COSC 325 HOUSTON (PLUMBING) EXAM
QUESTIONS AND ANSWERS 100% PASS
2026/2027
SS - ANS Sanitary Sewer
ABS - ANS Black plastic material
VTR - ANS vent through roof
Primary Purpose of roof vent - ANS Let air into system
What division is plumbing - ANS 22
Invert Depth - ANS elevation of the bottom inside of the pipe
DW - ANS Domestic Water
CPVC (chlorinated polyvinyl chloride) - ANS hot and cold water supply, off white color
@2026 ALLRIGHTS RESERVED 1
, FDC - ANS Fire Department Connection
Above ground pipe material - ANS Metal
1 CFH (Cubic Feet per Hour) - ANS 1000Btu/h
OSHA requirement for fall protection - ANS 6 feet
OSHA requirement for trenching - ANS 5 feet
Wall thickness terms for copper - ANS Type L, K, M
DWV - ANS abbreviation for drainage, waste, and vent. Found on "p" sheets
What are the four groups of plumbing pipe and fitting material? - ANS Plastic, Copper, Cast
Iron, Steel
What is Expansion loop for? - ANS In plastic, provides an area for tubing to expand
What plastic pipe is common for DWV? - ANS Schedule 40 ABS
What is the max length of rigid plastic DWV pipe? - ANS 35'
What is ABS typically used for? - ANS Sanitary drainage, vent, aboveground and underground
storm water drainage.
@2026 ALLRIGHTS RESERVED 2
QUESTIONS AND ANSWERS 100% PASS
2026/2027
SS - ANS Sanitary Sewer
ABS - ANS Black plastic material
VTR - ANS vent through roof
Primary Purpose of roof vent - ANS Let air into system
What division is plumbing - ANS 22
Invert Depth - ANS elevation of the bottom inside of the pipe
DW - ANS Domestic Water
CPVC (chlorinated polyvinyl chloride) - ANS hot and cold water supply, off white color
@2026 ALLRIGHTS RESERVED 1
, FDC - ANS Fire Department Connection
Above ground pipe material - ANS Metal
1 CFH (Cubic Feet per Hour) - ANS 1000Btu/h
OSHA requirement for fall protection - ANS 6 feet
OSHA requirement for trenching - ANS 5 feet
Wall thickness terms for copper - ANS Type L, K, M
DWV - ANS abbreviation for drainage, waste, and vent. Found on "p" sheets
What are the four groups of plumbing pipe and fitting material? - ANS Plastic, Copper, Cast
Iron, Steel
What is Expansion loop for? - ANS In plastic, provides an area for tubing to expand
What plastic pipe is common for DWV? - ANS Schedule 40 ABS
What is the max length of rigid plastic DWV pipe? - ANS 35'
What is ABS typically used for? - ANS Sanitary drainage, vent, aboveground and underground
storm water drainage.
@2026 ALLRIGHTS RESERVED 2