ASRB NET and ARS / SMS / STO (Agricultural Scientists Recruitment Board) · India · Agricultural Scientists Recruitment Board
Original practice questions written to the published syllabus · not past papersCommercial broiler and layer production, brooding, lighting, hatchery operation, egg quality and biosecurity for chicken, duck, quail and turkey.
In the exams: ICAR AICE-JRF core group 05; ICAR AIEEA-PG 14 (Poultry Science); China comprehensive paper poultry 20; NAVLE poultry 2%; SAVC Paper 2 poultry 15
How our questions for ASRB NET and ARS / SMS / STO spread across the units of Avian and Poultry Production Management. Difficulty: 32 easy, 36 medium, 15 hard.
| Avian physiology | 10 | |
| Poultry breeds and strains | 9 | |
| Broiler management | 9 | |
| Incubation | 8 | |
| Layer management | 7 | |
| Egg quality | 7 | |
| Poultry economics and marketing | 7 | |
| Lighting programmes | 5 | |
| Candling and hatchability | 5 | |
| Brooding | 4 | |
| Hatchery operations | 4 | |
| Biosecurity | 4 | |
| Poultry products technology | 4 |
Choose an answer, then open the working. Each explanation says why the right answer is right and why the others are not.
Fertilisation of the ovum in the hen takes place in the:
C. Infundibulum
The ovum is fertilised in the infundibulum within the short time (about a quarter of an hour) before albumen is added. Once the magnum lays down albumen, sperm cannot reach the germinal disc. Sperm are stored near the vagina but fertilisation does not occur there.
In which part of the oviduct does the forming egg spend about 20 hours?
B. Shell gland (uterus)
The shell gland holds the egg for about 20 hours, adding water and salts to the albumen and then the calcium carbonate shell, pigment and cuticle. The magnum takes about 3 hours and the isthmus a little over an hour.
In the domestic hen, the functional reproductive organs are:
A. The left ovary and left oviduct
Only the left ovary and oviduct develop in the hen; the right regress during embryonic life. This is why a hen has a single oviduct opening into the cloaca.
Where does the hen store sperm that fertilise eggs for days or weeks after a single mating?
C. Sperm-host glands at the utero-vaginal junction
Sperm are held mainly in sperm-host (storage) tubules at the utero-vaginal junction and released gradually to the infundibulum, where fertilisation occurs. Smaller secondary storage in the infundibulum exists, but the main site is the utero-vaginal junction.
20,000 broiler chicks were placed and 900 died or were culled before sale. What is the liveability?
B. 95.5%
Liveability = (placed − dead) ÷ placed × 100 = 19,100 ÷ 20,000 × 100 = 95.5%. 4.5% is the mortality; dividing by survivors gives 4.7%; inverting (placed ÷ survivors) gives 104.7%.
A broiler breeder pullet flock has a mean body weight of 1500 g. Flock uniformity is usually defined as the percentage of birds whose weight lies between:
D. 1,350 and 1,650 g
Uniformity is the percentage of birds within ±10% of the mean: 1500 × 0.9 = 1350 g and 1500 × 1.1 = 1650 g. Many guides aim for 80% or more. ±10 g confuses percent with grams; 1,425–1,575 g is only ±5% and 1,200–1,800 g is ±20%.
The incubation period of the Muscovy duck egg is about:
D. 35 days
Muscovy (Cairina moschata) eggs take about 35 days, clearly longer than common duck eggs (about 28 days). 17–18 days is the Japanese quail.
A fumigation protocol uses formalin and potassium permanganate in the usual ratio of 2 mL formalin to 1 g permanganate. If 60 g of permanganate is used, how much formalin is needed?
C. 120 mL
Formalin = 60 g × 2 mL/g = 120 mL. Halving (30 mL) reverses the ratio; 180 mL multiplies by the whole ratio (2 + 1) instead of the formalin part. Always add formalin to permanganate in a deep container and leave the room at once; formaldehyde is irritant and carcinogenic and restricted in some countries.
During the last days of incubation the chick pips into the air cell and begins breathing air. This event is called:
C. Internal pipping
Internal pipping is when the beak breaks through the inner membrane into the air cell and lung respiration begins. External pipping follows, when the shell itself is broken. Transfer is moving eggs from setter to hatcher; draw-down describes the air cell shape near hatch.
The period for which a cleaned and disinfected poultry house is left empty before restocking is called:
D. Downtime
Downtime is the empty period between flocks after cleaning and disinfection. A withdrawal period applies to medicines before slaughter or egg sale; quarantine isolates new or sick animals.
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