Test 3

Question 1

1. Any part of the piping system that extends to fixtures on two or less consecutive floors except a riser, main or stack:

A. Branch.
B. Crotens.
C. Riser.
D. Stack.

Answer 1

A. Branch.

Question 2

2. A distance along a soil waste stack corresponding in general to a story height, but not less than 8 feet, within which the horizontal branches from one floor or story of a structure are connected to the stack:

A. Branch bent.
B. Building pipe.
C. Branch interval.
D. Building drain.

Answer 2

C. Branch interval.

Question 3

3. A vent connecting one or more individual vent with a vent stack or stack:

A. Branch interval.
B. Branch vent.
C. Building branch.
D. Building branch drain.

Answer 3

B. Branch vent.

Question 4

4. That part of the lowest piping of the drainage system that receives the discharge from soil, waste and other drainage pipe inside and that extends 5 feet in developed length of pipe beyond the exterior walls of the building and conveys the drainage to the building sewer:

A. Branch drain.
B. Building drain.
C. Branch interval.
D. Building sewer.

Answer 4

B. Building drain.

Question 5

5. A building drain that conveys both sewage and storm water or other drainage:

A. Combined building drain.
B. Combined sanitary drain.
C. Sanitary street sewer.
D. Combined street sewer.

Answer 5

A. Combined building drain.

Question 6

6. An access opening in the drainage system utilized for the removal of obstructions:

A. Plug
B. Trap.
C. Fixture trap.
D. Clean-out.

Answer 6

D. Clean-out.

Question 7

7. A vent connection at the junction of two fixture drains or to a fixture branch and serving as a vent for both fixtures:

A. Common vent.
B. Unit vent.
C. Dual vent.
D. A, B, & C.

Answer 7

D. A, B, & C.

Question 8

8. A pipe inside the building that conveys storm water from the roof to a storm or combined building drain:

A. Leader.
B. Conductor.
C. Water pipe.
D. Drainage pipe.

Answer 8

B. Conductor.

Question 9

9. The smallest size soil branch permitted is:
10. 1-1/2 inch
11. 2 inch
12. 3 inch
13. 4 inch.

Answer 9

3. 3 inch

Question 10

10. The plumbing code permits slip joints

A. on the outlet side of the fixture trap
B. on the inlet side of the fixture trap
C. only with expansion joints
D. only on roof terminals over 5’.

Answer 10

A. on the outlet side of the fixture trap

B. on the inlet side of the fixture trap

Question 11

11. Of the following traps. the type that is not permitted to be installed is

A. 1/2-S
B. P
C. 3/4-S
D. running.

Answer 11

C. 3/4-S

Question 12

12. The maximum distance between clean-outs in horizontal drainage lines shall be

A. 25 feet
B. 35 feet.
C. 100 feet.
D. 75 feet.

Answer 12

C. 100 feet.

Question 13

13. When referring to a building drainage system, the term “waste pipe” should normally be applied to

A. piping which drains water closets
B. piping which does not receive human waste
C. any pipe which carries water-borne wastes
D. any pi[e which connects to the building drain.

Answer 13

B. piping which does not receive human waste

Question 14

14. A trap should be vented so that the seal at no time is subjected to a pressure differential of more than

A. 1 inch of water
B. 2 inches of water.
C. .1 pounds per square inch
D. .2 pounds per square inch.

Answer 14

A. 1 inch of water

Question 15

15. The minimum required diameter of any soil stack extension which passes through the roof is

A. 3 inches
B. 4 inches
C. 5 inches
D. 6 inches.

Answer 15

B. 4 inches

Question 16

16. A device used to prevent back flow by siphonic action is called a

A. relief valve
B. sewage ejector
C. foot valve
D. vacuum breaker.

Answer 16

D. vacuum breaker.

Question 17

17. The minimum pressure available at the faucet or water outlet with the water outlet wide open shall be

A. 2 psi
B. 4 psi
C. 6 psi
D. 8 psi.

Answer 17

D. 8 psi.

Question 18

18. Air chambers installed at individual fixtures

A. need not be accessible
B. shall be accessible
C. are required for loads of less than 5 fixture units
D. are required for loads of more than5 fixture units.

Answer 18

B. shall be accessible

Question 19

19. Each fixture trap shall have a liquid seal of at least

A. 2”
B. 2-1/2”
C. 3”
D. 4”.

Answer 19

A. 2”

Question 20

20. Each fixture trap shall have a protecting vent so located that the developed length of the fixture drain from the trap weir to the vent fitting is not more than

A. 6 inches
B. 12 inches
C. 18 inches
D. 48 inches.

Answer 20

D. 48 inches.

Question 21

21. The area of a circle having a diameter of one inch is .7854 square inches. The area of a circle with a two inch diameter would be

A. 1.5708 square inches
B. 2.3562 square inches
C. 3.1416 square inches
D. 15.708 square inches.

Answer 21

C. 3.1416 square inches

Question 22

22. If a plumber, using 2 45 degree elbow, determined that the “travel peace” was 17 inches, the offset was most nearly

A. 10 inches
B. 12 inches
C. 14 inches
D. 17 inches.

Answer 22

B. 12 inches.

.707x17 = 12.019”.

Question 23

23. If a pipe with an outside diameter of 7” is to be fastened against the ceiling with a U-strep. the distance from the ceiling around the pipe and back to the ceiling should be approximately

A. 14 inches
B. 16 inches
C. 18 inches
D. 20 inches.

Answer 23

C. 18 inches.

C/2 + 2 x D /2 = 3.14 x D / 2 + D = 3.14 x 7/2 + D=18”.

Question 24

24. A piece of pipe that is 37.875”E-E is equal to

A. 3’-0 5/8”
B. 3’-0 7/8”
C. 3”-1 5/8”
D. 3’-1 7/8”.

Answer 24

D. 3’-1 7/8”.

37.875”=36”+1”+.875x8/8”=3x12”+1-7/8”=3’-1 7/8”.

Question 25

25. If a plumber scaled a blueprint drawing 1/4"=1'-0" and found that the line measured 9 3/4". the length of the line represented is A. 31 1/2 feet B. 36 feet C. 39 feet D. 42 1/2 feet.

Answer 25

C. 39 feet 9 3/4 X 4 = 39'

Question 26

26. A fitting having a 1/16th bend has an angle of most nearly A. 5 5/8* B. 11 1/4* C. 22 1/2* D. 30*.

Answer 26

C. 22 1/2*

Question 27

27. A tee reads 3"x3"x5" is called an A. reducing tee B. increasing tee C. large run tee D. bull head tee.

Answer 27

D. bull head tee.

Question 28

28. Pipe joint cement should be applied on A. the threads of female fittings only B. the threads of male fittings only C. the threads of both male and female fittings D. either male or female threads , depending on the type of fitting.

Answer 28

B. the threads of male fittings only

Question 29

29. Galvanized steel pipe may not serve as a A. house drain B. soil stack C. house sewer D. vent pipe.

Answer 29

C. house sewer

Question 30

30. Good practice requires that the end of a pipe to be installed in a plumbing system be reamed to remove the inside burr after it has been cut to length. the purpose of this reaming is to A. restore the original inside diameter of the pipe at the end B. remove loose rust C. make threading of the pipe easier D. finish the pipe accurately to length.

Answer 30

A. restore the original inside diameter of the pipe at the end

Question 31

31. A three inch (3") standard weight pipe, and a three inch (3") extra strong pipe, have the same A. outside diameter B, inside diameter C. weight per foot of pipe D. frictional loss per hundred feet of pipe for equal water flow.

Answer 31

A. outside diameter

Question 32

32. The tool that hold the dies when threading pipe, is generally called a A. yoke B. vise C. stock D. swedge.

Answer 32

C. stock

Question 33

33. In addition to acting as a filler between threads, pipe joint compound also acts as a A. permanent bond B. hardener C. coolant D. lubricant.

Answer 33

D. lubricant.

Question 34

34. A return bend in a pipe line changes the direction of flow by A. 45* B. 90* C. 135* D. 180*.

Answer 34

D. 180*.

Question 35

35. A pipe reducing coupling normally has A. two female threads B. two male threads C. one continuous female thread D. one male and one female thread.

Answer 35

A. two female threads

Question 36

36. A Kennedy or Tucker fitting is generally installed on A. water lines B. gas lines C. vent lines D. circulating lines.

Answer 36

C. vent lines

Question 37

37. Fitting that is galvanized are coated with a layer of A. tin B. lead C. zinc D. copper.

Answer 37

C. zinc

Question 38

38. The house control valve located on the water service shall be the type designated as a A. globe valve B. gate valve C. check valve D. needle valve.

Answer 38

B. gate valve

Question 39

39. The piping of a newly installed drainage system shall be tested upon completion of the rough plumbing with a head of water of not less than A. 10 feet B. 15 feet C. 20 feet D. 25 feet.

Answer 39

A. 10 feet

Question 40

40. The term "percolation test" is associated with A. restaurant equipment B. coffee urns C. septic systems D. potable water analysis.

Answer 40

C. septic systems

Question 41

41. The fitting prohibited for use on drainage piping are A. double hubs B. short sweeps C. street elbows D. 4"x2" tapped tee wyes.

Answer 41

A. double hubs

Question 42

42. A 4" return bend with its unprotected open end a minimum of 6" above grade level would most likely be used as a A. Siamese connection B. fresh air inlet C. vent pipe for gasoline storage D. gas dryer exhaust.

Answer 42

B. fresh air inlet

Question 43

43. Floor drains shall be of a size to efficiently serve the purpose for which they are intended, but the nominal diameter of the outlet pipe shall not be less than A. 1 1/2" B. 2" C. 3" D.4".

Answer 43

C. 3"

Question 44

44. For drainage pipes larger than 4" in diameter, the clean out should not be less than A. 4" B. 6" C. 8" D. 10".

Answer 44

A. 4"

Question 45

45. The discharge from an ejector shall be through a connection located A. on the house side of the building house trap B. ten pipe diameters up stream from the trap C. in a properly vented air tight pit D. on the street side of the building house trap.

Answer 45

D. on the street side of the building house trap.

Question 46

46. If a fresh air tee is properly connected to an 8" house drain, the minimum size for this F.A.I. should be A. 3" B. 4" C. 5" D. 8".

Answer 46

B. 4"

Question 47

47. The invert of a house drain is located A. top outside B. bottom inside C. true center D. bottom outside.

Answer 47

B. bottom inside

Question 48

48. The minimum diameter of water service pipe shall be A. 5/8" B. 3/4" C. 1" D. 1 1/4".

Answer 48

C. 1"

Question 49

49. Capillary action takes place in the joining of A. screw pipe joints. B. bell and spigot joints C. compression fittings D. copper tube sweat joints.

Answer 49

D. copper tube sweat joints.

Question 50

50. With the exception of commercial dishwashers or laundries, hot water may not be discharged into any parts of a drainage system at a temperature above A. 150* B. 160* C. 170* D. 180*.

Answer 50

A. 150*