ARPAS Exam (Latest Update 2025 /
2026) Coworkers Questions &
Answers | Grade A | 100% Correct
(Verified Solutions)
Animal Nutrition and Feeding (Questions 1–20)
Question 1
What is the primary energy source for ruminants?
A. Proteins
B. Volatile fatty acids (VFAs)
C. Lipids
D. Minerals
Answer: B. Volatile fatty acids (VFAs)
Rationale: VFAs, produced from rumen microbial fermentation, provide the primary energy for
ruminants like cattle and sheep.
Question 2
Which nutrient is critical for eggshell formation in laying hens?
A. Phosphorus
B. Calcium
C. Vitamin A
D. Iron
Answer: B. Calcium
Rationale: Calcium is essential for strong eggshell formation in poultry.
Question 3
What is the recommended crude protein level for growing beef calves (6–12 months)?
A. 5–8%
B. 12–16%
C. 20–24%
D. 28–32%
Answer: B. 12–16%
Rationale: Growing beef calves require 12–16% crude protein for optimal growth and muscle
development.
,Question 4
Which feed additive improves feed efficiency in finishing swine?
A. Ractopamine
B. Vitamin C
C. Sodium chloride
D. Zinc oxide
Answer: A. Ractopamine
Rationale: Ractopamine enhances muscle growth and feed efficiency in finishing pigs.
Question 5
What is a sign of phosphorus deficiency in dairy cows?
A. Increased milk yield
B. Poor bone development
C. Excessive salivation
D. Improved fertility
Answer: B. Poor bone development
Rationale: Phosphorus deficiency leads to weak bones and reduced growth in dairy cattle.
Question 6
Which feed is most suitable for early-weaned piglets?
A. High-fiber forage
B. Pelleted starter diet
C. Whole grains
D. Liquid molasses
Answer: B. Pelleted starter diet
Rationale: Pelleted starter diets are highly digestible and meet young piglets’ nutritional needs.
Question 7
What is the primary role of dietary fiber in ruminant diets?
A. Energy storage
B. Rumen health and function
C. Protein synthesis
D. Vitamin absorption
Answer: B. Rumen health and function
Rationale: Fiber promotes rumen fermentation and maintains healthy microbial activity.
Question 8
Which vitamin deficiency causes rickets in young poultry?
A. Vitamin A
B. Vitamin D
C. Vitamin E
, D. Vitamin K
Answer: B. Vitamin D
Rationale: Vitamin D deficiency impairs calcium absorption, leading to rickets in young birds.
Question 9
What is the ideal calcium-to-phosphorus ratio in a dairy cow’s diet?
A. 1:1
B. 2:1
C. 1:2
D. 3:1
Answer: B. 2:1
Rationale: A 2:1 calcium-to-phosphorus ratio supports bone health and milk production in dairy
cows.
Question 10
Which feed ingredient is a primary protein source for poultry?
A. Corn
B. Soybean meal
C. Wheat bran
D. Molasses
Answer: B. Soybean meal
Rationale: Soybean meal is a high-quality, protein-rich feed for poultry.
Question 11
What is a common symptom of ketosis in dairy cows?
A. Increased appetite
B. Weight loss and lethargy
C. Improved milk fat content
D. Enhanced fertility
Answer: B. Weight loss and lethargy
Rationale: Ketosis, caused by energy imbalance, leads to weight loss and lethargy in dairy cows.
Question 12
Which mineral is essential for eggshell quality in laying hens?
A. Magnesium
B. Selenium
C. Calcium
D. Zinc
Answer: C. Calcium
Rationale: Calcium is critical for strong eggshells in laying hens.
Question 13
2026) Coworkers Questions &
Answers | Grade A | 100% Correct
(Verified Solutions)
Animal Nutrition and Feeding (Questions 1–20)
Question 1
What is the primary energy source for ruminants?
A. Proteins
B. Volatile fatty acids (VFAs)
C. Lipids
D. Minerals
Answer: B. Volatile fatty acids (VFAs)
Rationale: VFAs, produced from rumen microbial fermentation, provide the primary energy for
ruminants like cattle and sheep.
Question 2
Which nutrient is critical for eggshell formation in laying hens?
A. Phosphorus
B. Calcium
C. Vitamin A
D. Iron
Answer: B. Calcium
Rationale: Calcium is essential for strong eggshell formation in poultry.
Question 3
What is the recommended crude protein level for growing beef calves (6–12 months)?
A. 5–8%
B. 12–16%
C. 20–24%
D. 28–32%
Answer: B. 12–16%
Rationale: Growing beef calves require 12–16% crude protein for optimal growth and muscle
development.
,Question 4
Which feed additive improves feed efficiency in finishing swine?
A. Ractopamine
B. Vitamin C
C. Sodium chloride
D. Zinc oxide
Answer: A. Ractopamine
Rationale: Ractopamine enhances muscle growth and feed efficiency in finishing pigs.
Question 5
What is a sign of phosphorus deficiency in dairy cows?
A. Increased milk yield
B. Poor bone development
C. Excessive salivation
D. Improved fertility
Answer: B. Poor bone development
Rationale: Phosphorus deficiency leads to weak bones and reduced growth in dairy cattle.
Question 6
Which feed is most suitable for early-weaned piglets?
A. High-fiber forage
B. Pelleted starter diet
C. Whole grains
D. Liquid molasses
Answer: B. Pelleted starter diet
Rationale: Pelleted starter diets are highly digestible and meet young piglets’ nutritional needs.
Question 7
What is the primary role of dietary fiber in ruminant diets?
A. Energy storage
B. Rumen health and function
C. Protein synthesis
D. Vitamin absorption
Answer: B. Rumen health and function
Rationale: Fiber promotes rumen fermentation and maintains healthy microbial activity.
Question 8
Which vitamin deficiency causes rickets in young poultry?
A. Vitamin A
B. Vitamin D
C. Vitamin E
, D. Vitamin K
Answer: B. Vitamin D
Rationale: Vitamin D deficiency impairs calcium absorption, leading to rickets in young birds.
Question 9
What is the ideal calcium-to-phosphorus ratio in a dairy cow’s diet?
A. 1:1
B. 2:1
C. 1:2
D. 3:1
Answer: B. 2:1
Rationale: A 2:1 calcium-to-phosphorus ratio supports bone health and milk production in dairy
cows.
Question 10
Which feed ingredient is a primary protein source for poultry?
A. Corn
B. Soybean meal
C. Wheat bran
D. Molasses
Answer: B. Soybean meal
Rationale: Soybean meal is a high-quality, protein-rich feed for poultry.
Question 11
What is a common symptom of ketosis in dairy cows?
A. Increased appetite
B. Weight loss and lethargy
C. Improved milk fat content
D. Enhanced fertility
Answer: B. Weight loss and lethargy
Rationale: Ketosis, caused by energy imbalance, leads to weight loss and lethargy in dairy cows.
Question 12
Which mineral is essential for eggshell quality in laying hens?
A. Magnesium
B. Selenium
C. Calcium
D. Zinc
Answer: C. Calcium
Rationale: Calcium is critical for strong eggshells in laying hens.
Question 13
