/h gas furnace will have the combustion air supplied from a mechanical air supply system outdoor source, the combustion air in shall be at least _________ Cubic Feet per Minute ventilation? - correct answer-28 cfpm Texas Department of License and Regulation requires that a contractor give company contact information update if there are any changes as soon as possible. This notification must be within how many days? - correct answer-30 days