ARPAS Dairy Cattle Exam 2025 || 100% Accurate Answers.
Rumen correct answers On the left side, 65% of stomach volume equaling 30 gallons at 10-20%
DM.
Papillae correct answers Small finger-like projections that increase absorption surface area of the
rumen. Low energy diets create shorter, high energy longer
Reticulum correct answers Second compartment of rumen stomach
Omasum correct answers 3rd stomach compartment. Many layers, absorbs water
Abomasum correct answers "True stomach"
Displaced abomasum correct answers Abomasum moves from lower right side to upper left
How long should cows ruminate per day? correct answers 8 to 10 hours
How many times should a cud be chewed to indicate adequate fiber? correct answers 50
Rumination cycle consists of: correct answers Regurgitation, rechewing, resalivation,
reswallowing
How much saliva does a cow produce? correct answers Up to 20 gallons
What causes bloat? correct answers When a cow cannot eructate (burp) or the gas in the rumen
forms a froth
Nonstructural carbohydrates correct answers Starch and sugar
Structural carbohydrates correct answers cellulose, hemicellulose, pectin
Peak milk happens when? correct answers 40 to 70 days after calving
First lactation peak milk happens when? correct answers 70 to 100 days after calving
First lactation peak milk should be what % of Mature? correct answers 75%
Max BCS Score cows can lose correct answers 0.5 point
Max weight loss to prevent repro/metabolic disorders correct answers 2# per day
Cows should be at what BCS prior to dry off? correct answers 3-3.25
Dry-off to 21 days before calving correct answers Dry cow period
Rumen correct answers On the left side, 65% of stomach volume equaling 30 gallons at 10-20%
DM.
Papillae correct answers Small finger-like projections that increase absorption surface area of the
rumen. Low energy diets create shorter, high energy longer
Reticulum correct answers Second compartment of rumen stomach
Omasum correct answers 3rd stomach compartment. Many layers, absorbs water
Abomasum correct answers "True stomach"
Displaced abomasum correct answers Abomasum moves from lower right side to upper left
How long should cows ruminate per day? correct answers 8 to 10 hours
How many times should a cud be chewed to indicate adequate fiber? correct answers 50
Rumination cycle consists of: correct answers Regurgitation, rechewing, resalivation,
reswallowing
How much saliva does a cow produce? correct answers Up to 20 gallons
What causes bloat? correct answers When a cow cannot eructate (burp) or the gas in the rumen
forms a froth
Nonstructural carbohydrates correct answers Starch and sugar
Structural carbohydrates correct answers cellulose, hemicellulose, pectin
Peak milk happens when? correct answers 40 to 70 days after calving
First lactation peak milk happens when? correct answers 70 to 100 days after calving
First lactation peak milk should be what % of Mature? correct answers 75%
Max BCS Score cows can lose correct answers 0.5 point
Max weight loss to prevent repro/metabolic disorders correct answers 2# per day
Cows should be at what BCS prior to dry off? correct answers 3-3.25
Dry-off to 21 days before calving correct answers Dry cow period
