ILLINOIS STATE PLUMBING CORE EXAMINATION
QUESTIONS AND ANSWERS SURE A+
✔✔At what psi shall torque wrenches be set to in order to properly tighten a mission
band or fernco? - ✔✔60 psi
✔✔What is the result of connecting different types of materials in the water piping
system? - ✔✔Increased deterioration of the pipe
✔✔How many gallons per minute are equal to one fixture unit? - ✔✔7.5
✔✔The minimum height a vent pipe must extend above the roof. - ✔✔12"
✔✔What is the purpose of the hole near the top end of a dip tube in a domestic water
heater? - ✔✔It acts a siphon breaker
✔✔Where is the corporation stop located on a water service line? - ✔✔At the tap to the
water main
✔✔What is the purpose of a peppermint test? - ✔✔Finding defects in the drainage
system
✔✔Which style of water closet holds the least amount of water in its trap? - ✔✔Flush
Down Water Closet
✔✔Minimum height above the flood rim of the fixture where a relief vent shall connect to
the vent stack. - ✔✔6"
✔✔The device which controls the water temperature maintained in a hot water tank for
single family use. - ✔✔Thermostat
, ✔✔Faucet washers requiring replacement in a kitchen sink faucet may indicate wear on
which part of the faucet? - ✔✔Seat
✔✔The tube attached to the ballcock and discharging into the tank of the toilet is
designed for what purpose? - ✔✔To replenish the water seal of the bowl trap
✔✔The maximum vertical distance between a fixture outlet and the trap weir. - ✔✔24"
✔✔Name of the plumbing inspection of a plumbing system prior to covering walls and
floors. - ✔✔Rough-In Inspection
✔✔Bath Tub:
Minimum Trap Size
Drainage Fixture Units - ✔✔1 1/2" Minimum Trap
2 Drainage Fixture Units
✔✔Clothes Washer:
Minimum Trap Size
Drainage Fixture Units - ✔✔2" Minimum Trap Size
3 Drainage Fixture Units
✔✔Floor Drain:
Minimum Trap Size
Drainage Fixture Units - ✔✔2" Minimum Trap Size
3 Drainage Fixture Units
✔✔Lavatory:
Minimum Trap Size
Drainage Fixture Units - ✔✔1 1/4" Minimum Trap Size
1 Drainage Fixture Unit
Increases to 2 DFU's at 1 1/2"
✔✔Shower:
Minimum Trap Size
Drainage Fixture Units - ✔✔2" Minimum Trap Size
3 Drainage Fixture Units
✔✔Kitchen Sink:
Minimum Trap Size
Drainage Fixture Units - ✔✔1 1/2" Minimum Trap Size
2 Drainage Fixture Units
✔✔Urinal:
QUESTIONS AND ANSWERS SURE A+
✔✔At what psi shall torque wrenches be set to in order to properly tighten a mission
band or fernco? - ✔✔60 psi
✔✔What is the result of connecting different types of materials in the water piping
system? - ✔✔Increased deterioration of the pipe
✔✔How many gallons per minute are equal to one fixture unit? - ✔✔7.5
✔✔The minimum height a vent pipe must extend above the roof. - ✔✔12"
✔✔What is the purpose of the hole near the top end of a dip tube in a domestic water
heater? - ✔✔It acts a siphon breaker
✔✔Where is the corporation stop located on a water service line? - ✔✔At the tap to the
water main
✔✔What is the purpose of a peppermint test? - ✔✔Finding defects in the drainage
system
✔✔Which style of water closet holds the least amount of water in its trap? - ✔✔Flush
Down Water Closet
✔✔Minimum height above the flood rim of the fixture where a relief vent shall connect to
the vent stack. - ✔✔6"
✔✔The device which controls the water temperature maintained in a hot water tank for
single family use. - ✔✔Thermostat
, ✔✔Faucet washers requiring replacement in a kitchen sink faucet may indicate wear on
which part of the faucet? - ✔✔Seat
✔✔The tube attached to the ballcock and discharging into the tank of the toilet is
designed for what purpose? - ✔✔To replenish the water seal of the bowl trap
✔✔The maximum vertical distance between a fixture outlet and the trap weir. - ✔✔24"
✔✔Name of the plumbing inspection of a plumbing system prior to covering walls and
floors. - ✔✔Rough-In Inspection
✔✔Bath Tub:
Minimum Trap Size
Drainage Fixture Units - ✔✔1 1/2" Minimum Trap
2 Drainage Fixture Units
✔✔Clothes Washer:
Minimum Trap Size
Drainage Fixture Units - ✔✔2" Minimum Trap Size
3 Drainage Fixture Units
✔✔Floor Drain:
Minimum Trap Size
Drainage Fixture Units - ✔✔2" Minimum Trap Size
3 Drainage Fixture Units
✔✔Lavatory:
Minimum Trap Size
Drainage Fixture Units - ✔✔1 1/4" Minimum Trap Size
1 Drainage Fixture Unit
Increases to 2 DFU's at 1 1/2"
✔✔Shower:
Minimum Trap Size
Drainage Fixture Units - ✔✔2" Minimum Trap Size
3 Drainage Fixture Units
✔✔Kitchen Sink:
Minimum Trap Size
Drainage Fixture Units - ✔✔1 1/2" Minimum Trap Size
2 Drainage Fixture Units
✔✔Urinal:
