Plumbing 301 Exam Questions with 100% Correct Answers

LP gases are derived from the refining processes for natural gas and crude oil. Correct Answer True The ideal combustion ratio for propane is 1 part propane to 10 parts air. Correct Answer False NFPA 58 dictates requirements for installations inside the building. Correct Answer False Which of the following is an advantage of using propane as a fuel source? Correct Answer Cost effective ease of conversion availability ALL OF THE ABOVE************ The optimum reading for carbon monoxide in the delivered air stream is __________ Correct Answer Zero Most propane systems operate at a pressure of 11 inches of w.c. Correct Answer True Pipe sizing for most residential and small commercial buildings using propane is done using which of the following methods? Correct Answer Longest run Which pipe sizing method allows for the use of smaller diameter fuel gas piping with higher pressure fuel gas distribution? Correct Answer Hybrid pressure According to the National Fuel gas code, when must fuel gas piping be tested? Correct Answer after installation before and after connecting appliances before operation Shutoff valves, regulators, controls are not subjected to pressure testing. Correct Answer True On a propane system, a pilot burner with a narrow, sharp flame has which of the following problems? Correct Answer Undersized orifice Which flame may be caused by too much draft at the pilot site? Correct Answer Waving blue flame Which flame is caused by a lack of air? Correct Answer lazy yellow flame Which flame appears blue with a small yellow tip? Correct Answer normal flame Why are propane tanks filled to 80 percent capacity instead of 100 percent capacity? Correct Answer allow room for the liquid to expand as its temperature increases Which term means the amount of heat that is released when a fuel is completely burned? Correct Answer heating value A __________ is an overhead view of a property, drawn to scale, showing the location of buildings, street, sidewalks, alleys and easements for utilities. Correct Answer Site plan _______________ is the measurement of the steepness, incline, or a grade of a straight line. Correct Answer slope If a pipeline with a slope of 2% is 618 feet long, what is the total fall? Correct Answer 12.36 feet A 1% slope is the equivalent of approximately how many inches per foot? Correct Answer 1/8 If a benchmark is located on one of the property corners, it is referred to as the Correct Answer point of beginning The additional crosshairs positioned a precise distance above and below the center horizontal crosshair on a transit telescope are called Correct Answer stadia lines Leveling screws are tightened before storing the builder's transit and level. Correct Answer False A builders transit is similar in construction to a builder's level, but has a telescope mounted on a horizontal pivot so that it can be rotated vertically to measure vertical angles. Correct Answer True Common drafting practice uses dashed lines for existing elevations and continuous lines for proposed elevations. Correct Answer False If the elevation of point A= 280.50 feet, the reading of level rod at A= 1.75 feet, and the reading of level rod at B= 0.75 feet, what is the elevation of point b? Correct Answer 281.50 feet If the elevation of point a= 750.50 feet, the reading of level rod at a=2.50 feet, level rod b= -2.75 feet, what is the elevation of point b? Correct Answer 755.75 feet The Height of the Instrument is the reading at telescope crosshair. Correct Answer True