TX General Pump Installer Practice Exam
,Question 1: A groundwater pumping system installation project in Travis
County, Texas requires technical specification compliance. A licensed Texas
General Pump Installer in Travis County is hired to install a new 15 GPM
submersible pump in a newly drilled domestic well. According to 16 Texas
Administrative Code (TAC) Chapter 76, within how many calendar days must
the pump installer submit the State of Texas Pump Installer Report to the
Texas Department of Licensing and Regulation (TDLR) and the well owner?
A. Within 14 business days from the date of final electrical inspection
B. Within 90 days after receiving full payment from the landowner
C. Within 60 days from the date the installation or repair is completed
D. Within 30 calendar days from the date the installation or modification is completed
Answer: D
Rationale: 16 TAC § 76.70 mandates that a licensed pump installer must complete
and submit a Pump Installer Report to TDLR, the landowner, and the local
groundwater conservation district (if applicable) within 30 days of completing the
pump installation or repair.
Question 2: According to 16 TAC § 76.1000 technical standards, what is the
minimum required height that a water well casing must extend above the
finished ground surface or highest known flood elevation?
A. Flush with the slab provided an O-ring seal is installed
B. At least 6 inches above ground surface regardless of flood history
C. At least 12 inches above ground level or flood level, whichever is higher
D. At least 24 inches above ground level only in agricultural zones
Answer: C
Rationale: 16 TAC § 76.1000 requires all well casings to extend at least 12 inches
above the natural ground surface or 12 inches above the highest known flood
elevation to safeguard against surface runoff contamination.
,Question 3: A pump installer in Bexar County is sizing a submersible pump
for a domestic well. The static water level is 120 feet below ground, pumping
drawdown adds 30 feet, the elevation lift from wellhead to the pressure tank
is 25 feet, friction loss in the pipe equals 15 feet, and target tank operating
pressure is 40 to 60 PSI (cut-out at 60 PSI). What is the total dynamic head
(TDH) required at cut-out? (1 PSI = 2.31 ft)
A. TDH = Static Water Level x Operating Pressure in PSI / 2.31
B. TDH = Pumping Water Level + Elevation Head + Friction Loss + Pressure Head
(converted to feet of head)
C. TDH = Casing Depth + Motor Horsepower x 2.31
D. TDH = Drawdown + Friction Loss - Static Water Level
Answer: B
Rationale: Total Dynamic Head (TDH) is the sum of total vertical lift (Static Water
Level + Drawdown + Elevation Gain), total friction head loss in pipes/fittings, and
required system operating pressure head (60 PSI x 2.31 ft/PSI = 138.6 ft). In the
scenario: 150 ft pumping level + 25 ft elevation + 15 ft friction + 138.6 ft pressure =
328.6 ft TDH.
Question 4: Under standard electrical guidelines for water well pumping
systems, what is the maximum acceptable voltage drop between the power
source and the submersible motor terminals under full load conditions?
A. 10% maximum voltage drop for single-phase systems only
B. 1% maximum voltage drop regardless of cable length
C. 5% maximum voltage drop (3% on feeder, 2% on branch circuit)
D. 15% maximum voltage drop during continuous running
Answer: C
Rationale: The NEC recommends that total voltage drop should not exceed 5%
under full load conditions to ensure proper motor torque, prevent thermal overload
tripping, and maintain motor service life.
, Question 5: A technician in Dallas County is servicing a pre-charged
diaphragm pressure tank with a pressure switch set to 30 PSI cut-in and 50
PSI cut-out. What should the air pre-charge pressure inside the empty tank
be adjusted to when system water pressure is zero?
A. 2 PSI below the pressure switch cut-in setting (28 PSI for a 30/50 switch)
B. Equal to the exact cut-out pressure setting (50 PSI)
C. 10 PSI below the cut-in setting (20 PSI for a 30/50 switch)
D. 5 PSI above the cut-out setting (55 PSI for a 30/50 switch)
Answer: A
Rationale: Pre-charged diaphragm pressure tanks must be set 2 PSI below the
cut-in pressure (with zero system water pressure) to prevent the diaphragm from
bottoming out and causing pressure fluctuations or pump short-cycling.
Question 6: What is the standard procedure to correct reverse rotation on a
three-phase AC electric pump motor?
A. Increase the VFD carrier frequency to 16 kHz
B. Swap any two of the three incoming motor power leads (L1, L2, or L3)
C. Swap the ground wire with the neutral wire
D. Reverse the pressure switch signal wire polarity
Answer: B
Rationale: Swapping any two phase conductors (L1-L2, L2-L3, or L1-L3) reverses
the magnetic phase sequence and flips the rotational direction of a three-phase AC
motor.
,Question 1: A groundwater pumping system installation project in Travis
County, Texas requires technical specification compliance. A licensed Texas
General Pump Installer in Travis County is hired to install a new 15 GPM
submersible pump in a newly drilled domestic well. According to 16 Texas
Administrative Code (TAC) Chapter 76, within how many calendar days must
the pump installer submit the State of Texas Pump Installer Report to the
Texas Department of Licensing and Regulation (TDLR) and the well owner?
A. Within 14 business days from the date of final electrical inspection
B. Within 90 days after receiving full payment from the landowner
C. Within 60 days from the date the installation or repair is completed
D. Within 30 calendar days from the date the installation or modification is completed
Answer: D
Rationale: 16 TAC § 76.70 mandates that a licensed pump installer must complete
and submit a Pump Installer Report to TDLR, the landowner, and the local
groundwater conservation district (if applicable) within 30 days of completing the
pump installation or repair.
Question 2: According to 16 TAC § 76.1000 technical standards, what is the
minimum required height that a water well casing must extend above the
finished ground surface or highest known flood elevation?
A. Flush with the slab provided an O-ring seal is installed
B. At least 6 inches above ground surface regardless of flood history
C. At least 12 inches above ground level or flood level, whichever is higher
D. At least 24 inches above ground level only in agricultural zones
Answer: C
Rationale: 16 TAC § 76.1000 requires all well casings to extend at least 12 inches
above the natural ground surface or 12 inches above the highest known flood
elevation to safeguard against surface runoff contamination.
,Question 3: A pump installer in Bexar County is sizing a submersible pump
for a domestic well. The static water level is 120 feet below ground, pumping
drawdown adds 30 feet, the elevation lift from wellhead to the pressure tank
is 25 feet, friction loss in the pipe equals 15 feet, and target tank operating
pressure is 40 to 60 PSI (cut-out at 60 PSI). What is the total dynamic head
(TDH) required at cut-out? (1 PSI = 2.31 ft)
A. TDH = Static Water Level x Operating Pressure in PSI / 2.31
B. TDH = Pumping Water Level + Elevation Head + Friction Loss + Pressure Head
(converted to feet of head)
C. TDH = Casing Depth + Motor Horsepower x 2.31
D. TDH = Drawdown + Friction Loss - Static Water Level
Answer: B
Rationale: Total Dynamic Head (TDH) is the sum of total vertical lift (Static Water
Level + Drawdown + Elevation Gain), total friction head loss in pipes/fittings, and
required system operating pressure head (60 PSI x 2.31 ft/PSI = 138.6 ft). In the
scenario: 150 ft pumping level + 25 ft elevation + 15 ft friction + 138.6 ft pressure =
328.6 ft TDH.
Question 4: Under standard electrical guidelines for water well pumping
systems, what is the maximum acceptable voltage drop between the power
source and the submersible motor terminals under full load conditions?
A. 10% maximum voltage drop for single-phase systems only
B. 1% maximum voltage drop regardless of cable length
C. 5% maximum voltage drop (3% on feeder, 2% on branch circuit)
D. 15% maximum voltage drop during continuous running
Answer: C
Rationale: The NEC recommends that total voltage drop should not exceed 5%
under full load conditions to ensure proper motor torque, prevent thermal overload
tripping, and maintain motor service life.
, Question 5: A technician in Dallas County is servicing a pre-charged
diaphragm pressure tank with a pressure switch set to 30 PSI cut-in and 50
PSI cut-out. What should the air pre-charge pressure inside the empty tank
be adjusted to when system water pressure is zero?
A. 2 PSI below the pressure switch cut-in setting (28 PSI for a 30/50 switch)
B. Equal to the exact cut-out pressure setting (50 PSI)
C. 10 PSI below the cut-in setting (20 PSI for a 30/50 switch)
D. 5 PSI above the cut-out setting (55 PSI for a 30/50 switch)
Answer: A
Rationale: Pre-charged diaphragm pressure tanks must be set 2 PSI below the
cut-in pressure (with zero system water pressure) to prevent the diaphragm from
bottoming out and causing pressure fluctuations or pump short-cycling.
Question 6: What is the standard procedure to correct reverse rotation on a
three-phase AC electric pump motor?
A. Increase the VFD carrier frequency to 16 kHz
B. Swap any two of the three incoming motor power leads (L1, L2, or L3)
C. Swap the ground wire with the neutral wire
D. Reverse the pressure switch signal wire polarity
Answer: B
Rationale: Swapping any two phase conductors (L1-L2, L2-L3, or L1-L3) reverses
the magnetic phase sequence and flips the rotational direction of a three-phase AC
motor.
