Plumbing Inspection Section#3 Drain, Waste and Vent Plumbing Test#3

• Question 1

  1 out of 1 points

  	A French drain is
  	Selected Answer:   a gravel pit below grade Answers:   a gravel pit below grade a swale that directs water only on one side of the house a trough in the basement that leads to a floor drain a second sump pit that the first drains into a floor drain located in the garage

• Question 2

  1 out of 1 points

  	A waste plumbing pipe is considered vertical if it has
  	Selected Answer:   45°+ slope from horizontal Answers: 25°+ slope from horizontal 30°+ slope from horizontal 40°+ slope from horizontal   45°+ slope from horizontal Less than 10° off vertical

• Question 3

  1 out of 1 points

  	To meet the Standards we have to inspect
  	Selected Answer:   drainage sumps, sump pumps and related plumbing Answers: private waste disposal systems   drainage sumps, sump pumps and related plumbing clothes washing machine connections sewer piping below the floor sewer piping in the walls

• Question 4

  1 out of 1 points

  	A trap primer in a plumbing system is
  	Selected Answer:   a tube from a fixture that lets water flow to the floor drain Answers: the floor drain closest to the outside sewage system the floor drain that connects to a basement walkout drain a backflow valve for the floor drain   a tube from a fixture that lets water flow to the floor drain the cleanout to the floor drain

• Question 5

  1 out of 1 points

  	Double trapping is a problem because
  	Selected Answer:   the water velocity at the second trap is too low Answers: the water velocity is too great you need cleanouts on both traps   the water velocity at the second trap is too low the water velocity at the first trap is too high the second trap is prone to siphoning

• Question 6

  1 out of 1 points

  	Laundry tub pumps differ from sump pumps because laundry tub pumps
  	Selected Answer:   can have a manual start switch Answers: do not have a check valve   can have a manual start switch can handle solids like a sewage pump can only be submersible pumps only run on 240-Volts

• Question 7

  1 out of 1 points

  	One issue with plastic pipes in a waste plumbing system is
  	Selected Answer:   they are noisy Answers: they sag when draining hot water the pipe walls are thinner than copper pipe they will split along the top   they are noisy they cannot be used underground

• Question 8

  1 out of 1 points

  	Sewage ejector pumps are used
  	Selected Answer:   where waste cannot flow by gravity Answers: only with septic tank systems when there is no way to vent the system   where waste cannot flow by gravity where the main waste line is less than 3 inches in diameter when there is a combination sewer system

• Question 9

  1 out of 1 points

  	A foot vent in a waste plumbing system is
  	Selected Answer:   used to vent an island sink Answers: a special vent which runs under a basement floor   used to vent an island sink a vent pipe used in a combination with an automatic air vent for island sinks the name for the dirt pocket of a vent line the vent that terminates outside a basement wall

• Question 10

  1 out of 1 points

  	The slope of a horizontal drain pipe in a waste plumbing system should be
  	Selected Answer:   1/4 inch to 1/2 inch per foot Answers: 0 inches to 1/4 inch per foot   1/4 inch to 1/2 inch per foot 1/2 inch to 1 inch per foot 10° 20°

• Question 11

  1 out of 1 points

  	When plumbing vents extend more than 12 to 24 inches above the roof line, there is a danger of
  	Selected Answer:   frost closure in cold climates Answers:   frost closure in cold climates excessive draft excessive noise sewer gases traveling to neighbors birds building nests

• Question 12

  1 out of 1 points

  	Vents between the fixture and the trap on a waste plumbing system
  	Selected Answer:   may allow sewer gas to enter the house Answers: may cause clogging of the trap   may allow sewer gas to enter the house allow better venting allow traps to self-scour eliminate the need for wet venting

• Question 13

  0 out of 1 points

  	Sump pumps may run continuously for the following reasons EXCEPT
  	Selected Answer:   the float may be stuck Answers: there is a control problem   the GFCI is defective the float may be stuck the discharge line is disconnected the pump is undersized

• Question 14

  1 out of 1 points

  	In multi-family buildings, PVC or ABS plastic waste piping should not pass from one dwelling to the next because
  	Selected Answer:   fire separation may be compromised Answers: noise will travel between units sewer gas may move between units   fire separation may be compromised the pipe may rub against the party wall plastic pipe is not strong enough to handle waste from multiple units

• Question 15

  1 out of 1 points

  	The tail piece in a waste plumbing system is
  	Selected Answer:   the pipe that joins the fixture to the trap Answers: the cleanout at the end of a horizontal pipe   the pipe that joins the fixture to the trap the exit pipe from a trap the termination point of a vent the pipe that an automatic air vent is attached to

• Question 16

  0 out of 1 points

  	Water passing through a waste plumbing trap too quickly may
  	Selected Answer:   leave behind solids Answers:   siphon water out of the trap overwhelm the main drain pipe leave behind solids cause a vacuum lock in the vent pipe cause water hammer

• Question 17

  0 out of 1 points

  	All of the following drainage situations would be considered functional EXCEPT
  	Selected Answer:   2nd floor bathroom sink takes 25 seconds to drain Answers: 2nd floor bathroom sink takes 25 seconds to drain basement bathroom sink takes 15 seconds to drain   bathtub with 8 inches of water takes 6 minutes to drain island kitchen sink takes 60 seconds to drain all of the above

• Question 18

  1 out of 1 points

  	The best residential waste plumbing trap is a
  	Selected Answer:   P trap Answers: bell trap crown vented trap drum trap   P trap S trap

• Question 19

  1 out of 1 points

  	A loop vent in a waste plumbing system
  	Selected Answer:   is one method of venting an island sink Answers: joins the vent pipes in the attic are the pipes that join the toilet, sink and tub in a bathroom is the only vent system allowed for basement bathrooms   is one method of venting an island sink a method of providing an air gap to a dishwasher

• Question 20

  0 out of 1 points

  	Water passing through a waste plumbing trap too slowly may cause
  	Selected Answer:   clogs in the vent line Answers: clogs in the vent line   clogs in the trap water hammer failure of the trap to seal a cross connection

• Question 21

  1 out of 1 points

  	Toilets are unique plumbing fixtures because they
  	Selected Answer:   are self trapped Answers:   are self trapped are the only fixture to have two traps do not require venting are allowed to use a crown vented trap can be connected through the floor drain trap

• Question 22

  1 out of 1 points

  	Vent pipes differ from waste pipes in a plumbing system in that
  	Selected Answer:   traps are not required Answers: horizontal lines do not need to slope   traps are not required pipes can go from larger to smaller because vent pipes carry no load, supports are not needed they are always a different color

• Question 23

  1 out of 1 points

  	Waste plumbing traps that do not have a separate vent can generally be a maximum distance of __________ from the stack?
  	Selected Answer:   5 feet Answers: 4 inches 2 feet 3 feet   5 feet 12 feet

• Question 24

  0 out of 1 points

  	If a cool draft with no sewer odor is felt at a floor drain, the likely cause is
  	Selected Answer:   air blowing down the stack Answers: a missing trap air blowing down the stack   a downspout connected to the floor drain an empty trap a frozen main line

• Question 25

  1 out of 1 points

  	The main purpose of a trap is to
  	Selected Answer:   prevent sewer gas from entering the house Answers: stop valuables from reaching the main drain allow a place to pull out clogs slow the flow of water to prevent erosion of pipes   prevent sewer gas from entering the house stop noise from other drains