Session 13. Flashcards
0
Q
- You’re a general contractor and you estimate a job on the of material for $1,000 with discounts of - 10%, - 10% +5%. You subcontract the work out.
The total cost of labor on 60 man hours at $7.24 per hour +25% for your labor.
You must pay a subcontractor 10% of the cost.
You must allow yourself a 15% profit as the general contractor.
Cost of material -
Cost of labor -
Subcontractor cost -
Total profit for general contractor -
A
Cost of material - 1,000.00x0.9x0.9x1.05=850.00
Cost of labor - 7.24x1.25=543.00
Subcontractor cost - 543.00x1.1=1,532.85.
Total profit for general contractor -1,532.85x0.15=229.93.
1
Q
- Aflushometer when installed will use less water:
A. Tham a low down tank.
B. If properly adjusted and depending on size installed.
C. When not properly adjusted.
D. When not adjusted.
A
B. If properly adjusted and depending on size installed.
2
Q
3. The type of pipe that can be used on oxygen and nitrous oxide systems is: A. Wrought iron. B. Cast iron. C. Copper tubing. D. Black steel pipe (threaded).
A
C. Copper tubing.
3
Q
- The minimum test pressure for gas piping shall be most nearly:
A. 6” water column.
B. 4 psi.
C. 10 psi.
D. 50% greater than proposed operating pressure.
A
B. 4 psi.
4
Q
5. Escutcheons shall be used for the purpose of: A. Contraction. B. Pipe rest. C. Rat proofing. D. Roach proofing.
A
C. Rat proofing.
5
Q
6. All hospitals shall have: A. Circuit venting. B. Loop venting. C. At least one water service. D. At least two water service.
A
D. At least two water service.
6
Q
7. Septic tank shall be located a minimum distance from a water service of: A. 2 feet. B. 5 feet. C. 10 feet. D. 15 feet.
A
C. 10 feet.
7
Q
8. Before inspection stars, a 10 foot head of water on plumbing drainage system shall hold for: A. 10 minutes. B. 15 minutes. C. 20 minutes. D. 25 minutes.
A
B. 15 minutes.
8
Q
9. In general the gas pressure in a domestic gas line after it leaves the gas meter is usually: A. 12" water column. B. 8" water column. C. 4" water column. D. 6" water column.
A
C. 4” water column.
9
Q
10. When brazed joints are made, heat shall be applied to the metal in order that the solder can flow into the space by: A.Vacuum. B. Liquification. C. Oscillation. D. Capillary attraction.
A
D. Capillary attraction.
10
Q
11. Wiping solder for lead pipes usually has a melting range of most nearly: A. 150 to 250 deg. F. B. 251 to 350 deg. F. C. 360 to 470 deg. F. D. 475 to 600 deg. F.
A
C. 360 to 470 deg. F.
11
Q
- The main objection to the installation of non-siphon trap is:
A. Easily affected by back pressures.
B. More expensive than a regular trap.
C. Not provided with an adequate water seal.
D. Non self-cleaning.
A
D. Non self-cleaning.
12
Q
- A lavatory is carelessly installed in that its waste is double trapped before it is connected to the branch waste. In operation the probability is that:
A. Both traps would lose their seal.
B. Only the lower trap would lose its seal.
C. Only the upper trap would lose its seal.
D. The fixture waste may become air bound.
A
D. The fixture waste may become air bound.
13
Q
- When the existing adjoining building is higher than the new building, all new vent terminals of the new building shall be located:
A. At least 3 feet above the nearest wall opening of the existing building.
B. At least ten feet from the common lot line.
C. Above the existing building roof line.
D. At least 7 feet above the new building roof level.
A
B. At least ten feet from the common lot line.
14
Q
15.?When applying a test to gas piping under 1/2 psi, after all piping is installed and all outlets capped, the plumber shall apply an air pressure test equal to:
A. A column of water at least 6” in height, for a minimum of thirty minutes.
B. Air pressure at 3 psi, for a minimum of thirty minutes.
C. Above the existing building roof level.
D. At least 7 feet above the new building roof level.
A
B. Air pressure at 3 psi, for a minimum of thirty minutes.
15
Q
16. A sanitary and storm water drainage systems to be water tested in sections. When testing the uppermost section the upper footage of the next lower section which is to be re-tested is: A. 10 feet. B. 8 feet. C. 6 feet. D. 4 feet.
A
A. 10 feet.
16
Q
17. Application for plumbing permits shall set forth the name and business address of the licensed plumber and evidenced of compliance with the provisions of the: A. Building code. B. State Workmen's Compensation Low. C. Social security law. D. City income tax law.
A
B. State Workmen’s Compensation Low.
17
Q
- A sewage ejector pot and pump shall be installed when any part of the sanitary drainage system is most nearly:
A. Between the crown and centerline of the street sewer.
B. Below the crown of the street sewer.
C. Below the invert of the street sewer.
D. Below the centerline of the street sewer.
A
B. Below the crown of the street sewer.
18
Q
19. The minimum depth below exterior grade that a water service pipe shall be installed is at least: A. 2 feet. B. 3 feet. C. 3-1/2 feet. D. 6 feet.
A
C. 3-1/2 feet.
19
Q
- As a contracting master plumber you have improperly followed the department of buildings procedure and have made an appointment for a test of gas piping. Upon (residential apartment house) the inspectors arrival on the job site he find all piping installed (exposed), connections properly made to the gas ranges, an approved pressure imposing device and analog gauge. The inspector should:
A. Go ahead with the air pressure test and make sure that a pressure equal to a column of mercury 6’’’ is held for 10 minutes.
B. Go ahead with an air pressure test and make sure that a pressure equal to 3 psig for a minimum f 30 minutes.
C. Go ahead with an air pressure test and make sure that a pressure equal to 50 psig for a minimum of 30 minutes.
D. Advise the contracting master plumber that he has not complied with the conditions of the international fuel gas Code of 2003 :test of gas piping” and suggest that he make the necessary changes before requesting another test.
A
D. Advise the contracting master plumber that he has not complied with the conditions of the international fuel gas Code of 2003 :test of gas piping” and suggest that he make the necessary changes before requesting another test.
20
Q
- A pressure relief valve should be placed on:
A. The highest point of the line.
B. Hot water line leaving the hot water tank.
C. Cold water line entering the hot water tank.
D. The top of the hot water tank.
A
D. The top of the hot water tank.
21
Q
- The type of water closet that cannot be installed under any condition is:
A. Blow out type.
B. Wash-down bowl type.
C. Water closets having a concealed trap seal.
D. A siphon jet water closet.
A
C. Water closets having a concealed trap seal.
22
Q
23. Linings of flush tanks constructed of wood shall be: A. Cement lined. B. 12 oz. copper. C. Lead. D. 10 oz. copper.
A
D. 10 oz. copper.
23
Q
24. The proper flux to use for tinning a brass ferrule is: A. Rosin. B. Killed acid. C. Tallow. D. Soldering paste.
A
A. Rosin.
24
Q
25. Chipping knives are used for: A. Cutting sheet metal. B. Cutting sheet lead. C. Cutting lead waste pipe. D. Cutting uneven edges of wiped joints.
A
B. Cutting sheet lead.
25
Q
26. Which one should be installed on the supply to showers: A. Back water valve. B. Flap valve. C. Safety valve. D. Thermostatic mixing valve.
A
D. Thermostatic mixing valve.
26
Q
27. A public sanitary or combined sewer shall be deemed available to a one- and two-family dwelling if a property line of such dwelling is within: A. 50 feet. B. 100 feet. C. 250 feet. D. 500 feet.
A
B. 100 feet.
27
Q
28. Vitrified clay pipe may be used for: A. House drains. B. Leaching cesspools. C. House sewers, residential or commercial. D. Not permitted.
A
C. House sewers, residential or commercial.
28
Q
- The controlling valve of the water supply to a building shall be:
A. Globe valve, 150 psi.
B. Gate valves of any size, especially over 2-inch.
C. Full port ball valves over 2-inch.
D. Valve with a by-pass.
A
B. Gate valves of any size, especially over 2-inch.
29
Q
30. Match the term on the right with the appropriate term on the left:
A. Caliber - 1. Base of stack.
B. C.O. - 2. Y outlet.
C. Pitch - 3. Hanger.
D. Spur - 4. Bore.
E. Mercury - 5. Air test.
6. Grade.
7. Water seal.
8. Roof drain.
A
A. Caliber - 4. Bore. B. C.O. - 1. Base of stack. C. Pitch - 6. Grade. D. Spur - 2. Y outlet. E. Mercury - 5. Air test.
30
Q
- One of the following gas distribution systems which is in accordance with the code is:
A. A five inch gas distribution piping with screw fittings.
B. Butt welded gas distribution piping designed to operate at 3.5 psig.
C. 3 inch gas distribution piping system which also serves as an electrical ground for a domestic heating system motor.
D. 2” gas distribution piping installed 15 feet below grade.
A
B. Butt welded gas distribution piping designed to operate at 3.5 psig.
31
Q
- Where city water is used as an auxiliary supply to a roof or suction tank fed by wells or salt water the one which is not correct is:
A. The tank must be an open one.
B. The city water supply must be controlled by a ball cock.
C. The tank must be made of wood.
D. The ball cock shall discharge at least 4 inches above the top of thew overflow.
A
C. The tank must be made of wood.
32
Q
33. When slight changes in direction are to be made in plumbing system, the best type of fittings to use are: A. Silver solder. B. Bell and spigot. C. Flanged. D. Screwed.
A
B. Bell and spigot.
33
Q
34. In accordance with DEdP water rule 20-3- (s), each new or repaired service pipe shall be subjected to a water test, when the greatest street pressure is 52 psi, the water service piping shall be undergo a pressure of: A. 104 psi. B. 52 psi. C. 65 psi. D. 78 psi.
A
B. 52 psi.
34
Q
35. A pump cost $600.00 after being discounted at 15%, 12% and 8%. The list price of the pump was most nearly: A. $413.00 B. $835.00 C. $923.00 D. $875.00
A
D. $875.00
600/0.85/0.88/ 0.92=$875.00
35
Q
36. The type of water meter to be installed when there are wide pressure fluctuations: A. Displacement. B. Turbine . C. Compound. D. Single jet.
A
C. Compound.
36
Q
37. A pump has a capacity of 750 GPM. The highest point from the centerline of the pump discharge to the highest fixture is 30 feet, there is an equivalent of 60 ft. loss of head due to pipe friction. The manufacturer states the pump is 83% efficient. The pump brake horsepower is most nearly required is: A. 5 H.P. B. 10 H.P. C. 15 H.P. D. 20 H.P.
A
D. 20 H.P.
37
Q
38. The minimum spacing interval between 1-1/2 inch corporation stops shall be: A. 6 inches. B. 12 inches. C. 18 inches. D. 24 inches.
A
D. 24 inches.
38
Q
- When a pump is directly connected to the street main, there a low-pressure cutoff shall (emergency shutoff) be installed on all booster pumps in a water pressure booster system, to prevent creation of a vacuum or negative pressure on the suction side of the pumps when a positive pressure of:
A. 10 psi or less occurs on the suction side of the pump.
B. 7 psi or less occurs on the suction side of the pump.
C. 5 psi or less occurs on the suction side of the pump.
D. 3 psi or less occurs on the suction side of the pump.
A
A. 10 psi or less occurs on the suction side of the pump.
39
Q
40. A toilet tank that is 18 inches long, 5 inches wide and 14 inches high contains most nearly: A. 4-1/2 gallons. B. 5-1/2 gallons. C. 6-1/4 gallons. D. 7-1/4 gallons.
A
B. 5-1/2 gallons.
40
Q
41. When color coding piping for medical gases are used, the marking color for nitrous oxide is: A. Yellow with black letters. B. Blue with white letters. C. B.ack with white letters. D. Green with white letters.
A
B. Blue with white letters.
41
Q
42. When color coding piping for medical gases are used, the marking color for oxygen is: A. Yellow with black letters. B. Blue with white letters. C. B.ack with white letters. D. Green with white letters.
A
D. Green with white letters.
42
Q
43. When color coding piping for medical gases are used, the marking color for nitrogen is: A. Yellow with black letters. B. Blue with white letters. C. B.ack with white letters. D. Green with white letters.
A
C. Black with white letters.
43
Q
44. When color coding piping for medical gases are used, the marking color for medical air is: A. Yellow with black letters. B. Blue with white letters. C. B.ack with white letters. D. Green with white letters.
A
C. B.ack with white letters.
44
Q
45. When color coding piping for medical gases are used, the marking color for vacuum is: A. Black with white letters. B. Green with white letters. C. Blue with white letters. D. White with black letters.
A
D. White with black letters.
45
Q
46. Content for all medical gas cylinders shall be identified by: A. Color. B. Letters stamped into the cylinder. C. Blue with white letters. D. Size.
A
A. Color.
46
Q
47. After the plumbing fixtures have been set and their traps filled with water, the entire drainage system shall be verified as to materials and shall be tested and proven gas tight by a: A. Smoke test. B. Gas test. C. Peppermint test. C A & B.
A
A. Smoke test.
47
Q
48. When testing a building house sewer (gravity sewer test) it shall be tested by inserting a test plug at the point of connection with the street sewer before such connections is made. The building house sewer shall then be filled with water under a head of at least: A. 10 feet and hold for 15 minutes. B. 15 feet and hold for 15 minutes. C. 20 feet and hold for 15 minutes. D. 25 feet and hold for 15 minutes.
A
A. 10 feet and hold for 15 minutes.
48
Q
- An air test for drainage and venting shall be made by forcing air into the:
A. System until there is a uniform gauge pressure of 5 psi for 15 minutes.
B. System until there is a uniform gauge pressure of 5 psi for 10 minutes.
C. System until there is a uniform gauge pressure of 10 psi for 15 minutes.
D. System until there is a uniform gauge pressure of 10 psi for 10 minutes.
A
A. System until there is a uniform gauge pressure of 5 psi for 15 minutes.
49
Q
50. A water test shall be applied to all drainage and vent systems in its entirety or in section after rough piping has been installed. If applied to the entire system, all openings in the piping system, except the highest opening, shall be tightly closed and the system filled to the point of overflow.If the system is tested in sections, each opening, except the highest opening of the section under test, shall be tightly plugged and each section filled with water. No section shall be tested with less than a: A. 5 foot of water. B. 15 foot of water. C. 10 foot of water. D. 20 foot of water.
A
C. 10 foot of water.
50
Q
51. Compute the area in figure 37. A. 10,000 sq ft. B. 12,204 sq.ft. C. 12,325 sq.ft. D. 12,500 sq.ft.
A
B. 12,204 sq.ft. 48'+54"+48"=150' 150x90=13,500 sq, ft,' 24x54=1296 sq,ft, 13,500-1,296=12,204 sq.ft.
51
Q
52. Brazing alloys composition using BCuP for medical gases are required. What is Cu a standard for: A. Brazing. B. Copper. C. Phosphorous. D. Silver.
A
B. Copper.
52
Q
53. Brazing alloys composition using BCuP for medical gases are required, what is P a standard for: A. Brazing. B. Copper. C. Phosphorus. D. Silver.
A
C. Phosphorus.
53
Q
54. Brazing alloys composition using BAG for medical gases are required, what is AG a standard for: A. Brazing. B. Copper. C. Phosphorus. D. Silver.
A
D. Silver.
54
Q
- Which fixture has the most fixture unit value:
A. Water closet, flushometer tank, public or private.
B. Water closet, private (1.6 gpm).
C. Water closet, private (flushing greater 1.6 gpf).
D. Water closet, public (flushing greater than 1 gpf).
A
D. Water closet, public (flushing greater than 1 gpf).
55
Q
56. There is a 7000 gallon roof tank installed for domestic water, supplied by a 200 gpm pump.The tank discharges to one half its capacity before the pump starts. It starts off at full capacity. The water use of the building is 100 gpm. In a day. the pump will run most nearly: A. 8 hrs. 25 min. B. 12 hrs. C. 10 hrs. 33 min. D. 6 hrs.55min.
A
B. 12 hrs.
100 gpm x 60 min. x 24 hrs=144,000 gal/per /day
144,000/200 gal/per/min = 720 min
720/60 min=12 hrs.
56
Q
7. On a pumping unit, the total static and pressure losses due to friction are equal to 105 psi.Two hundred gallons per minute of water are pumped during peak load period of the day.What horse power is required to be produced by the pumping unit which draws water from a surge tank at the same level as the pump, most nearly: A. 5 H.P.. B. 8.5 H.P. C. 12.13 H.P. D. 15.25 H.P.
A
C. 12.13 H.P.
2,31’x105psi=242.5 total head in feet.
H.P.= G.P.M.xTotal head in feet/4000 = 200x242.55/4000=12.13 H.P.
57
Q
58. When more than one building house drain discharges into a private sewer within the property line, the sewer must be designed on a design basis and the slope of the sewer shall be predicated on the size selected, but in no case shall the slope be less than that required to produce a velocity in the sewer of less then: A. 2 fps. B. 3 fps. C. 4 fps. D. 5 fps.
A
B. 3 fps.
58
Q
- A heel or side inlet quarter bend when used as a vent connection in a horizontal position is:
A. Permitted.
B. Okay if elevated to a 22-1/2” off the horizontal plane.
C. Prohibited.
D. Permitted with the approval from the inspector.
A
C. Prohibited.
59
Q
- A rectangular tank 7’x4’x3’ and a cylindrical tank 4’x7’. Which tank has the greater volume:
A. The cylinder is greater by 4 cu. ft.
B. The cylinder is greater by 8 cu. ft.
C. The rectangular tank is greater by 5 cu. ft.
D. The rectangular tank by 1 cu. ft.
A
A. The cylinder is greater by 4 cu. ft
Vc=0.7854xDxDXL=0.7854x4x4x7=87.96 cu.ft.
Vr=7x4x3=84 cu. ft.
88-84=4 cu ft.
