California Boater Card Practice Test 2026：第4套练习测试

California Boater Card Practice Test 练习测试第4套（共6套）：再练25道题，附答案和解释。

船只驾驶
加利福尼亚州
132道题
核对于2026年10月10日

第1题，共25题
What does this white marker with an orange circle mean?
- A controlled area; here, no wake
- Danger from rocks right below
- Boats must keep out of the area
- Directions to a nearby marina
显示答案
答案: A. A controlled area; here, no wake
An orange circle marks a controlled area, such as a no-wake or speed-limit zone. The rule is written inside the circle.
第2题，共25题
Light 4 in the diagram is the white sternlight. How wide is its arc?
- 225 degrees, toward the front
- 360 degrees, all around
- 112.5 degrees, on one side
- 135 degrees, toward the back
显示答案
答案: D. 135 degrees, toward the back
The sternlight shines over 135 degrees behind the boat. The masthead light covers 225 degrees forward.
第3题，共25题
How long should you run the blower before starting a gasoline inboard engine?
- At least 20 minutes
- Only while the engine is cranking
- About 10 seconds
- At least 4 minutes
显示答案
答案: D. At least 4 minutes
Boats with powered blowers carry a warning label: run the blower at least four minutes and check the bilge for gasoline vapors before starting.
第4题，共25题
Which kind of life jacket is the right choice for riding a personal watercraft?
- A non-inflatable life jacket rated for PWC use
- A throwable cushion held on your lap
- No life jacket is needed on a PWC
- An inflatable belt pack
显示答案
答案: A. A non-inflatable life jacket rated for PWC use
Most inflatable life jackets are not approved for PWC use. Wear a properly sized, inherently buoyant life jacket meant for PWC riding.
第5题，共25题
Two vessels agree by VHF radio how they will pass each other. Do they still have to sound whistle signals?
- No, and sounding them would be illegal
- No, but they may
- Yes, always, before and after passing
- Yes, but only at night
显示答案
答案: B. No, but they may
Vessels that reach agreement by radio do not have to sound the whistle signals. If they cannot agree, whistle signals must be exchanged and they prevail.
第6题，共25题
What does this black buoy with a red band and two black balls on top mean?
- The center of a safe channel or fairway
- An isolated danger with safe water around it
- A mooring area where boats may tie up
- The start of a no-wake zone near shore
显示答案
答案: B. An isolated danger with safe water around it
Isolated danger marks are placed on or near a danger, such as a rock, that has navigable water around it. Do not pass close.
第7题，共25题
Which engines must have a Coast Guard-approved backfire flame arrester?
- Diesel engines only
- Gasoline inboard engines
- Electric trolling motors
- All outboard motors
显示答案
答案: B. Gasoline inboard engines
Gasoline engines installed after April 25, 1940, except outboard motors, must have an approved backfire flame control device.
第8题，共25题
Your powerboat is approaching a vessel engaged in fishing with nets. What must you do?
- Keep out of its way
- Sound five short blasts and continue
- Hold your course; it must move for you
- Pass close to look at its gear
显示答案
答案: A. Keep out of its way
A power-driven vessel underway must keep out of the way of a vessel engaged in fishing, which has nets or gear that limit its movement.
第9题，共25题
Who may use an inflatable life jacket to meet the carriage requirement?
- Anyone of any age
- Only people who cannot swim
- People 16 years of age and older
- Children under 13
显示答案
答案: C. People 16 years of age and older
Inflatable life jackets are approved only for people 16 and older.
第10题，共25题
What kind of numbers do red nun buoys like this carry?
- Odd numbers
- Even numbers
- Letters only
- No numbers
显示答案
答案: B. Even numbers
Red lateral markers carry even numbers, and the numbers increase as you head in from sea.
第11题，共25题
A vessel overtaking you on inland waters signals its plan, and you agree. What do you do?
- Turn toward the overtaking boat
- Sound five short blasts
- Do nothing; silence means yes
- Sound the same signal back
显示答案
答案: D. Sound the same signal back
The vessel being overtaken answers with the same signal if it agrees. If it is unsure, it sounds the danger signal of at least five short blasts.
第12题，共25题
A 30-foot boat with an engine room must post which placard?
- An oil discharge placard, at least 5 by 8 inches
- A speed limit sign for the nearest marina
- A placard listing the names of the crew
- A no-smoking sign, at least 2 by 3 inches
显示答案
答案: A. An oil discharge placard, at least 5 by 8 inches
Boats 26 feet or longer with a machinery space must post an oil discharge placard at least 5 by 8 inches in the machinery space or at the bilge pump station.
第13题，共25题
You are towing a water-skier. What is the job of the observer on board?
- Steer the skier using only hand signals
- Keep other boats from coming close to watch
- Watch the skier and tell the operator what happens
- Drive the boat while the operator watches
显示答案
答案: C. Watch the skier and tell the operator what happens
The operator must watch where the boat is going, so a second person keeps a continuous eye on the skier and reports falls and signals.
第14题，共25题
Where can you legally throw plastic overboard?
- More than 12 miles from shore
- Nowhere
- More than 3 miles from shore
- Only in rivers
显示答案
答案: B. Nowhere
Discharging plastic into the water is prohibited everywhere.
第15题，共25题
Which non-pyrotechnic signal counts for nighttime use only?
- A red pennant
- An orange smoke signal
- An electric distress light
- An orange distress flag
显示答案
答案: C. An electric distress light
An electric distress light meets the night requirement. An orange flag only counts during the day.
第16题，共25题
How tall must the letters and numbers of the registration number be?
- At least 12 inches, in any color
- At least 6 inches, in script letters
- At least 3 inches, in block characters
- At least 1 inch, in any style
显示答案
答案: C. At least 3 inches, in block characters
The registration number must be in plain block characters at least 3 inches high, in a color that contrasts with the hull.
第17题，共25题
Your state has a different child life jacket age than the federal rule. Which rule applies on that state's waters?
- The federal rule always
- The state rule
- Whichever age is higher
- Neither; you may choose
显示答案
答案: B. The state rule
Where a state sets its own child life jacket requirement, the state rule applies on waters under that state's jurisdiction.
第18题，共25题
How often should you inspect your fire extinguishers?
- Every 5 years
- Monthly
- Never, if the seal is intact
- Only after a fire
显示答案
答案: B. Monthly
Inspect extinguishers monthly. If the label lists a minimum weight, weigh them once a year.
第19题，共25题
A friend lifts your life jacket at the shoulders and it stays below your chin. What does this show?
- It fits properly
- It is the wrong color
- It is too loose
- It needs to be inflated
显示答案
答案: A. It fits properly
A properly fitted life jacket stays in place when lifted at the shoulders. If it rides up over your chin or ears, it is too loose.
第20题，共25题
You are leaving a harbor and heading out to sea. Where should red buoys like this be?
- On your port (left) side
- In the middle of your path
- It does not matter
- On your starboard (right) side
显示答案
答案: A. On your port (left) side
Red is kept on the right when returning, so when heading out to sea the red markers are on your left.
第21题，共25题
On inland waters, a power-driven vessel meeting you sounds one short blast. What does it mean?
- "I am operating astern propulsion"
- "I am in distress"
- "I intend to leave you on my port side"
- "I intend to leave you on my starboard side"
显示答案
答案: C. "I intend to leave you on my port side"
Under Inland Rule 34, one short blast means "I intend to leave you on my port side". If you agree, answer with one short blast.
第22题，共25题
Where must recreational boats carry visual distress signals?
- Coastal waters, the Great Lakes and territorial seas
- Only on rivers that are wider than 1 mile
- Only on small inland lakes and ponds
- Only within 1 mile of any shoreline
显示答案
答案: A. Coastal waters, the Great Lakes and territorial seas
Visual distress signals are required on U.S. coastal waters, the Great Lakes, territorial seas, and connected waters up to where they become less than 2 nautical miles wide.
第23题，共25题
What does an engine cut-off switch link do?
- Stops the engine if the operator is thrown from the helm
- Locks the steering wheel when you are not aboard
- Turns on the navigation lights automatically
- Starts the bilge blower before the engine starts
显示答案
答案: A. Stops the engine if the operator is thrown from the helm
The lanyard links the operator to the switch. If the operator is thrown from the helm, the link pulls free and the engine shuts off.
第24题，共25题
How should the registration number be separated into groups?
- It must be written as one long group
- With a slash between letters and numbers
- With a hyphen or a space the width of one letter
- With periods between each character
显示答案
答案: C. With a hyphen or a space the width of one letter
Spaces or hyphens equal to the width of a letter (other than I) or number (other than 1) separate the groups.
第25题，共25题
You row a small rowboat after dark. What light do you need?
- A flashing blue light on the stern
- A white flashlight or lantern, ready to show
- No light, because it has no motor
- A red light mounted on the bow
显示答案
答案: B. A white flashlight or lantern, ready to show
Vessels under oars may show sailing vessel lights, or must have a white flashlight or lantern ready to show.

相关测试