Pre-Technical Studies Questions and Answers - Grade 7 Opener Exams Term 2 2023 Set 1

SECTION A: Answer all questions in this section.

1. Below are protective equipments against different potential hazards during different tasks. Which one of them is needed for protection against falling objects?
   
2. Below is a learner heating a chemical in a test tube
   
   What would be the best way to keep off the potential hazard in tune with the activity above?
   
   1. Using a plastic test tube.
   2. Putting out the flame.
   3. Performing the task with closed eyes.
   4. Using gloves to heat the chemical. 
3. Which of the following pairs is made up of ferrous metals only?
   
   1. Steel and silver.
   2. Steel and iron. 
   3. Iron and zinc.
   4. Aluminium and brass.
4. All the following are examples of synthetic non- metallic materials. Which one is not?
   
   1. Feathers.
   2. Acrylic.
   3. Polyester.
   4. Nylon.
5. Which one of the following careers is metal work oriented?
   
   1. Lumbering.
   2. Masonry.
   3. Basketry.
   4. Welding.
6. All non-ferrous metals
   1. are poor conductors of heat.
   2. are magnetic.
   3. do not contain iron.
   4. are brittle.
7. Which one of the following is not a function of alluminium? Used to make
   
   1. roofing sheets.
   2. cooking pots.
   3. foils.
   4. packaging cans.
8. Grade 7 learners in Makutano Junior Secondary School made a set the one shown below.
   
   What were the learners investigating?
   
   1. Expansion rates of different types of metals.
   2. The rates of conduction in metals.
   3. The intensity of candle heat on different metal types.
   4. The use of vaseline in conduction.
9. What was the use of vaseline in the experiment above? To
   
   1. hold the rods in place.
   2. make the stand firm.
   3. to melt at different intervals and release the pins.
   4. make the candle light brighter.
10. All the following metals are magnetic. Which one is not?
    1. Iron
    2. Tin
    3. Steel
    4. Copper 
11. All the following types of metals are alloys. Which one exists in its pure form?
    
    1. Bronze
    2. Steel
    3. Magnesium
    4. Brass
12. Mwangi listed the following characteristics of metals:
    1. Yellow in colour.
       
    2. Shiny white in colour.
       
    3. Rusts when exposed to water and air. 
    4. Blue- white in colour.
       Which pair of characteristics is in tune with iron?
       1. i, iii
       2. ii, iv
       3. i, iv
       4. iii, ii
13. Which of the following items is metallic? 
    
14. A person whose job is making and repairing wooden objects is called a ______________________
    1. mason.
    2. welder.
    3. blacksmith.
    4. carpenter.
15. All the following physical properties can be used to describe metals. Which one cannot?
    
    1. Colour.
    2. Fire resistance.
    3. Smell.
    4. Texture.
16. Which one of the following is not a characteristic of metals?
    
    1. Dullness.
    2. Ductility.
    3. Lustrousness.
    4. Malleability.
17. When the skin is exposed to hot steam, the person may suffer a
    
    1. fracture.
    2. scald.
    3. shock.
    4. cut.
18. The following are first aid requirements for a certain type of injury:
    
    1. Put pressure on the injury using a gauze pad.
       
    2. Rinse the injury under cool running water.
       
    3. Clean the injury with a disinfectant. 
    4. Cover the injury with a bandage.
       The first aid requirements listed above correspond with a
       
       1. burn.
       2. cut.
       3. scald.
       4. bruise.
19. The picture below shows a casualty.
    
    What is the purpose of the material marked P? To
    
    1. minimise the movement of the injured hand.
    2. make the injury heal faster.
    3. reduce the rate of swelling.
    4. protect the injured hand from germs.
20. Running on wet and slippery floors can lead to
    
    1. fainting.
    2. shocks.
    3. slides.
    4. death.

SECTION B: Answer all the questions in the spaces provided.

21. Study the picture below.
    
    Which type of injury can the activity above cause?
22. Officers who inspect and examine buildings to detect fire hazards are called ___________________
23. When mopping a cemented floor, why is it important to keep it dry?
24. Below is an equipment used for various activities in the society.
    
    State one safety rule to be followed when using the equipment above.
25. How can you observe safety when cleaning a knife?

MARKING SCHEME

SECTION A

1. B
2. D
3. B
4. A
5. D
6. C
7. A
8. B
9. C
10. D
11. C
12. A
13. B
14. D
15. C
16. A
17. B
18. B
19. A
20. C

SECTION B

21. Dislocation
22. Fire inspectors
23. To avoid slides
24. Do not overload it
25. Do not clean it together with other utensils