TEXAS WATER WELL PUMP INSTALLER EXAMINATION NEWEST EVALUATED EXAM
PRACTICE 100 QUESTIONS 2026-2027|ORIGINAL QUESTIONS & ANSWERS
|DETAILED RATIONALES |HINTED COMPLETE EXAM PREP GRADED A+*INSTANT
DOWNLOAD PDF*
1. Which Texas agency administers the licensing program for water well pump
installers?
A. Texas Commission on Environmental Quality
B. Texas Water Development Board
C. Texas Department of Licensing and Regulation
D. Texas Department of State Health Services
Answer: C. Texas Department of Licensing and Regulation
TDLR administers the Texas Water Well Drillers and Pump Installers licensing
program under Texas Occupations Code Chapter 1902 and 16 TAC Chapter 76.
2. Which endorsement is specifically associated with installation of pumps
operated by a single-phase electrical system?
A. K
B. P
C. T
D. I
Answer: B. P
The P endorsement covers Single Phase Pumps. The K endorsement covers three-
phase pumps, while T covers turbine pumps.
3. What is the primary purpose of a check valve in a submersible pump
installation?
A. Increase motor horsepower
B. Prevent water from flowing backward through the pump
C. Increase well yield
D. Reduce electrical voltage
,Answer: B. Prevent water from flowing backward through the pump
A check valve prevents reverse flow when the pump stops and helps maintain
pressure in the discharge system.
4. A pump operates at 40 psi while delivering 50 gallons per minute. If the
system resistance increases substantially, what will normally happen to the
flow from a centrifugal pump?
A. Flow increases
B. Flow remains exactly constant
C. Flow decreases
D. Motor voltage becomes zero
Answer: C. Flow decreases
For a centrifugal pump, increasing system head generally moves the operating
point toward a lower flow rate.
5. What condition is most directly associated with pump cavitation?
A. Excessively high suction pressure
B. Local pressure falling below the liquid vapor pressure
C. Excessive electrical resistance
D. Excessive discharge pressure only
Answer: B. Local pressure falling below the liquid vapor pressure
Cavitation occurs when pressure becomes sufficiently low for vapor bubbles to
form and subsequently collapse, potentially damaging the pump.
6. Which condition is most likely to increase the risk of cavitation?
A. Increased available suction head
B. Reduced suction losses
C. Excessive suction lift
D. Larger suction piping
Answer: C. Excessive suction lift
,Greater suction lift reduces pressure available at the pump inlet and can promote
vapor formation.
7. What is the main purpose of a pressure tank in a private water system?
A. Remove dissolved minerals
B. Reduce unnecessary pump cycling
C. Increase well depth
D. Disinfect the well
Answer: B. Reduce unnecessary pump cycling
The pressure tank stores water under pressure so that small demands can be
supplied without immediately starting the pump.
8. A pressure switch is commonly used in a conventional well pump system to:
A. Measure well depth
B. Start and stop the pump according to system pressure
C. Measure water temperature
D. Filter suspended solids
Answer: B. Start and stop the pump according to system pressure
The pressure switch responds to system pressure and controls the pump motor
circuit at predetermined settings.
9. A pressure switch is set for 40/60 psi. What does the 40 psi setting normally
represent?
A. Maximum pressure
B. Cut-in pressure
C. Tank precharge pressure
D. Pump shutoff head
Answer: B. Cut-in pressure
The lower pressure setting is normally the cut-in pressure, at which the pump
starts.
, 10.For a conventional pressure tank system with a 40/60 psi pressure switch,
the typical air precharge of a properly installed captive-air tank with the
water pressure relieved is approximately:
A. 20 psi
B. 30 psi
C. 40 psi
D. 60 psi
Answer: B. 30 psi
The common setting is approximately 2 psi below the pressure-switch cut-in
pressure, provided the tank manufacturer permits that setting.
11.What is the most likely result of an incorrectly sized or failed pressure tank
in a pump system?
A. Reduced pump cycling
B. Increased pump cycling
C. Increased well depth
D. Elimination of pressure variation
Answer: B. Increased pump cycling
Insufficient usable tank volume can cause frequent starts and stops, increasing
motor and control wear.
12.What does total dynamic head primarily represent in a pumping system?
A. Only the depth of the well
B. The total energy per unit weight that the pump must supply
C. Only the pressure at the wellhead
D. Only the length of discharge pipe
Answer: B. The total energy per unit weight that the pump must supply
Total dynamic head includes static elevation differences, pressure requirements,
and friction or other system losses.
PRACTICE 100 QUESTIONS 2026-2027|ORIGINAL QUESTIONS & ANSWERS
|DETAILED RATIONALES |HINTED COMPLETE EXAM PREP GRADED A+*INSTANT
DOWNLOAD PDF*
1. Which Texas agency administers the licensing program for water well pump
installers?
A. Texas Commission on Environmental Quality
B. Texas Water Development Board
C. Texas Department of Licensing and Regulation
D. Texas Department of State Health Services
Answer: C. Texas Department of Licensing and Regulation
TDLR administers the Texas Water Well Drillers and Pump Installers licensing
program under Texas Occupations Code Chapter 1902 and 16 TAC Chapter 76.
2. Which endorsement is specifically associated with installation of pumps
operated by a single-phase electrical system?
A. K
B. P
C. T
D. I
Answer: B. P
The P endorsement covers Single Phase Pumps. The K endorsement covers three-
phase pumps, while T covers turbine pumps.
3. What is the primary purpose of a check valve in a submersible pump
installation?
A. Increase motor horsepower
B. Prevent water from flowing backward through the pump
C. Increase well yield
D. Reduce electrical voltage
,Answer: B. Prevent water from flowing backward through the pump
A check valve prevents reverse flow when the pump stops and helps maintain
pressure in the discharge system.
4. A pump operates at 40 psi while delivering 50 gallons per minute. If the
system resistance increases substantially, what will normally happen to the
flow from a centrifugal pump?
A. Flow increases
B. Flow remains exactly constant
C. Flow decreases
D. Motor voltage becomes zero
Answer: C. Flow decreases
For a centrifugal pump, increasing system head generally moves the operating
point toward a lower flow rate.
5. What condition is most directly associated with pump cavitation?
A. Excessively high suction pressure
B. Local pressure falling below the liquid vapor pressure
C. Excessive electrical resistance
D. Excessive discharge pressure only
Answer: B. Local pressure falling below the liquid vapor pressure
Cavitation occurs when pressure becomes sufficiently low for vapor bubbles to
form and subsequently collapse, potentially damaging the pump.
6. Which condition is most likely to increase the risk of cavitation?
A. Increased available suction head
B. Reduced suction losses
C. Excessive suction lift
D. Larger suction piping
Answer: C. Excessive suction lift
,Greater suction lift reduces pressure available at the pump inlet and can promote
vapor formation.
7. What is the main purpose of a pressure tank in a private water system?
A. Remove dissolved minerals
B. Reduce unnecessary pump cycling
C. Increase well depth
D. Disinfect the well
Answer: B. Reduce unnecessary pump cycling
The pressure tank stores water under pressure so that small demands can be
supplied without immediately starting the pump.
8. A pressure switch is commonly used in a conventional well pump system to:
A. Measure well depth
B. Start and stop the pump according to system pressure
C. Measure water temperature
D. Filter suspended solids
Answer: B. Start and stop the pump according to system pressure
The pressure switch responds to system pressure and controls the pump motor
circuit at predetermined settings.
9. A pressure switch is set for 40/60 psi. What does the 40 psi setting normally
represent?
A. Maximum pressure
B. Cut-in pressure
C. Tank precharge pressure
D. Pump shutoff head
Answer: B. Cut-in pressure
The lower pressure setting is normally the cut-in pressure, at which the pump
starts.
, 10.For a conventional pressure tank system with a 40/60 psi pressure switch,
the typical air precharge of a properly installed captive-air tank with the
water pressure relieved is approximately:
A. 20 psi
B. 30 psi
C. 40 psi
D. 60 psi
Answer: B. 30 psi
The common setting is approximately 2 psi below the pressure-switch cut-in
pressure, provided the tank manufacturer permits that setting.
11.What is the most likely result of an incorrectly sized or failed pressure tank
in a pump system?
A. Reduced pump cycling
B. Increased pump cycling
C. Increased well depth
D. Elimination of pressure variation
Answer: B. Increased pump cycling
Insufficient usable tank volume can cause frequent starts and stops, increasing
motor and control wear.
12.What does total dynamic head primarily represent in a pumping system?
A. Only the depth of the well
B. The total energy per unit weight that the pump must supply
C. Only the pressure at the wellhead
D. Only the length of discharge pipe
Answer: B. The total energy per unit weight that the pump must supply
Total dynamic head includes static elevation differences, pressure requirements,
and friction or other system losses.
