WAEC Agricultural Science Past Questions & Answers - Page 4

16.

Which of the following pairs of livestock diseases could be contracted through inhalation?

A.

Coccidiosis and rinderpest

B.

Newcastle disease and aspergillosis

C.

Anthrax and tuberculosis

D.

Gumboro and brucellosis

Correct answer is B

Newcastle disease and aspergillosis are livestock diseases that can be contracted through inhalation of infectious agents.

17.

Which of the following statements about underground drainage is true

A.

Ditches are constructed to remove excess water

B.

Ditches are dug from a source of water to the farmland

C.

Furrows are constructed to direct water out of the farmland

D.

Water seeps into tiles to reach an outlet where it is discharged

Correct answer is D

In this drainage system, perforated pipes or tiles are placed underground at a certain depth, usually below the root zone of the crops. These pipes or tiles have small holes or perforations that allow water to seep into them from the surrounding soil. As the water table rises due to excess moisture in the soil, the water seeps into these pipes through the perforations.

18.

Grading of farm produce is important because it

A.

Maintains produce quality

B.

Prolongs storability

C.

Facilitates pricing

D.

Facilitates transportation

Correct answer is C

Grading allows farm produce to be classified into different grades based on their quality attributes. Each grade can then be assigned a specific price point, reflecting its quality and market demand. This transparent pricing system benefits both producers and consumers.

19.

The part of a disc plough to which discs are connected is

A.

Furrow wheel

B.

Standard

C.

Scraper

D.

Beam

Correct answer is B

The standard is the part of the plough that holds the disc and allows it to rotate. It is the main support structure for the disc.

20.

The number of teats in the udder of a cow is

A.

Four

B.

Two

C.

Six

D.

Eight

Correct answer is A

The udder of a cow consists of four separate compartments, each corresponding to one teat. Each teat serves as an outlet for the milk produced in the corresponding compartment of the udder.