Agricultural/Bioengineering Agricultural Structures and Environment 2 — Questions and Answers
Question 1: Which gas is the primary air quality concern in confined swine facilities?
- Carbon dioxide
- Ammonia (Correct answer)
- Methane
- Hydrogen
Correct answer: Ammonia
Ammonia released from manure is the principal air quality and health hazard in swine confinement housing.
Question 2: What is the function of a manure management lagoon?
- Store and biologically treat livestock manure (Correct answer)
- Collect rainwater for crop irrigation
- Separate solids for composting only
- Provide drinking water for livestock
Correct answer: Store and biologically treat livestock manure
An anaerobic lagoon stores and treats manure through biological decomposition before land application.
Question 3: In broiler housing design, litter management is critical because poor litter quality leads to:
- Increased egg production
- Paw and hock burns, respiratory disease, and reduced performance (Correct answer)
- Higher feed conversion ratios only
- Faster feather development
Correct answer: Paw and hock burns, respiratory disease, and reduced performance
Wet litter harbors pathogens, produces ammonia, and causes contact dermatitis (hock burn) in broilers.
Question 4: A vapor barrier in a livestock building is installed to:
- Prevent condensation and moisture damage to insulation and structural members (Correct answer)
- Block noise from outside
- Reflect radiant heat from walls
- Provide fire protection between wall layers
Correct answer: Prevent condensation and moisture damage to insulation and structural members
A vapor barrier on the warm side of insulation prevents warm, moist indoor air from condensing within the wall assembly.
Question 5: The purpose of eave openings in a naturally ventilated barn is to:
- Allow cool fresh air to enter at low velocity (Correct answer)
- Exhaust warm air at the ridge
- Provide emergency exit lighting
- Support gutter systems
Correct answer: Allow cool fresh air to enter at low velocity
Eave inlets allow fresh outside air to enter at the perimeter and flow up toward the ridge outlet.
Question 6: Which type of concrete floor finish is recommended for dairy cow alleys to reduce slipping?
- Smooth troweled finish
- Grooved or diamond-pattern finish (Correct answer)
- Painted epoxy finish
- Exposed aggregate with fine sand
Correct answer: Grooved or diamond-pattern finish
Grooved concrete alleys provide traction for cows, reducing slipping injuries and lameness.
Agricultural/Bioengineering Agricultural Structures and Environment 2
Which gas is the primary air quality concern in confined swine facilities?