1What is the standard incubation period for a chicken egg?
A.21 days
B.35 days
C.28 days
D.18 days
Correct Answer: 21 days
Explanation:
The incubation period for domestic chicken (Gallus gallus domesticus) is consistently 21 days under optimal conditions.
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2In a forced-draft incubator, what is the recommended operating temperature during the setting phase (first 18 days)?
A.
B.
C.
D.
Correct Answer:
Explanation:
Forced-draft incubators circulate air to maintain a uniform temperature, which should ideally be between and ().
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3What is the 'Physiological Zero' temperature for poultry eggs, below which embryonic development ceases?
A. ()
B. ()
C. ()
D. ()
Correct Answer: ()
Explanation:
Physiological zero is the temperature below which cell division stops. For chicken eggs, this is approximately (). Storage temperatures are kept below this to suspend development.
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4Which position is recommended for setting eggs in the incubator tray?
A.Random placement
B.Broad end up
C.Horizontal
D.Small end up
Correct Answer: Broad end up
Explanation:
Eggs should be set with the broad end up because the air cell is located there. Setting them small end up often results in the embryo's head orienting toward the small end, causing malposition and death.
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5How often should eggs be turned during the incubation period to prevent the embryo from sticking to the shell membranes?
A.Turning is not required
B.Once a day
C.Minimum 4-6 times a day (ideally hourly)
D.Twice a day
Correct Answer: Minimum 4-6 times a day (ideally hourly)
Explanation:
Eggs must be turned frequently, usually automatically every hour or manually at least 4-6 times a day, to prevent adhesion of the embryo to the shell membrane and to distribute heat and nutrients.
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6At what angle should eggs be tilted during turning in an incubator?
A. from vertical
B. from vertical
C. from vertical
D. from vertical
Correct Answer: from vertical
Explanation:
Eggs are generally tilted either way from the vertical position during incubation to ensure proper positioning of the embryo.
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7When are chicken eggs typically transferred from the setter to the hatcher?
A.14th day
B.21st day
C.18th day
D.19th day
Correct Answer: 18th day
Explanation:
Eggs are transferred to the hatcher after 18 days of incubation. At this point, turning is stopped, and humidity is increased.
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8Compared to the setting phase, the relative humidity in the hatcher (last 3 days) should be:
A.Higher
B.Zero
C.Lower
D.Exactly the same
Correct Answer: Higher
Explanation:
Humidity should be increased (approx. 70-75% RH or wet bulb) during hatching to keep shell membranes soft and prevent chicks from sticking to the shell.
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9What is the primary purpose of candling during incubation?
A.To disinfect the shell
B.To heat the egg
C.To soften the shell for hatching
D.To identify infertile eggs and early embryonic mortality
Correct Answer: To identify infertile eggs and early embryonic mortality
Explanation:
Candling involves passing light through the egg to observe contents. It identifies infertile eggs ('clears') and dead embryos so they can be removed to preserve incubator space and hygiene.
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10Which chemicals are commonly used for fumigation of incubators and eggs?
A.Sodium Chloride and Vinegar
B.Potassium Permanganate and Formalin
C.Ethanol and Iodine
D.Bleach and Ammonia
Correct Answer: Potassium Permanganate and Formalin
Explanation:
Fumigation is typically done using Potassium Permanganate () and Formalin (40% Formaldehyde) to generate formaldehyde gas, which disinfects the incubator.
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11What is the incubation period for Turkey and Duck (excluding Muscovy) eggs?
A.35 days
B.21 days
C.28 days
D.24 days
Correct Answer: 28 days
Explanation:
The standard incubation period for Turkeys and most Duck breeds (like Pekin) is 28 days.
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12What is the standard incubation period for Muscovy Duck eggs?
A.42 days
B.28 days
C.35 days
D.30 days
Correct Answer: 35 days
Explanation:
Muscovy ducks have a longer incubation period compared to other poultry species, lasting 35 days.
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13The 'Brooding Period' generally refers to which age range of chicks?
A.Before hatching
B.0 to 8 weeks
C.20 to 72 weeks
D.8 to 20 weeks
Correct Answer: 0 to 8 weeks
Explanation:
Brooding is the management of chicks from one day old up to about 8 weeks of age, during which they require supplemental heat.
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14What is the recommended starting temperature under the hover/brooder for day-old chicks?
A.
B.
C.
D.
Correct Answer:
Explanation:
The standard starting temperature is () at the edge of the hover, 2 inches above the litter, for the first week.
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15What is the standard rule of thumb for reducing brooder temperature as chicks grow?
A.Keep constant for 4 weeks
B.Reduce by per week
C.Reduce by per week
D.Increase by per week
Correct Answer: Reduce by per week
Explanation:
The temperature should be reduced by per week until it reaches or ambient temperature.
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16If chicks in a brooder are huddled together directly under the heat source, what does this indicate?
A.There is a draft
B.The temperature is too low
C.The temperature is too high
D.They are hungry
Correct Answer: The temperature is too low
Explanation:
Huddling under the heat source indicates the chicks are cold. If they were hot, they would move far away from the source; if comfortable, they would be evenly distributed.
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17What is the primary function of a 'chick guard' or 'brooder guard'?
A.To keep chicks confined near the heat source and prevent floor drafts
B.To automatically dispense feed
C.To prevent predators
D.To separate male and female chicks
Correct Answer: To keep chicks confined near the heat source and prevent floor drafts
Explanation:
A brooder guard is a circular barrier used in the first week to keep chicks close to the warmth and prevent chilling drafts.
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18What is the recommended floor space per bird for broilers in a deep litter system up to marketing age?
A.1.0 sq. ft.
B.2.5 sq. ft.
C.0.25 sq. ft.
D.5.0 sq. ft.
Correct Answer: 1.0 sq. ft.
Explanation:
The general recommendation for broilers is 1.0 sq. ft. per bird to ensure adequate space for growth without overcrowding.
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19Which of the following is NOT a desirable quality of litter material used in brooding?
A.High thermal conductivity
B.Biodegradable
C.High moisture absorption
D.Free from molds and toxins
Correct Answer: High thermal conductivity
Explanation:
Litter should have low thermal conductivity to act as an insulator. High thermal conductivity would make the floor cold.
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20What is the 'Grower' stage in layer management?
A.21-72 weeks
B.72+ weeks
C.9-20 weeks
D.0-8 weeks
Correct Answer: 9-20 weeks
Explanation:
The grower stage follows the brooding stage and lasts until the birds reach sexual maturity (point of lay), typically 9-20 weeks.
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21Why is 'Restricted Feeding' practiced during the grower stage of layers?
A.To increase egg size immediately
B.To prevent obesity and early sexual maturity
C.To induce molting
D.To save feed cost only
Correct Answer: To prevent obesity and early sexual maturity
Explanation:
Restricted feeding prevents pullets from becoming too fat and laying too early, which results in small eggs and potential prolapse problems. It aims for uniform growth and larger initial eggs.
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22What is the Golden Rule of lighting for growers?
A.Provide no light
B.Keep light duration constant at 24 hours
C.Never increase light duration during the growing period
D.Always increase light duration
Correct Answer: Never increase light duration during the growing period
Explanation:
Increasing light during the grower phase stimulates early sexual maturity, which is undesirable. Light should be constant or decreasing.
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23What is the Golden Rule of lighting for layers (laying phase)?
A.Never decrease light duration
B.Always decrease light duration
C.Use only blue light
D.Provide varying light daily
Correct Answer: Never decrease light duration
Explanation:
Decreasing light during the laying phase can depress egg production and induce molting. Light should be constant or increasing.
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24What is the standard photoperiod (light duration) required for optimal egg production in layers?
A.12 hours
B.24 hours
C.8-10 hours
D.16-17 hours
Correct Answer: 16-17 hours
Explanation:
Layers generally require 16-17 hours of light per day to stimulate the pituitary gland for optimal egg production.
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25Which of the following describes 'Dubbing' in poultry?
A.Clipping of wings
B.Cutting the beak
C.Removal of the spur
D.Removal of the comb
Correct Answer: Removal of the comb
Explanation:
Dubbing is the surgical removal of the comb (and sometimes wattles), usually done in day-old chicks to prevent injury and frostbite.
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26What is 'Debeaking' or 'Beak Trimming' primarily used to prevent?
A.Feed wastage
B.Cannibalism and feather pecking
C.Loud noises
D.Egg eating only
Correct Answer: Cannibalism and feather pecking
Explanation:
Beak trimming is the most effective method to control cannibalism, feather pecking, and vent pecking in flocks.
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27The calcium content in a Layer ration should be approximately:
A.1.0 - 1.5%
B.8.0 - 10.0%
C.3.0 - 3.5%
D.0.5 - 1.0%
Correct Answer: 3.0 - 3.5%
Explanation:
Layers have a high calcium requirement for eggshell formation. Grower rations have low calcium (~1%), but layer rations need 3.0-3.5%.
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28Which of the following is a characteristic of a 'Good Layer' when examined for culling?
A.Yellow shanks and beak
B.Hard and shrunken comb
C.Large, moist, oval vent
D.Small, dry, pale vent
Correct Answer: Large, moist, oval vent
Explanation:
A laying bird has a dilated, large, oval, and moist vent. A non-layer has a small, dry, and round vent.
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29The bleaching (loss of pigmentation) in yellow-skinned layers occurs in which order?
A.Vent Eye ring Beak Shanks
B.Shanks Beak Vent
C.Hock Comb Vent
D.Random order
Correct Answer: Vent Eye ring Beak Shanks
Explanation:
Pigment fades from body parts with faster circulation first. The order is: Vent, Eye ring, Ear lobe, Beak, and finally Shanks.
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30In a cage system, what is the standard floor space requirement per layer?
A.4.0 sq. ft.
B.0.6 - 0.75 sq. ft.
C.0.2 sq. ft.
D.2.0 sq. ft.
Correct Answer: 0.6 - 0.75 sq. ft.
Explanation:
Cages allow for high stocking density. The standard recommendation is often around 0.6 to 0.75 square feet (approx 60-70 sq inches) per bird.
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31What is 'Phase Feeding' in layer management?
A.Changing feed formulation based on age and production level
B.Feeding solids and liquids in different phases
C.Feeding only during the day phase
D.Feeding only when birds are molting
Correct Answer: Changing feed formulation based on age and production level
Explanation:
Phase feeding adjusts the nutrient density (protein, calcium) of the diet to match the changing requirements of the bird as it progresses through the laying cycle.
The Haugh Unit measures the height of the thick albumen relative to the egg weight. It is the standard measure of internal egg freshness/quality.
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33Vaccination for Marek's Disease is typically administered at what age?
A.Day 1 (at the hatchery)
B.Week 3
C.Point of lay
D.Week 8
Correct Answer: Day 1 (at the hatchery)
Explanation:
Marek's disease vaccine is almost universally given to day-old chicks at the hatchery, often via subcutaneous injection.
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34The ratio of Potassium Permanganate () to Formalin for standard '1X' fumigation is:
A.40 g : 20 ml Formalin
B.100 g : 100 ml Formalin
C.20 g : 40 ml Formalin
D.10 g : 10 ml Formalin
Correct Answer: 20 g : 40 ml Formalin
Explanation:
For 100 cubic feet of space, standard concentration (1X) uses 20 g of Potassium Permanganate and 40 ml of Formalin.
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35A 'Clutch' in poultry terms refers to:
A.The number of eggs laid on consecutive days without a break
B.A group of chicks hatched together
C.A disease symptom
D.The type of feed used
Correct Answer: The number of eggs laid on consecutive days without a break
Explanation:
A clutch is the sequence of eggs laid by a hen on consecutive days before she skips a day.
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36How is Feed Conversion Ratio (FCR) for layers typically calculated?
A.
B.
C.
D. (or Kg egg mass)
Correct Answer: (or Kg egg mass)
Explanation:
FCR in layers is the amount of feed required to produce a unit of output, typically calculated as Kg feed per dozen eggs or Kg feed per Kg egg mass.
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37What is the maximum recommended concentration of Ammonia in a poultry house?
A.500 ppm
B.25 ppm
C.100 ppm
D.5 ppm
Correct Answer: 25 ppm
Explanation:
Ammonia levels exceeding 25 ppm can damage the respiratory tract of birds and reduce performance. Humans can detect it by smell at around 20-25 ppm.
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38In artificial incubation, if the temperature is consistently too high, the result is likely to be:
A.Increased hatchability
B.Late hatching and large chicks
C.Early hatching and smaller/weak chicks
D.No effect
Correct Answer: Early hatching and smaller/weak chicks
Explanation:
High temperatures accelerate metabolic rate, leading to early hatching, but the chicks are often small, weak, and may have unhealed navels.
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39Which nutrient is specifically increased in 'Layer Breeder' rations compared to commercial layer rations to ensure embryo development?
A.Carbohydrates
B.Fiber
C.Manganese, Zinc, and Vitamins (E, B12)
D.Water
Correct Answer: Manganese, Zinc, and Vitamins (E, B12)
Explanation:
Breeder rations require higher levels of trace minerals (Mn, Zn) and vitamins (Riboflavin, E, B12) to ensure hatchability and chick quality, which are not critical for table egg production.
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40What is 'Trap Nesting'?
A.A cage system
B.A type of deep litter material
C.A nest that traps the hen to record individual egg production
D.A method to catch predators
Correct Answer: A nest that traps the hen to record individual egg production
Explanation:
Trap nests are used in breeding programs to determine the pedigree and exact egg production performance of individual hens.
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41The term 'Point of Lay' (POL) usually refers to the age when the flock reaches what percentage of egg production?
A.100%
B.50%
C.5%
D.1%
Correct Answer: 5%
Explanation:
Point of Lay is technically when the first egg is laid, but in flock management, it is often defined as the age when the flock reaches 5% production.
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42What is 'Induced Molting' or 'Forced Molting'?
A.The natural loss of feathers in chicks
B.Removing feathers by machine
C.A disease symptom causing feather loss
D.A management practice to rejuvenate the flock for a second laying cycle
Correct Answer: A management practice to rejuvenate the flock for a second laying cycle
Explanation:
Forced molting involves withdrawing feed/light to stop production, reset the reproductive tract, and extend the productive life of the flock.
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43In the concept of 'Sexing', what is the 'Vent Sexing' method based on?
A.Visual examination of the rudimentary copulatory organ in the cloaca
B.Color of the down feathers
C.DNA testing
D.Length of the primary wing feathers
Correct Answer: Visual examination of the rudimentary copulatory organ in the cloaca
Explanation:
Vent sexing (Japanese method) involves checking the cloaca of day-old chicks to distinguish the male copulatory eminence from the female structure.
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44Feather sexing is possible in day-old chicks if they are:
A.Sex-linked crosses (slow vs fast feathering genes)
B.Fed high protein diet
C.Late feathering strains
D.Purebred Leghorns
Correct Answer: Sex-linked crosses (slow vs fast feathering genes)
Explanation:
Feather sexing relies on sex-linked genes where females have different wing feather lengths (primary/coverts) compared to males at hatching.
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45Which of the following is a cause of 'Starve-out' in brooding?
A.High protein feed
B.Vaccination
C.Feeders placed too high or too far from heat
D.Too much light
Correct Answer: Feeders placed too high or too far from heat
Explanation:
Starve-out occurs when chicks fail to find feed and water in the first few days, often due to improper placement or lack of light near the equipment.
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46What is the standard weight of a large chicken egg?
A.40-45 g
B.30-35 g
C.58-60 g
D.75-80 g
Correct Answer: 58-60 g
Explanation:
The standard market weight for a large chicken egg is approximately 58 to 60 grams (about 2 ounces).
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47The 'Shape Index' of an egg is calculated using:
A.
B.
C.
D.
Correct Answer:
Explanation:
Shape index indicates the shape of the egg. A normal egg has a shape index of about 74.
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48Why are eggs usually gathered frequently (3-4 times a day)?
A.To cool them down immediately
B.To wash them immediately
C.To prevent broodiness and minimize dirty/cracked eggs
D.To count them faster
Correct Answer: To prevent broodiness and minimize dirty/cracked eggs
Explanation:
Frequent gathering reduces the chance of eggs getting soiled, broken by other hens, or the hens becoming broody (sitting on eggs).
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49The critical periods of embryonic mortality during incubation are:
A.Days 10-12
B.Day 1 and Day 21
C.First 3 days and Last 3 days
D.Days 7-14
Correct Answer: First 3 days and Last 3 days
Explanation:
Mortality peaks typically occur early (due to genetic/breeding issues) and late (due to incubation conditions or hatching difficulties).
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50What is the purpose of providing 'Grit' to growers and layers?
A.To treat coccidiosis
B.To aid in grinding feed in the gizzard
C.Source of Vitamin D
D.To color the yolk
Correct Answer: To aid in grinding feed in the gizzard
Explanation:
Grit (insoluble stones) accumulates in the gizzard and acts as a grinding agent to break down coarse feed particles.