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) Dry logs
B) Sealed plastic bottles
C) Inflatable bladders
D) Sand
  • 3. What is the purpose of lashings in raft construction?
A) To repel water
B) To add extra weight
C) To securely bind materials together
D) To provide decoration
  • 4. A stable raft should have a low center of ______.
A) Mass
B) Gravity
C) Buoyancy
D) Pressure
  • 5. What is the best type of knot for lashing logs together?
A) Figure eight knot
B) Bowline
C) Square knot or clove hitch
D) Overhand knot
  • 6. What is a potential danger of using only small, individual flotation devices?
A) They never provide enough lift
B) They can easily detach or shift
C) They are always too heavy
D) They are too buoyant
  • 7. Why is it important to distribute weight evenly on the raft?
A) To protect the materials
B) To maintain stability and prevent capsizing
C) To make it easier to paddle
D) To look more symmetrical
  • 8. What is a good strategy for testing the raft's buoyancy?
A) Ignoring the test and hoping for the best
B) Throwing rocks on it from a distance
C) Immediately jumping on in deep water
D) Gradually adding weight in shallow water
  • 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 color of the materials used
D) The volume and buoyancy of the flotation material
  • 10. What should you do if the raft starts to lean excessively to one side?
A) Ignore it and hope it corrects itself
B) Shift your weight to the opposite side
C) Start paddling harder on the leaning side
D) Jump off immediately
  • 11. What is a good natural material to use for lashing?
A) Loose soil
B) Small pebbles
C) Dry leaves
D) Strong vines or rope
  • 12. If using inflatable items, what is crucial to consider?
A) Ensuring they are properly sealed and inflated
B) Leaving them partially deflated
C) Their color coordination
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) Attaching a sail
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 very heavy
D) That they are dry and lightweight
  • 15. Why should you avoid using rotten wood?
A) It lacks structural integrity and buoyancy
B) It is too heavy
C) It attracts insects
D) It is difficult to lash
  • 16. What is a disadvantage of using only air-filled items for buoyancy?
A) They are always difficult to inflate
B) They are naturally unstable
C) They are vulnerable to punctures
D) They are too heavy to carry
  • 17. Which safety precaution is most important when using a raft?
A) Having a large supply of food
B) Wearing a personal flotation device (PFD)
C) Knowing how to swim
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) Use more pointed materials
B) Reduce the overall size
C) Make it taller
D) Widen the base
  • 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) Far away from the water
D) A very steep hill
  • 22. When using plastic bottles, what is important to ensure?
A) They are filled with water
B) They are tightly sealed with air inside
C) They are all the same color
D) They are crushed
  • 23. What is the best way to protect your feet on a raft?
A) Wear sturdy shoes or sandals
B) Go barefoot for better grip
C) Wrap your feet in leaves
D) Wear socks only
  • 24. What should you do if the lashing starts to loosen?
A) Cut it off
B) Retighten it immediately
C) Add more weight to the raft
D) Ignore it and hope it holds
  • 25. What is an important tool to have for raft building?
A) A pillow
B) A calculator
C) A knife or sharp cutting tool
D) A paintbrush
  • 26. What is the primary purpose of a flotation aid?
A) To provide shelter from the sun
B) To carry heavy cargo
C) To travel long distances
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) Strong wooden poles
B) Logs
C) Flexible branches
D) Bamboo
  • 28. When choosing a body of water to test your raft, what is the safest option?
A) A shallow, calm area
B) The open ocean
C) A waterfall
D) A fast-flowing river
  • 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 improve its appearance
B) To prevent injuries
C) To reduce its weight
D) To make it more aerodynamic
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