問題一覧
1
the tube attached to the ballcock and discharging into the overflow of a toilet tank is designed to
replenish the water seal of the bowl trap
2
faucet washers requiring replacement ina kitchen sink faucet may indicate wear of the faucet
seat
3
unions shall be installed on all large water heaters within one of the following distance
5 feet
4
reverse flow in a water supply system, caused by a vacuum is called back siphonage
true
5
the minimum size trap for a shower is
2 inches
6
a solar heated system used to temper or heat the hot water system shall be by the use of a double walled heat exchanger
false
7
hubless cast iron soil pipe coupling are properly installed by tightning the band screws as much as possible
false
8
what is the average depth of a graded ditch which is 9'-6" at one end and 3'-4" deep at the other end?
6.5
9
a waste pipe that discharges into and through a proper open connection is called
indirect waste line
10
three floor mounted water closets may be connected to a horizontal 3'' fixture branch wether flush tank or flush valve type
false
11
the small hole at the top end of the dip tube in a domestic water heater serves as a
siphon breaker
12
a grease interceptor installed on the same floor as the fixture shall have one half the liquid holding capacity of the fixture
true
13
a relief vent shall be connected to the vent stack above the rim of the fixture at least
6 inches
14
a vent pipe mut extend above the roof at least a minimum of 12 inches
true
15
the maximum temperature of water discharging into any part of the plumbing drainage
180 degrees
16
one fixture unit equals 8.5 gpm
false
17
a pipe makes an angle of 30 degrees from the vertical is considered
vertical
18
which of the following is the definition of "water service pipe"
the pipe from the water main to the building
19
if the rate of flow is doubled in any given size water pipe the pressure loss will be?
increased about 4 times
20
the illinios plumbing license law requires a licensed plumber for
replacing plumbing fixtures
21
a globe valve has very little resistance to flow
false
22
separate facilities for men and women are required when the restrooms for the public are required (building with occupancy of 100 perons)
true
23
a peppermint test is used for testing
the drainage system
24
where is the corporation stop located in the water service line
at the tap in the water main
25
a 1/2'' I.D new copper pipe will deliver as much water as a new 3/4'' galvanized steel pipe of the same length if operating at the same pressure
false
26
2 7/8 subtracted from from 7 3/4 is 4 7/8
true
27
the requirement for all soldered joints to be properly fluxed (lead Free) and made with approved lead free solder applies to water lines but not drains, waste and vents lines
false
28
atmospheric vacuum breakers shall be installed with the critical level above the flood level rim of the fixture they serve, and on the discharge side of the last control valve of the fixture. no shutoff valve or faucet shall be installed beyond the vacuum breaker.
true
29
the size of the drainage piping shall not be reduced in the direction of flow
true
30
the vertical distance between a fixture outlet and a trap weir shall be as short as practicable but in no case shall the tailpiece from any fixture exceed
24 inches
31
the intermingled use of different types of pipe and fittings for water service does not affect the rate of material deterioration?
false
32
which style water closet holds the least amount of water in its trap
flush down
33
the plumbing inspection of a plumbing system prior to covering walls and floors is called a
rough in inspection
34
the device known as the ___________ controls the water temperature maintained in a hot water tank for a single family use
thermostat
35
a compression joint is also known as a flare joint
false
36
the minimum size of any building drain or building sewer shall be determined on the basis of
total drainage fixture units