MASTER PLUMBER EXAM SCRIPT FULL
QUESTIONS AND CORRECT ANSWERS
REVIEW
●● Copper tube and fittings used for drainage and vent piping installed
aboveground shall be at least ____.
A. Type DWV
B. Type L
C. Type K
D. Type M
Answer: A
●● A domestic dishwasher drain shall first connect to ____.
A. an approved airgap fitting
B. a double-check valve
C. a triple-check valve
D. an approved valve
Answer: A
,●● Unions shall be installed in a water supply system within ____ to a
water heater
A. 36 inches
B. 12 inches
C. 24 inches
D. 48 inches
Answer: B
●● A branch line serving a trap in a combination waste and vent system
is required to be separately vented when the length of the branch
exceeds ____.
A. 15
B. 10
C. 5
D. 25
Answer: A
●● Three-inch horizontal drainage piping shall be run in practical
alignment and at a uniform slope of not less than:
A. 1/4 inch per foot
,B. 1/16 inch per foot
C. 1/2 inch per foot
D. 1/8 inch per foot
Answer: A
●● The minimum requirement for the slope of horizontal drainage pipes
between manholes is
A. 4%
B. 2-1/2 %
C. 2%
D. 3%
Answer: C
●● A drain connecting the compartments of a set of fixtures to its trap is
called a(an) ____.
A. continuous waste
B. special waste
C. indirect waste
D. combination waste and vent
Answer: A
, ●● The maximum number of lavatories on a 2-1/2 inch horizontal waste
line is ____.
A. 10
B. 14
C. 20
D. 6
Answer: B
●● The maximum distance a gas shutoff valve may be from a gas
appliance (except for range and dryer connectors) is ____.
A. 6 feet
B. 10feet
C. 3 feet
D. 2 feet
Answer: A
●● An ejector discharge line shall be provided with a ____
A. gate valve only
B. backwater valve and gate valve
C. backwater valve only
QUESTIONS AND CORRECT ANSWERS
REVIEW
●● Copper tube and fittings used for drainage and vent piping installed
aboveground shall be at least ____.
A. Type DWV
B. Type L
C. Type K
D. Type M
Answer: A
●● A domestic dishwasher drain shall first connect to ____.
A. an approved airgap fitting
B. a double-check valve
C. a triple-check valve
D. an approved valve
Answer: A
,●● Unions shall be installed in a water supply system within ____ to a
water heater
A. 36 inches
B. 12 inches
C. 24 inches
D. 48 inches
Answer: B
●● A branch line serving a trap in a combination waste and vent system
is required to be separately vented when the length of the branch
exceeds ____.
A. 15
B. 10
C. 5
D. 25
Answer: A
●● Three-inch horizontal drainage piping shall be run in practical
alignment and at a uniform slope of not less than:
A. 1/4 inch per foot
,B. 1/16 inch per foot
C. 1/2 inch per foot
D. 1/8 inch per foot
Answer: A
●● The minimum requirement for the slope of horizontal drainage pipes
between manholes is
A. 4%
B. 2-1/2 %
C. 2%
D. 3%
Answer: C
●● A drain connecting the compartments of a set of fixtures to its trap is
called a(an) ____.
A. continuous waste
B. special waste
C. indirect waste
D. combination waste and vent
Answer: A
, ●● The maximum number of lavatories on a 2-1/2 inch horizontal waste
line is ____.
A. 10
B. 14
C. 20
D. 6
Answer: B
●● The maximum distance a gas shutoff valve may be from a gas
appliance (except for range and dryer connectors) is ____.
A. 6 feet
B. 10feet
C. 3 feet
D. 2 feet
Answer: A
●● An ejector discharge line shall be provided with a ____
A. gate valve only
B. backwater valve and gate valve
C. backwater valve only
