Plumbing: Practice Exam with
Complete Solutions
The minimum diameter for a dry vent is - Answer 1 1/4 inches
The minimum clearance from the center of a water closet to walls, partitions or fixtures on
either side is: - Answer 15 inches
During a shower inspection you can determine compliance of safety glazing by - Answer
Looking for the manufacturer's label in the glass
Clothes washer discharge into a laundry tub must be protected by - Answer An air break
A water heater inspection includes checking for all of the following features EXCEPT: - Answer
Vacuum breaker installation
The minimum average static pressure at the building entrance for public or private water service
is: - Answer 40 psi
When inspecting a combination pressure/temperature relief valve, which of the following
conditions is NOT acceptable? - Answer The discharge pipe is the same size as the relief valve
outlet and not trapped
When inspecting a water heater, you find the following conditions. Which one is a violation? -
Answer The heater contains separate pressure and temperature relief valves
A kitchen drain, if properly trapped, will have a minimum water seal of: - Answer 2 inches
The minimum air gap for a kitchen faucet is: - Answer 1 1/2 inches
When a vent terminates less than 2 feet above a window, what is the minimum horizontal
distance required to the window opening? - Answer 10 feet
The minimum pitch for a 3-inch drain is _____ inch per foot? - Answer 1/8
Shower compartments must have a minimum curb height of at least: - Answer 2 inches
, Back siphonage of nonpotable liquids into the potable water supply piping may be prevented by
all of the following methods EXCEPT - Answer Check valve
Which of the following valves is required for water service shutoff for a Hosebib? - Answer
Stop and waste
The minimum clearance for accessibility for a 2-inch cleanout is how many inches? - Answer
12
A vent pipe shall not terminate within 10 feet horizontally of a window unless the vent is
extended at least what distance above the window? - Answer 2 feet
The total fall in a fixture drain due to pipe slope is limited to a maximum of _______. - Answer
one pipe diameter
Where a fixture is separately trapped, what is the maximum vertical distance permitted from
the fixture outlet to the trap weir? - Answer 24 inches
All of the following are common toilet problems EXCEPT - Answer excess pressure at tank
Soil pipes - Answer carry liquid and solid waste from a toilet
Which of the following drain pipes is typically used below grade? - Answer Clay
What type of trap is allowed by most plumbing codes? - Answer P-Trap
Common shower stall problems include all of the following EXCEPT - Answer Missing
Overflows
Supply water pressure inside the house should not exceed - Answer 80 psi
The supply water piping diameter inside houses should be at least - Answer 1 inch
Exhaust flues on gas- or oil-fired water heaters - Answer should have a slope of 1/4 inch per
foot up away from the heater.
Common faucet problems include all of the following EXCEPT - Answer no isolating valves
Complete Solutions
The minimum diameter for a dry vent is - Answer 1 1/4 inches
The minimum clearance from the center of a water closet to walls, partitions or fixtures on
either side is: - Answer 15 inches
During a shower inspection you can determine compliance of safety glazing by - Answer
Looking for the manufacturer's label in the glass
Clothes washer discharge into a laundry tub must be protected by - Answer An air break
A water heater inspection includes checking for all of the following features EXCEPT: - Answer
Vacuum breaker installation
The minimum average static pressure at the building entrance for public or private water service
is: - Answer 40 psi
When inspecting a combination pressure/temperature relief valve, which of the following
conditions is NOT acceptable? - Answer The discharge pipe is the same size as the relief valve
outlet and not trapped
When inspecting a water heater, you find the following conditions. Which one is a violation? -
Answer The heater contains separate pressure and temperature relief valves
A kitchen drain, if properly trapped, will have a minimum water seal of: - Answer 2 inches
The minimum air gap for a kitchen faucet is: - Answer 1 1/2 inches
When a vent terminates less than 2 feet above a window, what is the minimum horizontal
distance required to the window opening? - Answer 10 feet
The minimum pitch for a 3-inch drain is _____ inch per foot? - Answer 1/8
Shower compartments must have a minimum curb height of at least: - Answer 2 inches
, Back siphonage of nonpotable liquids into the potable water supply piping may be prevented by
all of the following methods EXCEPT - Answer Check valve
Which of the following valves is required for water service shutoff for a Hosebib? - Answer
Stop and waste
The minimum clearance for accessibility for a 2-inch cleanout is how many inches? - Answer
12
A vent pipe shall not terminate within 10 feet horizontally of a window unless the vent is
extended at least what distance above the window? - Answer 2 feet
The total fall in a fixture drain due to pipe slope is limited to a maximum of _______. - Answer
one pipe diameter
Where a fixture is separately trapped, what is the maximum vertical distance permitted from
the fixture outlet to the trap weir? - Answer 24 inches
All of the following are common toilet problems EXCEPT - Answer excess pressure at tank
Soil pipes - Answer carry liquid and solid waste from a toilet
Which of the following drain pipes is typically used below grade? - Answer Clay
What type of trap is allowed by most plumbing codes? - Answer P-Trap
Common shower stall problems include all of the following EXCEPT - Answer Missing
Overflows
Supply water pressure inside the house should not exceed - Answer 80 psi
The supply water piping diameter inside houses should be at least - Answer 1 inch
Exhaust flues on gas- or oil-fired water heaters - Answer should have a slope of 1/4 inch per
foot up away from the heater.
Common faucet problems include all of the following EXCEPT - Answer no isolating valves
