AGR 300 EXAM 2 (MODULE 5-7 UPDATED ACTUAL QUESTIONS AND CORRECT ANSWERS

AGR 300 EXAM 2 (MODULE 5-7 UPDATED ACTUAL
QUESTIONS AND CORRECT ANSWERS

Question:
1. Thermal conductivity of water refers to its ability to:
A.) Resist phase changes
B.) Store heat without changing temperature
C.) Transfer heat from deeper tissues toward the surface
D.) Evaporate readily at low temperatures
Answer:
C.) Transfer heat from deeper tissues toward the surface

Question:
2. Heat of vaporization is the energy required to:
A.) Move heat through water by conduction
B.) Melt 1 g of ice
C.) Convert 1 g of liquid water into vapor
D.) Raise 1 g of water by 1 °C
Answer:
C.) Convert 1 g of liquid water into vapor

Question:
3. A.) 6.5 - 8.5
B.) 4.0 - 5.0
C.) 5.5 - 6.0
D.) 9.0 - 11.0
Answer:
A.) 6.5 - 8.5

Question:
4. A positive total coliform result in a drinking water sample most strongly indicates:
A.) Water that is excessively hard
B.) A pathway for contamination and possible fecal contamination
C.) Only disinfection byproduct formation
D.) The guaranteed presence of disease-causing pathogens
Answer:
B.) A pathway for contamination and possible fecal contamination

Question:
5. According to the dehydration example and adaptations discussed:
A.) Severe dehydration (~8% BW loss) may require IV fluids in calves
B.) Calves are considered severely dehydrated at ~2% BW loss
C.) Camels cannot tolerate >10% BW water loss
D.) Camel urine becomes more dilute during dehydration
Answer:
A.) Severe dehydration (~8% BW loss) may require IV fluids in calves

,Question:
6. Which statement about sources of water is correct?
A.) Tissue catabolism never contributes water
B.) Only drinking water counts; feed water is negligible
C.) Metabolic water yield is greatest from fat, then starch, then protein
D.) Condensation reactions consume water
Answer:
C.) Metabolic water yield is greatest from fat, then starch, then protein

Question:
7. About what proportion of total body water is intracellular?
A.) 75%
B.) 35%
C.) 50%
D.) 65%
Answer:
D.) 65%

Question:
8. A common expression for expected consumption under thermo-neutral conditions is:
A.) 10-20 g water per g dry matter
B.) 0.2-0.5 g water per g dry matter
C.) 5-10 g water per g dry matter
D.) 2-5 g water per g dry matter
Answer:
D.) 2-5 g water per g dry matter

Question:
9. A persistent "rotten egg" odor in well water is typically due to hydrogen sulfide. A practical treatment
approach is:
A.) Shock chlorination once and no retesting
B.) Reverse osmosis only
C.) Aeration and/or chlorination followed by appropriate filtration
D.) Water softening only
Answer:
C.) Aeration and/or chlorination followed by appropriate filtration

Question:
10. In osmosis, water moves across membranes:
A.) From higher to lower solute concentration
B.) Only if energy (ATP) is provided
C.) Only through protein channels
D.) From lower to higher solute concentration
Answer:
D.) From lower to higher solute concentration

, Question:
11. After shock chlorinating a private well for bacterial contamination, a best■practice follow■up is to:
A.) Retest for bacteria after the chlorine has dissipated (about 1-2 weeks)
B.) Return equipment online immediately and avoid retesting
C.) Add vinegar to neutralize residual chlorine and drink immediately
D.) Skip flushing to keep a residual in the plumbing
Answer:
A.) Retest for bacteria after the chlorine has dissipated (about 1-2 weeks)

Question:
12. Which combination correctly matches species with their primary heat-loss strategy in the text?
A.) Pigs—panting; Cats—sweating
B.) Dogs/sheep/chickens—panting; Humans/horses—sweating
C.) Dogs—sweating; Horses—panting
D.) Cattle—panting only; Chickens—sweating
Answer:
B.) Dogs/sheep/chickens—panting; Humans/horses—sweating

Question:
13. Which is not listed as a role of water in metabolism?
A.) Dilution to maintain concentrations
B.) Source of essential amino acids
C.) Solvent and transport medium
D.) Lubrication (saliva, joints)
Answer:
B.) Source of essential amino acids

Question:
14. Which feed is highest in water content per the text?
A.) Silage
B.) Young vegetation/fruits
C.) Dry dog/cat food
D.) Hay
Answer:
B.) Young vegetation/fruits

Question:
15. Which treatment is commonly used to reduce water hardness in homes?
A.) Activated carbon filtration
B.) Simple sediment filtration
C.) Ion-exchange water softener
D.) Ultraviolet (UV) disinfection
Answer:
C.) Ion-exchange water softener