AR IR Irrigation Contractor Exam
Questions And Correct Answers
(Verified Answers) Plus Rationale2026
Q&A| Instant Download Pdf
1. What is the primary purpose of an irrigation system?
A) Increase soil erosion
B) Reduce crop growth
C) Provide water to crops efficiently
D) Increase rainfall
Answer: C
Rationale: Efficient irrigation systems supply water to crops in a controlled
manner to maximize growth and yield.
2. Which of the following is a common method of surface irrigation?
A) Drip irrigation
B) Sprinkler irrigation
C) Furrow irrigation
D) Subsurface irrigation
Answer: C
Rationale: Furrow irrigation is a type of surface irrigation where water
flows through small parallel channels along the field.
3. Drip irrigation is most suitable for:
A) Large open fields
B) Flood-prone areas
C) High-value crops and water-sensitive areas
D) Marshy land
,Answer: C
Rationale: Drip irrigation delivers water directly to plant roots, minimizing
water loss and increasing efficiency for high-value crops.
4. What is the main disadvantage of sprinkler irrigation?
A) Low installation cost
B) High evaporation and wind loss
C) Uniform water distribution
D) Reduced labor requirement
Answer: B
Rationale: Sprinkler systems are prone to water loss due to evaporation and
wind drift, especially in hot or windy conditions.
5. In irrigation design, what does the term “head” refer to?
A) Water pipe diameter
B) Pressure or height of water available to move through the
system
C) Type of pump
D) Soil moisture content
Answer: B
Rationale: Head is the height of water above a point in the system or the
pressure available to move water through pipes or channels.
6. Which pump type is most commonly used in irrigation systems?
A) Centrifugal pump
B) Submersible pump
C) Gear pump
D) Reciprocating pump
Answer: B
Rationale: Submersible pumps are widely used because they efficiently lift
water from wells or reservoirs with minimal maintenance.
7. Waterlogging in irrigated fields is caused by:
A) Low water supply
B) Excess fertilizer
, C) Excessive irrigation or poor drainage
D) Soil compaction
Answer: C
Rationale: Over-irrigation or inadequate drainage can lead to water
accumulation, which harms crops and soil structure.
8. Which type of soil has the highest water-holding capacity?
A) Sand
B) Silt
C) Clay
D) Gravel
Answer: C
Rationale: Clay soils have fine particles and can retain more water, but they
drain slowly.
9. The purpose of a filter in a drip irrigation system is to:
A) Reduce water pressure
B) Remove particles to prevent emitter clogging
C) Increase flow rate
D) Fertilize water
Answer: B
Rationale: Filters prevent debris from clogging small drip emitters, ensuring
uniform water application.
10. Which of the following is considered a micro-irrigation method?
A) Flood irrigation
B) Furrow irrigation
C) Drip irrigation
D) Basin irrigation
Answer: C
Rationale: Micro-irrigation systems like drip and micro-sprinklers deliver
water directly to the root zone with minimal waste.
11. What is the main purpose of irrigation scheduling?
A) Reduce crop growth
Questions And Correct Answers
(Verified Answers) Plus Rationale2026
Q&A| Instant Download Pdf
1. What is the primary purpose of an irrigation system?
A) Increase soil erosion
B) Reduce crop growth
C) Provide water to crops efficiently
D) Increase rainfall
Answer: C
Rationale: Efficient irrigation systems supply water to crops in a controlled
manner to maximize growth and yield.
2. Which of the following is a common method of surface irrigation?
A) Drip irrigation
B) Sprinkler irrigation
C) Furrow irrigation
D) Subsurface irrigation
Answer: C
Rationale: Furrow irrigation is a type of surface irrigation where water
flows through small parallel channels along the field.
3. Drip irrigation is most suitable for:
A) Large open fields
B) Flood-prone areas
C) High-value crops and water-sensitive areas
D) Marshy land
,Answer: C
Rationale: Drip irrigation delivers water directly to plant roots, minimizing
water loss and increasing efficiency for high-value crops.
4. What is the main disadvantage of sprinkler irrigation?
A) Low installation cost
B) High evaporation and wind loss
C) Uniform water distribution
D) Reduced labor requirement
Answer: B
Rationale: Sprinkler systems are prone to water loss due to evaporation and
wind drift, especially in hot or windy conditions.
5. In irrigation design, what does the term “head” refer to?
A) Water pipe diameter
B) Pressure or height of water available to move through the
system
C) Type of pump
D) Soil moisture content
Answer: B
Rationale: Head is the height of water above a point in the system or the
pressure available to move water through pipes or channels.
6. Which pump type is most commonly used in irrigation systems?
A) Centrifugal pump
B) Submersible pump
C) Gear pump
D) Reciprocating pump
Answer: B
Rationale: Submersible pumps are widely used because they efficiently lift
water from wells or reservoirs with minimal maintenance.
7. Waterlogging in irrigated fields is caused by:
A) Low water supply
B) Excess fertilizer
, C) Excessive irrigation or poor drainage
D) Soil compaction
Answer: C
Rationale: Over-irrigation or inadequate drainage can lead to water
accumulation, which harms crops and soil structure.
8. Which type of soil has the highest water-holding capacity?
A) Sand
B) Silt
C) Clay
D) Gravel
Answer: C
Rationale: Clay soils have fine particles and can retain more water, but they
drain slowly.
9. The purpose of a filter in a drip irrigation system is to:
A) Reduce water pressure
B) Remove particles to prevent emitter clogging
C) Increase flow rate
D) Fertilize water
Answer: B
Rationale: Filters prevent debris from clogging small drip emitters, ensuring
uniform water application.
10. Which of the following is considered a micro-irrigation method?
A) Flood irrigation
B) Furrow irrigation
C) Drip irrigation
D) Basin irrigation
Answer: C
Rationale: Micro-irrigation systems like drip and micro-sprinklers deliver
water directly to the root zone with minimal waste.
11. What is the main purpose of irrigation scheduling?
A) Reduce crop growth
