Multiple Choice
Identify the
letter of the choice that best completes the statement or answers the question.
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You
and your teammates have developed a reputation of knowing quite a bit about poultry through your FFA
training. A local broiler company is having serious problems in their hatchery, and as a class
project your team has been given the task of going in and identifying what the cause(s) of these
problems might be. You have arrived at the hatchery this morning just as they are taking
today's hatch out of the incubators. Here is what you observe:
-Total number of
eggs set | 100,000 | -Number of
infertile eggs | 15,000 | -Number of early
dead embryos | 4,000 | -Number of late
dead embryos | 3,000 | -Number of
cracked eggs (setter & farm) | 2,000 | -Number of
pipped but unhatched eggs | 2,000 | -Number of eggs
set upside down | 1,000 | -Number of
chicks hatched at 21 days | 1,000 | -Number of
chicks hatched at 21.3 days | 8,000 | -Number of
chicks hatched at 21.6 days | 20,000 | -Number of
chicks hatched at 21.9 days | 47,000 | -Total chicks
hatched | 77,000 | -Days eggs
stored prior to setting | 10 | -Egg storage
room temperature | 55.5F | -Setter
temperature | 98.5F | -Setter relative
humidity | 65% | -Average egg
weight | 2.7 ounces | | |
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| 1. | What
was the actual percent hatchability of this batch of eggs?
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| 2. | What
was the percent fertility of the eggs set?
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| 3. | What
was the percent of fertile eggs hatched?
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| 4. | Based
on the hatching characteristics you observed which of the following do you suspect to be
true? a. | chicks are
hatching too slow | b. | chicks are hatching too fast | c. | setter
temperature is too high | d. | hatcher oxygen levels are too high | | |
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| 5. | Which
of the following might be a cause of a slow hatch? a. | cracked
eggs | b. | excessive
storage time | c. | eggs set upside down | d. | excessive
incubator temperature | | |
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| 6. | Which
of the following might result in eggs hatching more quickly? a. | setting small
eggs | b. | setting large
eggs | c. | setting
eggs stored for long periods | d. | setting eggs sprayed with
disinfectant | | |
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| 7. | Improper temperature and humidity inside the setter and/or hatcher can affect time of
hatch. Which of the following combinations would likely delay hatching time the
most? a. | low temperature
and low humidity | b. | low temperature and high humidity | c. | high temperature
and low humidity | d. | high temperature and high humidity | | |
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| 8. | According to your FFA Poultry Manual, eggs should lose approximately 12% of their
weight during the hatching process. Which of the following would likely cause decreased
egg weight loss? a. | low
humidity | b. | high humidity | c. | low
fertility | d. | high fertility | | |
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| 9. | Egg
weight affects hatching time. Which of the following is generally true? a. | young hens lay
larger eggs than older hens | b. | small eggs hatch slower than large
eggs | c. | large eggs hatch
slower than small eggs | d. | older males produce larger eggs than younger
males | | |
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| 10. | A
relatively high number of embryos died early in the incubation period. What might be the cause
of this early embryo mortality? a. | high infertility | b. | low
infertility | c. | prolonged or improper egg storage before
incubation | d. | low numbers of floor eggs | | |
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| 11. | In
addition, late mortality was also high. Which of the following is not a typical cause of
late deads? a. | low setter
temperature | b. | egg contamination | c. | poor egg
storage | d. | inadequate photoperiod | | |
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| 12. | What
might be the cause of the high infertility observed in this hatch? a. | disease in the
breeder flocks | b. | breeder males are overweight | c. | breeder male to
female ratio is too low | d. | all of the above | | |
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| 13. | Careful control of the nutrition of breeders is required to ensure fertility of
hatching eggs. In that regard, which of the following is true? a. | uniform breeder
hen weights encourage uniform egg size | b. | uniform egg size promotes uniform hatch
time | c. | proper body
weight affects male fertility | d. | all of the above | | |
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| 14. | Bacterial contamination of eggs can be a major problem in the hatchery. Which of
the following contribute to egg contamination? a. | high numbers of floor eggs due to poor nest
management | b. | moisture condensing on eggs due to improper egg
storage | c. | neither A nor B | | |
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| 15. | Once
these boiler chicks are placed in the broiler house would you expect that: a. | these chicks
would grow more slowly than other chicks? | b. | first week mortality would likely be
higher? | c. | these chicks would have higher yield than other
chicks? | d. | these chicks would be more susceptible to heat
stress? | | |
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