Boater Safety Exam Practice (US) 2026：第4套练习测试

Boater Safety Exam Practice (US) 练习测试第4套（共5套）：再练25道题，附答案和解释。

船只驾驶
美国
120道题
核对于2026年10月10日

第1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2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3题，共25题
Which compartments need a powered exhaust blower?
- Only compartments used to store life jackets and lines
- Those with a gasoline engine that has a remote-start motor
- Every compartment on every boat, of any kind
- Only cabins that have a toilet or a sink
显示答案
答案: B. Those with a gasoline engine that has a remote-start motor
A powered blower is required for compartments with a permanently installed gasoline engine that has a cranking motor for remote starting.
第4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5题，共25题
What sound-producing device must a boat under 12 meters (39.4 feet) carry?
- A bell and a gong mounted on deck
- A siren, like those used on police boats
- Nothing; shouting loudly is enough
- An efficient sound device, such as a horn or whistle
显示答案
答案: D. An efficient sound device, such as a horn or whistle
Boats under 12 meters must carry an efficient sound-producing device, such as a hand-held air horn or a whistle. A human voice is not acceptable.
第6题，共25题
What must a boat 12 meters (39.4 feet) or longer carry for sound signals?
- A referee whistle for the operator
- A small hand bell kept at the helm
- A whistle audible for 1/2 nautical mile
- Nothing beyond a working VHF radio
显示答案
答案: C. A whistle audible for 1/2 nautical mile
Vessels 12 meters or longer need a whistle (horn) audible for 1/2 nautical mile. Vessels 20 meters or longer also need a bell.
第7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8题，共25题
If you use pyrotechnic signals to meet the requirement, how many must you carry?
- Six signals for night use only
- Three for day use and three for night use
- Ten signals of any type, day or night
- One for day use and one for night use
显示答案
答案: B. Three for day use and three for night use
Carry at least three day and three night signals. Combination day/night flares can count toward both.
第9题，共25题
Your flares expired last year. Do they count toward the requirement?
- Yes, for up to 5 years after expiry
- Yes, if they are kept dry
- No, expired pyrotechnics do not count
- Yes, but only at night
显示答案
答案: C. No, expired pyrotechnics do not count
Pyrotechnic signals must be in date. Expired signals do not meet the requirement.
第10题，共25题
Which non-pyrotechnic signal counts for daytime use only?
- An orange distress flag, 3 by 3 feet
- A white all-round anchor light
- An electric distress light
- A green flashlight, held up high
显示答案
答案: A. An orange distress flag, 3 by 3 feet
An orange distress flag is a day signal. An electric distress light is a night signal.
第11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12题，共25题
Your boat is 14 feet long and you are on coastal waters. Which visual distress signals are required?
- Day and night signals at all times on the water
- No signals at any time, because it is under 16 feet
- Day signals only, when out between sunrise and sunset
- Night signals, when out between sunset and sunrise
显示答案
答案: D. Night signals, when out between sunset and sunrise
Boats under 16 feet are exempt from day signal requirements but must carry night signals when operating from sunset to sunrise.
第13题，共25题
Which vessels are exempt from carrying day visual distress signals?
- Any boat that has a working VHF radio
- Boats with inboard gasoline engines
- Manually propelled boats, such as canoes
- All boats over 26 feet with a cabin
显示答案
答案: C. Manually propelled boats, such as canoes
Manually propelled boats, boats under 16 feet, open sailboats under 26 feet without propulsion, and boats in organized events are exempt from day signals.
第14题，共25题
Under federal law, at what blood alcohol concentration is a recreational boat operator considered intoxicated?
- 0.12 or higher
- 0.02 or higher
- 0.08 or higher
- 0.15 or higher
显示答案
答案: C. 0.08 or higher
Operating a vessel with a blood alcohol concentration of 0.08 or higher is a federal violation. States also have their own BUI laws.
第15题，共25题
What is the maximum federal criminal penalty for boating under the influence?
- A written warning, with no fine
- Up to $5,000, one year in prison, or both
- Loss of your car driver license only
- A fine of up to $50 and a short class
显示答案
答案: B. Up to $5,000, one year in prison, or both
Federal BUI penalties include a civil penalty of up to $1,000, or a criminal penalty of up to $5,000, one year in prison, or both.
第16题，共25题
Which boating accident must be reported to the state?
- One where someone needs more than first aid
- A scratch to the hull that costs $100 to fix
- Any time a fishing line breaks on a snag
- Any time a boat runs out of fuel on the water
显示答案
答案: A. One where someone needs more than first aid
A report is required for a death, a disappearance, an injury needing more than first aid, damage of $2,000 or more, or the complete loss of a boat.
第17题，共25题
What amount of property damage makes a boating accident reportable?
- $2,000 or more
- $10,000 or more
- $500 or more
- $200 or more
显示答案
答案: A. $2,000 or more
Accidents with damage to vessels and other property totaling $2,000 or more must be reported.
第18题，共25题
Someone is injured and needs medical treatment beyond first aid. How soon must the written report be filed?
- Within 10 days
- Within 48 hours
- Within 30 days
- Within one year
显示答案
答案: B. Within 48 hours
Reports are due within 48 hours for a death within 24 hours, an injury beyond first aid, or a disappearance. Other reportable accidents must be reported within 10 days.
第19题，共25题
A collision causes $3,000 in damage but no injuries. How soon must it be reported?
- Within 10 days
- It does not need to be reported
- Within 2 hours
- Within 48 hours
显示答案
答案: A. Within 10 days
Accidents with damage only (of $2,000 or more) must be reported within 10 days.
第20题，共25题
After a boating accident, what must the operator do?
- Stop, help if safe, and give name, address and boat ID
- Wait for the other boat to call for help first
- Leave quickly so the area is clear for rescuers
- Only call a tow company to move the boats
显示答案
答案: A. Stop, help if safe, and give name, address and boat ID
Federal law requires an operator involved in a casualty to give assistance as far as possible without serious danger, and to give their name, address and vessel identification.
第21题，共25题
A person goes missing from your boat. Who must you notify right away?
- The nearest state boating authority
- The company that built your boat
- Nobody until the written report is due
- Your insurance company only
显示答案
答案: A. The nearest state boating authority
For a death or a missing person, notify the nearest state boating authority immediately, then file the written report.
第22题，共25题
When must the operator of a covered boat use the engine cut-off switch link?
- Only when towing a skier or a tube
- When on plane or above displacement speed
- Only when docking at a marina or ramp
- Only when operating after dark
显示答案
答案: B. When on plane or above displacement speed
Since April 1, 2021, operators of covered boats must use the engine cut-off switch link when running on plane or above displacement speed.
第23题，共25题
Which boats are covered by the federal engine cut-off switch law?
- Only sailboats that have an outboard motor
- Only commercial fishing boats of any size
- Recreational boats under 26 feet, about 3 hp or more
- All recreational boats over 40 feet long
显示答案
答案: C. Recreational boats under 26 feet, about 3 hp or more
The law covers recreational vessels under 26 feet with engines that make 115 pounds of static thrust (about 3 hp) or more.
第24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25题，共25题
When is an operator NOT required to use the engine cut-off switch link?
- When there are passengers on board
- When the water is calm
- When the main helm is inside an enclosed cabin
- When the boat is going faster than 20 mph
显示答案
答案: C. When the main helm is inside an enclosed cabin
The requirement does not apply when the main helm is inside an enclosed cabin. It is also not needed at slow speeds such as docking or trolling.

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