According to the International Mechanical Code, a Type I grease hood has a horizontal change in direction of 60°. What is the required minimum distance of a clean out opening from this change in duct direction?
10 feet
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| Term | Definition |
|---|---|
| According to the International Mechanical Code, a Type I grease hood has a horizontal change in direction of 60°. What is the required minimum distance of a clean out opening from this change in duct direction? | 10 feet |
| According to the uniform, mechanical code, what is the ratio of cubic feet to BTUs that define a confined space? | 50 ft.³ per 1000 BTUs |
| Starting relays are used in hermetic compressor motors to drop out of the circuit? | Start windings |
| What condition prohibits the use of single-wall vent piping for a residential gas furnace? | When the vent runs through the interior concealed spaces |
| Using the ADI duct size calculator at 1300 CFM, and the design friction loss 0.8, what would be the minimum size metal duct required? | 10 inch |
| When brazing a site glass in the liquid line, at what minimum temperature can the chemical in the site glass be adversely affected? | 275° |
| According to the Uniform Mechanical Code, what is required for securing joints between sections of connector piping and connections to flue collars or draft hood outlets? | Sheet metal screws |
| What determines air pressure at the earths surface? | Weight of the air above the Earth |
| What type of device senses an off-line condition and shuts down the offending piece of equipment in order to prevent a hazardous condition? | Interlock |
| How soon after a fatal incident must the death be reported to OSHA? | Eight hours |
| a portable refrigerator. Container shall not be connected to any refrigerator system longer than | Necessary to charge or discharge the system |
| What is the applied voltage across an electric heater with a total current draw of 22 AMPS and a resistance of 11 OHMS? | 242 |
| When sizing the section line, what is the maximum saturation temperature drop of the refrigerant? | 2° F |
| A hot water boiler adjustment is important to avoid injury or scalding. A typical setting for the boiler heater would be between the temperature range of | 140 - 160°F |
| a compressor with the displacement of 10 in.³ actually pumps 6 in.³. What is its volumetric efficiency | 60% |
| At what condition will moisture in the air begin to condense? | Dewpoint |
| Per the IFGC, exhaust ducts shall have a smooth interior finish, and the exhaust duct size shall be ____ nominal in diameter | 4 inches |
| The UMC defines ____ as an organization, primarily established for purposes of testing to approved standards and approved by the Authority Having Jurisdiction | Approved testing agency |
| Sub cooling temperature is the difference between the saturated liquid temperature and the liquid line temperature. Given the following conditions, what is the calculated subcooling temperature? - Saturated Liquid Temp 127°F - liquid line temp 113°F - Outdoor wet bulb temp 94°F | 32°F |
| Combustion air openings for fuel, gas equipment, located and confined spaces that connect with addicts or directly communicate with outdoors may have one opening with one square inch per? | 3000 BTU per hour of the input rating of all appliances in the space |
| Insulation applied to the exterior surface of ducts located inside a building, other than dwellings or apartments, shall have a flame spread rating of not more than | 25 |
| What is a possible result of insufficient combustion air? | burner flames with yellow tips |
| An agreement to perform work, made either verbally or in writing, either personally or by having an employee perform the work is a | Contract |
| The IMC specifies that combustion air ducts, whether for direct or vertical openings, must have a minimum cross sectional dimension of ____? This ensures adequate airflow for combustion and dilution air to fuel burning appliances. | 3 inches |
| According to the uniform, mechanical code, what is the clearance from combustible material for a type B residential boilers and furnaces with listed gas conversion burner with draft hood connector? | 6 inches |
| Per the MR & AC an ____ is a heat exchanging device that absorbs heat into its refrigerant | Evaporator |
| Occupants of space shall feel attractive air is moving at velocities more than how many feet per minute | 25 to 30 |
| Low temperature, silver alloy, brazing metals have a flow point of | Starts melting at 1120°F and flows at 1145°F |
| The thermal conductivity (k) of a material is a measure of | How quickly heat can travel through it |
| Unless the venting system is an integral part of a listed appliance, in no case shall the area of an venting system be less than | 3 inches in diameter |
| a floor above a crawlspace that is composed of rough pine flooring, wood lath, and plaster ceiling with a total R value of 3.57 will have a U-value of | 0.0280 |
| Welded fittings used in steam piping systems must be | Black steel |
| Per the MR&AC the absolute pressure is gauge pressure plus atmospheric pressure therefore, what would be the calculated value of the absolute pressure when the pressure gauge reading is 60 psi | 75 PSIA |
| Piping shall be supported at distances, not exceeding the spacing specified in the IMC So the maximum horizontal spacing shall be less than ____ for the PVC piping? | 4 feet |
| Which types of circulator pumps are typically used in hydronic systems? | Centrifugal Pumps |