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WorksheetsChapter 13 JOINTS AND CONNECTIONS
Total questions: 10
Worksheet time: 5mins
What is the primary purpose of pressure testing pipe joints in a plumbing system?
A) To check for proper alignment
B) To ensure airtight and watertight connections
C) To confirm correct pipe size
D) To determine pipe thickness
2. What material is used to pack caulked joints in cast iron soil pipes before filling with molten lead?
A) Rubber
B) Oakum or hemp
C) Plastic sealant
D) Fiberglass
What is the minimum depth of molten pig lead required in a caulked joint?
A) 12.5 mm
B) 19 mm
C) 25.4 mm
D) 32 mm
When using threaded joints, where should the pipe joint material be applied?
A) On both male and female threads
B) Only on male threads
C) Only on female threads
D) On the entire pipe surface
What is the minimum wall thickness requirement for threaded plastic pipes?
A) Schedule 20
B) Schedule 40
C) Schedule 60
D) Schedule 80
What type of joint is used between lead pipe and brass or copper fittings?
A) Caulked joint
B) Threaded joint
C) Wiped lead joint
D) Solvent cement joint
Cement mortar joints are prohibited in which type of system?
A) New building sewers
B) Gas piping
C) Potable water lines
D) Vent pipes
What is the approved method for joining clay sewer pipes?
A) Caulked joints
B) Solvent cement joints
C) Neoprene gaskets
D) Soldered joints
Which type of joint is allowed in fixture drains and traps for easy maintenance?
A) Wiped joint
B) Slip joint
C) Threaded joint
D) Brazed joint
Which of the following is NOT considered an obstruction in the drainage system?
A) A fitting with a ledge that traps debris
B) A pipe connection with an internal shoulder
C) Enlarging a 76 mm closet bend to 102 mm
D) A sudden pipe size reduction
