NGWA CERTIFIED PUMP INSTALLER (CPI) Questions
AND CORRECT ANSWERS (VERIFIED ANSWERS)
Q&A 2026 |INSTANT DOWNLOAD PDF
1. What is the primary source of water for a groundwater
well?
A. Runoff from paved surfaces
B. Lakes and rivers
C. Aquifers
D. Atmospheric humidity
Rationale: Groundwater wells draw water from saturated
underground rock or sediment layers.
➡️ C
2. The zone of saturation in the ground is where:
A. Soil is unsaturated
B. Plants absorb moisture
C. Spaces between particles are filled with water
D. Evaporation exceeds precipitation
Rationale: Saturation means pore space is fully
water-filled.
➡️ C
3. The water table refers to:
A. A surface water measurement
B. The upper level of the saturated zone
C. The soil surface
, D. Monthly rainfall average
Rationale: The water table marks where soil is completely
saturated.
➡️ B
4. A confined aquifer is:
A. Open to the atmosphere
B. Above the water table
C. Bounded by impermeable layers
D. Dry during droughts
Rationale: Confined aquifers are trapped between
impermeable strata.
➡️ C
5. Groundwater moves primarily due to:
A. Wind forces
B. Hydraulic gradients
C. Tidal cycles
D. Surface runoff
Rationale: Water flows from high to low hydraulic head.
➡️ B
6. Permeability describes:
A. Water quality
B. Color of soil
C. Ability of material to transmit water
D. Depth of well
, Rationale: Permeability affects groundwater flow.
➡️ C
7. Porosity is:
A. Water pressure
B. The percentage of void space in material
C. Pipe diameter
D. Pump capacity
Rationale: Porosity indicates how much water material
can store.
➡️ B
8. A well screen’s primary purpose is to:
A. Increase water temperature
B. Enhance chemical treatment
C. Prevent sediment from entering the pump
D. Reduce water flow
Rationale: Screens filter out sand/particles.
➡️ C
9. The term “drawdown” refers to:
A. Pump surface cleaning
B. Seasonal rainfall
C. Lowering of water level due to pumping
D. Well abandonment
Rationale: Drawdown is the drop in water level under
pumping conditions.
➡️ C
AND CORRECT ANSWERS (VERIFIED ANSWERS)
Q&A 2026 |INSTANT DOWNLOAD PDF
1. What is the primary source of water for a groundwater
well?
A. Runoff from paved surfaces
B. Lakes and rivers
C. Aquifers
D. Atmospheric humidity
Rationale: Groundwater wells draw water from saturated
underground rock or sediment layers.
➡️ C
2. The zone of saturation in the ground is where:
A. Soil is unsaturated
B. Plants absorb moisture
C. Spaces between particles are filled with water
D. Evaporation exceeds precipitation
Rationale: Saturation means pore space is fully
water-filled.
➡️ C
3. The water table refers to:
A. A surface water measurement
B. The upper level of the saturated zone
C. The soil surface
, D. Monthly rainfall average
Rationale: The water table marks where soil is completely
saturated.
➡️ B
4. A confined aquifer is:
A. Open to the atmosphere
B. Above the water table
C. Bounded by impermeable layers
D. Dry during droughts
Rationale: Confined aquifers are trapped between
impermeable strata.
➡️ C
5. Groundwater moves primarily due to:
A. Wind forces
B. Hydraulic gradients
C. Tidal cycles
D. Surface runoff
Rationale: Water flows from high to low hydraulic head.
➡️ B
6. Permeability describes:
A. Water quality
B. Color of soil
C. Ability of material to transmit water
D. Depth of well
, Rationale: Permeability affects groundwater flow.
➡️ C
7. Porosity is:
A. Water pressure
B. The percentage of void space in material
C. Pipe diameter
D. Pump capacity
Rationale: Porosity indicates how much water material
can store.
➡️ B
8. A well screen’s primary purpose is to:
A. Increase water temperature
B. Enhance chemical treatment
C. Prevent sediment from entering the pump
D. Reduce water flow
Rationale: Screens filter out sand/particles.
➡️ C
9. The term “drawdown” refers to:
A. Pump surface cleaning
B. Seasonal rainfall
C. Lowering of water level due to pumping
D. Well abandonment
Rationale: Drawdown is the drop in water level under
pumping conditions.
➡️ C
