Course 004 Module — Water, Root-Zone, Nutrition & Irrigation Operations Check
Complete each item before opening the answer panel. Use missed rationales to return to the matching lesson.
1. What should be confirmed before attaching a pH or EC value to the crop record?
- The sample identity and required measurement context
- The likely deficiency
- The harvest date
- The fertilizer advertisement
Check answer and rationale
Answer: A. The sample identity and required measurement context
The sample identity and required measurement context. This preserves the Course 004 measurement, root-zone, nutrition, work-order, equipment or record-quality principle being assessed.
2. What does EC primarily describe?
- Exact nitrogen concentration
- Overall electrical conductivity influenced by dissolved ions, not the identity of each nutrient
- Acidity only
- Root disease severity
Check answer and rationale
Answer: B. Overall electrical conductivity influenced by dissolved ions, not the identity of each nutrient
Overall electrical conductivity influenced by dissolved ions, not the identity of each nutrient. This preserves the Course 004 measurement, root-zone, nutrition, work-order, equipment or record-quality principle being assessed.
3. What is needed to describe a dryback trend?
- One moisture reading
- Only hours since irrigation
- Repeated comparable root-zone observations over time
- A leaf photo without root-zone context
Check answer and rationale
Answer: C. Repeated comparable root-zone observations over time
Repeated comparable root-zone observations over time. This preserves the Course 004 measurement, root-zone, nutrition, work-order, equipment or record-quality principle being assessed.
4. One container is much wetter than nearby comparable containers after the same event. What should be documented?
- The entire room as overwatered
- A root-disease diagnosis
- A new nutrient recipe
- The localized moisture/delivery pattern and relevant context before assigning cause
Check answer and rationale
Answer: D. The localized moisture/delivery pattern and relevant context before assigning cause
The localized moisture/delivery pattern and relevant context before assigning cause. This preserves the Course 004 measurement, root-zone, nutrition, work-order, equipment or record-quality principle being assessed.
5. Why is plant stage useful when reviewing a nutrition-like symptom?
- Nutrient demand, allocation and symptom interpretation can change with development
- Stage proves a specific deficiency
- Stage replaces pH and EC
- Stage determines meter calibration
Check answer and rationale
Answer: A. Nutrient demand, allocation and symptom interpretation can change with development
Nutrient demand, allocation and symptom interpretation can change with development. This preserves the Course 004 measurement, root-zone, nutrition, work-order, equipment or record-quality principle being assessed.
6. Leaves show yellowing while root-zone measurements are abnormal. What should Technician I do first?
- Add fertilizer immediately
- Record the symptom pattern and measurement/root-zone context and escalate for supported diagnosis
- Record one nutrient deficiency as confirmed
- Ignore the measurements
Check answer and rationale
Answer: B. Record the symptom pattern and measurement/root-zone context and escalate for supported diagnosis
Record the symptom pattern and measurement/root-zone context and escalate for supported diagnosis. This preserves the Course 004 measurement, root-zone, nutrition, work-order, equipment or record-quality principle being assessed.
7. What should happen when the work-order zone and physical zone identity do not match?
- Choose one at random
- Irrigate both
- Pause and resolve the mismatch before execution
- Edit the work order after finishing
Check answer and rationale
Answer: C. Pause and resolve the mismatch before execution
Pause and resolve the mismatch before execution. This preserves the Course 004 measurement, root-zone, nutrition, work-order, equipment or record-quality principle being assessed.
8. A required delivery check fails after the controller runs. What should the technician record?
- Only the controller status
- The target volume as delivered
- Nothing unless plants wilt
- The actual failed delivery result and deviation response, not only controller completion
Check answer and rationale
Answer: D. The actual failed delivery result and deviation response, not only controller completion
The actual failed delivery result and deviation response, not only controller completion. This preserves the Course 004 measurement, root-zone, nutrition, work-order, equipment or record-quality principle being assessed.
9. What is the correct response to a fault outside Technician I repair authority?
- Perform only permitted safe/operator steps, document context and escalate
- Repair it anyway
- Hide the fault
- Change unrelated process settings
Check answer and rationale
Answer: A. Perform only permitted safe/operator steps, document context and escalate
Perform only permitted safe/operator steps, document context and escalate. This preserves the Course 004 measurement, root-zone, nutrition, work-order, equipment or record-quality principle being assessed.
10. A pH probe remains unstable after permitted verification. What is the best data-quality response?
- Use the average of unstable values as verified
- Treat the reading as suspect and escalate the instrument issue
- Copy the target
- Change solution until the meter looks stable
Check answer and rationale
Answer: B. Treat the reading as suspect and escalate the instrument issue
Treat the reading as suspect and escalate the instrument issue. This preserves the Course 004 measurement, root-zone, nutrition, work-order, equipment or record-quality principle being assessed.
11. What belongs in a reconstructable irrigation handoff?
- Only the planned schedule
- Only a diagnosis
- Actual completion/delivery status, deviations, checks, unresolved conditions and next action
- Only the technician name
Check answer and rationale
Answer: C. Actual completion/delivery status, deviations, checks, unresolved conditions and next action
Actual completion/delivery status, deviations, checks, unresolved conditions and next action. This preserves the Course 004 measurement, root-zone, nutrition, work-order, equipment or record-quality principle being assessed.
12. A work order planned an EC target but no actual measurement was captured. What should the record show?
- Use the target as the actual result
- Invent a likely EC
- Delete the target too
- The target as planned and the actual measurement as missing under the controlled process
Check answer and rationale
Answer: D. The target as planned and the actual measurement as missing under the controlled process
The target as planned and the actual measurement as missing under the controlled process. This preserves the Course 004 measurement, root-zone, nutrition, work-order, equipment or record-quality principle being assessed.