How to build a small raft or flotation aid - Test
  • 1. What is the primary goal when building a small raft or flotation aid?
A) Having a comfortable seat
B) Achieving buoyancy and stability
C) Being easily transportable while submerged
D) Looking aesthetically pleasing
  • 2. Which material is generally NOT suitable for providing buoyancy?
A) Inflatable bladders
B) Dry logs
C) Sealed plastic bottles
D) Sand
  • 3. What is the purpose of lashings in raft construction?
A) To repel water
B) To add extra weight
C) To provide decoration
D) To securely bind materials together
  • 4. A stable raft should have a low center of ______.
A) Pressure
B) Mass
C) Buoyancy
D) Gravity
  • 5. What is the best type of knot for lashing logs together?
A) Figure eight knot
B) Overhand knot
C) Square knot or clove hitch
D) Bowline
  • 6. What is a potential danger of using only small, individual flotation devices?
A) They can easily detach or shift
B) They never provide enough lift
C) They are too buoyant
D) They are always too heavy
  • 7. Why is it important to distribute weight evenly on the raft?
A) To look more symmetrical
B) To make it easier to paddle
C) To protect the materials
D) To maintain stability and prevent capsizing
  • 8. What is a good strategy for testing the raft's buoyancy?
A) Gradually adding weight in shallow water
B) Ignoring the test and hoping for the best
C) Throwing rocks on it from a distance
D) Immediately jumping on in deep water
  • 9. Which of these factors most significantly impacts the amount of weight a raft can support?
A) The color of the materials used
B) The volume and buoyancy of the flotation material
C) The length of the lashings
D) The builder's strength
  • 10. What should you do if the raft starts to lean excessively to one side?
A) Jump off immediately
B) Shift your weight to the opposite side
C) Ignore it and hope it corrects itself
D) Start paddling harder on the leaning side
  • 11. What is a good natural material to use for lashing?
A) Loose soil
B) Small pebbles
C) Strong vines or rope
D) Dry leaves
  • 12. If using inflatable items, what is crucial to consider?
A) Their color coordination
B) Leaving them partially deflated
C) Overinflating them for maximum buoyancy
D) Ensuring they are properly sealed and inflated
  • 13. What is a 'sheer lashing' used for?
A) Creating a decorative border
B) Attaching a sail
C) Holding poles or logs side by side
D) Anchoring the raft
  • 14. What consideration is most important when choosing logs?
A) That they have a pleasant smell
B) That they are freshly cut and green
C) That they are dry and lightweight
D) That they are very heavy
  • 15. Why should you avoid using rotten wood?
A) It is difficult to lash
B) It attracts insects
C) It lacks structural integrity and buoyancy
D) It is too heavy
  • 16. What is a disadvantage of using only air-filled items for buoyancy?
A) They are always difficult to inflate
B) They are vulnerable to punctures
C) They are too heavy to carry
D) They are naturally unstable
  • 17. Which safety precaution is most important when using a raft?
A) Wearing a personal flotation device (PFD)
B) Knowing how to swim
C) Having a large supply of food
D) Wearing bright clothing
  • 18. What is the term for the ability of an object to float?
A) Density
B) Gravity
C) Weight
D) Buoyancy
  • 19. How can you increase the stability of a small raft?
A) Make it taller
B) Use more pointed materials
C) Widen the base
D) Reduce the overall size
  • 20. What is a potential hazard when using a raft near a river?
A) Overpopulation of fish
B) Extreme temperatures
C) Lack of sunlight
D) Strong currents and underwater obstacles
  • 21. What is a key factor in choosing a location to build the raft?
A) Proximity to materials and water source
B) A crowded area
C) A very steep hill
D) Far away from the water
  • 22. When using plastic bottles, what is important to ensure?
A) They are tightly sealed with air inside
B) They are all the same color
C) They are filled with water
D) They are crushed
  • 23. What is the best way to protect your feet on a raft?
A) Wrap your feet in leaves
B) Wear socks only
C) Go barefoot for better grip
D) Wear sturdy shoes or sandals
  • 24. What should you do if the lashing starts to loosen?
A) Ignore it and hope it holds
B) Retighten it immediately
C) Cut it off
D) Add more weight to the raft
  • 25. What is an important tool to have for raft building?
A) A pillow
B) A paintbrush
C) A knife or sharp cutting tool
D) A calculator
  • 26. What is the primary purpose of a flotation aid?
A) To provide shelter from the sun
B) To travel long distances
C) To carry heavy cargo
D) To help a person stay afloat in water
  • 27. Which of these is NOT a suitable material for constructing the frame of a small raft?
A) Logs
B) Strong wooden poles
C) Bamboo
D) Flexible branches
  • 28. When choosing a body of water to test your raft, what is the safest option?
A) A shallow, calm area
B) A waterfall
C) The open ocean
D) A fast-flowing river
  • 29. What type of knot is best for creating a loop that won't slip?
A) Square knot
B) Granny knot
C) Overhand knot
D) Bowline
  • 30. Why is it important to remove sharp edges or splinters from the raft's construction?
A) To improve its appearance
B) To reduce its weight
C) To make it more aerodynamic
D) To prevent injuries
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