2021 NECO Economics Past Questions

A transformer supplies 12V when connected to a 240V mains. If the transformer takes 0.120A from the mains when used to light a 12V, 24W lamp, what is its efficiency?

1. A.57.20%
2. B.66.60%
3. C.83.30%✓ Correct
4. D.92.50%
5. E.100%

When dust particles collide randomly in a beam of Sunlight, the phenomenon observed is known as

1. A.Brownian movement.
2. B.Dialysis✓ Correct
3. C.Diffusion
4. D.Osmosis
5. E.Tyndall effect

Find the arithmetic mean of the following set of scores 12, 4, 2, 8, and 14

1. A.A. 8
2. B.B. 10
3. C.C. 12
4. D.D. 14✓ Correct
5. E.E. 30

We can improve computer security by the use of?

1. A.A.  account number
2. B.B. ID number✓ Correct
3. C.C. layout
4. D.D. password
5. E.E. user names

Which disease is caused by a virus?

1. A.Cholera
2. B.Measles✓ Correct
3. C.Tetanus
4. D.Typhoid
5. E.Tuberculosis

The practice of growing more than one type of crop on the same plot of land is called

1. A.continuous cropping
2. B.crop rotation
3. C.mixed cropping
4. D.mixed farming✓ Correct
5. E.subsistence farming

A system of government by few privilege and powerful people is called

1. A.A. communism
2. B.B. democracy
3. C.C. oligarchy✓ Correct
4. D.D. socialism
5. E.E. totalitarianism

An electric iron rated 250 V has a coil of resistance 125Ω. What is the cost of using it for I hour at 10k per kWh?

1. A.1.25k✓ Correct
2. B.2.50k
3. C.5.00k
4. D.10.00k
5. E.20.00k

The process through which excess amino acids in the body are broken down into urea and a carbohydrate is called

1. A.deamination
2. B.denaturation
3. C.detoxication✓ Correct
4. D.emulsification
5. E.excretion

Which ballof system was used during the 1999 presidential election in Nigeria?

1. A.A. Compulsory
2. B.B. Open
3. C.C. Open Secret✓ Correct
4. D.D. Proxy
5. E.E. Secret