The correct answer is A. air only
If the engine is not well maintained it will produce soot to the air, polluting the air.
sharon kalunda answered the question on July 30, 2019 at 12:38
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Which one of the following pairs of materials are good conductors of electricity?
(Solved)
Which one of the following pairs of materials are good conductors of electricity?
A. Steel wool and glass.
B. Coin and chalk.
C. Pins and dry wood.
D. Aluminium foil and razor blade.
Date posted:
July 30, 2019
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Answers (1)
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The percentage of the component of air in the atmosphere used by legumes to make proteins is
(Solved)
The percentage of the component of air in the atmosphere used by legumes to make proteins is
A. 78%
B. 21%
C. 0.97%
D. 0.03%.
Date posted:
July 30, 2019
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Answers (1)
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The first step in obtaining salt from a mixture of salt solution and pieces of copper wire is
(Solved)
The first step in obtaining salt from a mixture of salt solution and pieces of copper wire is
A. Filtering
B. Winnowing
C. Using a magnet
D. Evaporating to dryness.
Date posted:
July 30, 2019
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Answers (1)
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The reason why improved jikos have a clay lining is to
(Solved)
The reason why improved jikos have a clay lining is to
A. Reduce the amount of heat loss
B. Reduce the space for charcoal
C. Make charcoal light faster
D. Make the jiko last longer.
Date posted:
July 30, 2019
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Answers (1)
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Which of the following factors makes wax to float on water?
(Solved)
Which of the following factors makes wax to float on water?
A. Shape of material.
B. Type of material.
C. Size of material.
D. Mass of material.
Date posted:
July 30, 2019
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Answers (1)
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The pie chart below shows proportions of G, H. J and K that represent the components of air.
Which proportion CORRECTLY represents a gas used...
(Solved)
The pie chart below shows proportions of G, H. J and K that represent the components of air.
Which proportion CORRECTLY represents a gas used in fire extinguishers and a gas used in an electric tube? Used in fire extinguisher------------------------------------ used in electric tube
A. K------------------------------------------------------------ H
B. G -------------------------------------------------------------K
C. J------------------------------------------------------------- H
D. G------------------------------------------------------------- J
Date posted:
July 30, 2019
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Answers (1)
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The diagram below represents the processes I, II. III and V that are involved in change of states of matter. Which of the following CORRECTLY...
(Solved)
The diagram below represents the processes I, II. III and V that are involved in change of states of matter.
Which of the following CORRECTLY represents the processes?
I--------------- II------------------ III------------------------------- IV
A. Melting ---------Freezing -------------Evaporation---------------------- Condensation
B. Condensation ------Evaporation -----------Melting------------------------ Freezing.
C. Evaporation ----------Melting -------------Freezing----------------------- Condensation.
D. Melting--------------- Freezing ------------Condensation --------------------Evaporation.
Date posted:
July 30, 2019
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Answers (1)
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Which of the following pairs of plants is CORRECTLY matched with the type of root system
(Solved)
Which of the following pairs of plants is CORRECTLY matched with the type of root system
Tap root------------------------ Fibrous root
A. Grass ----------------------------wheat
B. Tomato --------------------------black jack
C. Coconut -------------------------acacia
D. Kale -----------------------------onion
Date posted:
July 30, 2019
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Answers (1)
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A plant which has deep and widely spread root system is LIKELY to have
(Solved)
A plant which has deep and widely spread root system is LIKELY to have
A. Broad leaves
B. Many leaves
C. Succulent stems
D. Weak stems.
Date posted:
July 30, 2019
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Answers (1)
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A pupil was blindfolded and asked to listen as a bell was rang from different positions. Which aspect of sound was being investigated?
(Solved)
A pupil was blindfolded and asked to listen as a bell was rang from different positions. Which aspect of sound was being investigated?
A. Direction of sound.
B. Effects of sound pollution.
C. Loud and soft sounds.
D. Meaning of special sounds
Date posted:
July 30, 2019
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Answers (1)
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The main reason why murram is placed on roads is to
(Solved)
The main reason why murram is placed on roads is to
A. absorb rain water
B. make the roads last longer
C. increase grip with tyres
D. make the roads more attractive.
Date posted:
July 30, 2019
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Answers (1)
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The following are reasons for fitting a tap near the bottom of a tank except
(Solved)
The following are reasons for fitting a tap near the bottom of a tank except
A. making gravitational force to act on water
B. making water to flow faster
C. to increase pressure
D. to let all the water out.
Date posted:
July 30, 2019
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Answers (1)
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Which of the following groups of foods would provide nutrients suitable for a child suffering from kwashiorkor?
(Solved)
Which of the following groups of foods would provide nutrients suitable for a child suffering from kwashiorkor?
A. Sorghum, carrots, sweet potatoes.
B. Oranges, Irish potatoes, sugar cane.
C. Beef, peas, milk.
D. Mangoes, arrow roots, spinach.
Date posted:
July 30, 2019
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Answers (1)
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Which of the following groups of animal feeds mainly provides a diet of proteins, carbohydrates and Fats respectively?
(Solved)
Which of the following groups of animal feeds mainly provides a diet of proteins, carbohydrates and Fats respectively?
A. Desmodium, clover, sweet potato vines.
B. Lucem, maize stalks, oats.
C. Napier grass, sweet potato vines, maize stalks.
D. Lucem, desmodium, napier grass.
Date posted:
July 30, 2019
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Answers (1)
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The diagram below represents a simple electromagnet.
Which of the following energy transformations occur in the electromagnet?
(Solved)
The diagram below represents a simple electromagnet.
Which of the following energy transformations occur in the electromagnet?
A. Electrical —> Magnetic —> Chemical.
B. Chemical —> Magnetic —> Electrical.
C. Chemical---->Electrical----->Magnetic.
D. Magnetic A Chemical —> Electrical.
Date posted:
July 30, 2019
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Answers (1)
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In which of the following pairs of levers is the load, effort and fulcrum likely to be in similar positions when in use?
(Solved)
In which of the following pairs of levers is the load, effort and fulcrum likely to be in similar positions when in use?
A. Crowbar and claw hammer.
B. Wheelbarrow and spade.
C. Crowbar and spade.
D. Claw hammer and wheelbarrow.
Date posted:
July 29, 2019
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Answers (1)
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A farmer practicing stall feeding is likely to feed animals on
(Solved)
A farmer practicing stall feeding is likely to feed animals on
A. Pasture and fodder
B. Pasture and concentrates
C. Fodder and concentrates
D. Concentrates only.
Date posted:
July 29, 2019
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Answers (1)
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Soil that is good for modelling has
(Solved)
Soil that is good for modelling has
A. High water drainage
B. Rough texture
C. High capillarity
D. Large air spaces.
Date posted:
July 29, 2019
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Answers (1)
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Which of the following pairs of processes occurs when temperature decreases?
(Solved)
Which of the following pairs of processes occurs when temperature decreases?
A. Melting and condensation.
B. Freezing and melting.
C. Contraction and evaporation.
D. Freezing and condensation.
Date posted:
July 29, 2019
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Answers (1)
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The set up shown below can be used to investigate the presence of a certain component of soil.
The soil component investigated is
(Solved)
The set up shown below can be used to investigate the presence of a certain component of soil.
The soil component investigated is
A. organic matter
B. water
C. air
D. mineral salts.
Date posted:
July 29, 2019
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Answers (1)