Free CID-AG Practice Questions

Question 1

A pump installation has available NPSH below required NPSH. What problem is the designer primarily preventing?

Accepted Answer

Cavitation

Answer

Emitter clogging

Answer

Low soil intake

Answer

Poor crop coefficient

Question 2

Increasing pipe diameter while maintaining flow generally has what hydraulic effect?

Accepted Answer

Reduces friction loss

Answer

Increases soil tension

Answer

Reduces crop ET

Answer

Increases emitter variation

Question 3

Field capacity is 30% and permanent wilting point is 12%. The difference represents:

Accepted Answer

Plant-available water

Answer

Pump efficiency

Answer

Pipe pressure class

Answer

Nozzle discharge

Question 4

A designer uses ET0 and a crop coefficient. The result represents:

Accepted Answer

Crop evapotranspiration

Answer

Brake horsepower

Answer

Pipe velocity

Answer

Filter capacity

Question 5

A system distributes water evenly but loses much of the applied water before storage in the root zone. It has:

Accepted Answer

High uniformity but low application efficiency

Answer

Low uniformity but high efficiency

Answer

Low uniformity and high efficiency

Answer

No measurable performance

Question 6

A technician calculates resistance from voltage and current measurements. Which relationship applies?

Accepted Answer

Ohm law

Answer

Bernoulli equation

Answer

Hazen-Williams equation

Answer

Affinity law

Question 7

A drip designer compares energy cost against uniformity improvement. Which tradeoff should be evaluated?

Accepted Answer

Uniformity, energy use, and annual cost

Answer

Only tubing color

Answer

Only soil texture

Answer

Only installation labor

Question 8

A microirrigation system has emitter clogging from suspended particles. The best design response is:

Accepted Answer

Proper filtration selection

Answer

Higher pump speed only

Answer

Less frequent irrigation

Answer

Removing pressure regulation

Question 9

An emitter discharge exponent describes the relationship between:

Accepted Answer

Emitter flow and pressure

Answer

Fertilizer and crop yield

Answer

Soil texture and salinity

Answer

Pump speed and voltage

Question 10

Injecting fertilizer through irrigation water is called:

Accepted Answer

Fertigation

Answer

Backflow prevention

Answer

Flushing

Answer

Pressure regulation

Free CID-AG Practice Questions

Domain 1: Pumps (15%-20%)

Question 1

Domain 2: Hydraulics (20%-25%)

Question 2

Domain 4: Soil-Water-Plant Relations (15%-20%)

Question 3

Domain 5: Scheduling (10%-15%)

Question 4

Domain 6: Efficiency/Uniformity (10%-15%)

Question 5

Domain 7: System Components (10%-15%)

Question 6

Domain 8: System Design/Economics (20%-25%)

Question 7

Domain 10: Filtration (15%-20%)

Question 8

Domain 11: Emitting Devices (5%-10%)

Question 9

Domain 12: Injection (5%-10%)

Question 10

The rest of the CID-AG blueprint

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