Electrical Engineering Questions

"A fitting or device that provides a liquid seal to prevent the emission of sewer gases without materially affecting the flow of sewage or wastewater through the trap. A. VACUUM BREAKER B. YOKE VENT C. BACKFLOW PREVENTER D. TRAP!"

"The maximum slope of the vent section of the horizontal branch drain is one unit vertical in ________________. The entire length of the vent section of the horizontal branch drain shall be sized for the total drainage discharge to the branch. A. 12 units horizontal (8.3-percent slope) B. 6 units horizontal (16-percent slope) C. 10 units horizontal (6-percent slope) D. 20 units horizontal (12.3-percent slope)!"

"_________________ must be made after the roof, framing, fireblocking, firestopping, draftstopping and bracing is in place and all sanitary, storm and water distribution piping is roughed-in, and prior to the installation of wall or ceiling membranes. A. Underground inspection B. Rough-in inspection C. Final D. none of these!"

"The potable water supply to automatic fire sprinkler and standpipe systems must be protected against backflow by a ____________________. Exceptions ignored. A. air gap or barometric vacuum breaker B. check-valve assembly C. double check-valve assembly and a reduced pressure principle backflow preventer D. double check-valve assembly or a reduced pressure principle backflow preventer!"

"Water closets having a concealed trap seal or an unventilated space or having walls that are not thoroughly washed at each discharge are _____________________ . A. installed in accordance with manufacturers instructions B. prohibited C. inspected annually D. none of these!"

"Cleanouts must be installed at each change of direction greater than __________ in the building sewer, building drain and horizontal waste or soil lines. Where more than one change of direction occurs in a run of piping, only one cleanout shall be required for each 40 feet (12 192 mm) of developed length of the drainage piping. A. 30 degrees (0.52 rad) B. 45 degrees (0.70 rad) C. 45 degrees (0.79 rad) D. 60 degrees (1.05 rad)!"

"Piping installed underground beneath buildings is prohibited except where the piping is encased in _________________________________ designed to withstand the superimposed loads. A. a conduit of wrought iron, plastic pipe, or steel pipe or other approved conduit material B. reinforced concrete C. concrete pipe D. any of the above!"

"Openings and outlets equipped for hose connection must be protected by means other than ______________ . A. a backflow preventer B. a check valve C. an air gap D. none of these!"

"At the points of interconnection between the hot and cold water supply piping systems and the individual fixtures, appliances or devices, provisions must be made to __________________ such piping systems. A. prevent flow between B. to mix and balance C. pressure balance D. any of these!"

"What is the maximum flow rate allowed for a water closet? A. 1.0 gallons per flushing cycle B. 1.6 gallons per flushing cycle C. 2.0 gallons per flushing cycle D. 2.5 gallons per flushing cycle!"

"Standpipes must be individually trapped. Standpipes shall extend a minimum of __________ and a maximum of __________ above the trap weir. Access shall be provided to all standpipes and drains for rodding. A. 18 inches (457 mm), 42 inches (1066 mm) B. 12 inches (304 mm), 36 inches (912 mm) C. 20 inches (508 mm), 30 inches (762 mm) D. 18 inches (457 mm), 36 inches (912 mm)!"

"The maximum allowable vertical hanger spacing midstory guide for sizes 2 inches and smaller for stainless steel drainage systems is __________ feet. A. 2 B. 4 C. 10 D. 15!"

" Sheet copper for general plumbing applications shall not weigh less than ____________________. A. 8 ounces per square foot (2.7 kg/m2). B. 4 ounces per square foot (1.6kg/m2). C. 12 ounces per square foot (3.7 kg/m2). D. none of these!"

"The maximum capacity of a water supply line to a water supply tank 780 gpm. What is the should the diameter size in inches for an acceptable overflow pipe? A. 4 B. 5 C. 6 D. 8 E. none of these!"

" In each bathroom or toilet room, urinals must not be substituted for more than ___________ percent of the required water closets in assembly and educational occupancies. Urinals shall not be substituted for more than ___________ percent of the required water closets in all other occupancies. A. 50, 67 B. 67, 50 C. 75, 25 D. 25, 75!"

" The horizontal combination drain and vent pipe must have a maximum slope of one-half unit vertical in ____ units horizontal (4-percent slope). A. 3 B. 6 C. 9 D. 12!"

" Shower and tub-shower combination valves must be equipped with a means to limit the maximum setting of the valve to 120°F (49°C), which shall be field adjusted in accordance with the manufacturer's instructions. _______________________ can not be utilized to comply with this section of the code. A. pressure balancing valves B. combination balanced-pressure/thermostatic valves C. In-line thermostatic valves D. any of these!"

"The minimum required diameter of stack vents and vent stacks of a system with a developed length of 300 feet and total of 42 drainage fixture units connected thereto, is ____________ inch.A. 1.25 B. 2 C. 2.5 D. 3!"

"All hospitals must have _______________ installed in such a manner so as to minimize the potential for an interruption of the supply of water in the event of a water main or water service pipe failure. A. an emergency private well or storage tank B. oversized water service entrance piping C. two water service pipes D. any of these!"

"Water heaters operating above atmospheric pressure provided with a self-closing (levered) pressure relief valve and temperature relief valve or combination thereof. This safety relief valve must be located in the top ___________ of the tank served. A. 6 inches (152 mm) B. 12 inches (304 mm) C. 18 inches (457 mm) D. 24 inches (610 mm)!"