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