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