CSLB General Building (B) Trade Practice Test

Câu hỏi luyện tập mẫu

Một vài câu hỏi thực tế từ ngân hàng miễn phí này, kèm giải thích đầy đủ. Dùng công cụ luyện tập ở trên cho toàn bộ.

1. 1. Bulk Liquids & Surge

   What is 'liquid surge' in a tank vehicle?

   • a.The buildup of vapor pressure inside a sealed tank
   • b.The wave action of liquid that moves back and forth when the vehicle changes speed
   • c.The foaming of liquid caused by rough road surfaces
   • d.The leakage of liquid past a faulty valve

   Đáp án: b

   Giải thích: Liquid surge is the movement of liquid in partially filled tanks. When the driver brakes, the liquid surges forward and can push the truck ahead, then rock it backward. This wave action can strongly affect vehicle handling and control.

2. 2. Bulk Liquids & Surge

   How does a tank vehicle's high center of gravity affect driving?

   • a.It makes the vehicle more likely to roll over
   • b.It improves braking on wet roads
   • c.It lowers the risk of rollover
   • d.It has no effect on a loaded tank

   Đáp án: a

   Giải thích: Tank vehicles have a high center of gravity, meaning much of the weight is carried high off the road. This makes the vehicle top-heavy and easy to roll over. Liquid surge combined with a high center of gravity makes tankers especially prone to tipping in curves and sudden maneuvers.

3. 3. Bulk Liquids & Surge

   Three factors determine how much liquid you can safely load into a tank. Which set is correct?

   • a.Road grade, tire pressure, and axle count
   • b.The amount the liquid will expand, the liquid's weight, and legal weight limits
   • c.Ambient temperature, engine size, and brake type
   • d.Trailer length, hitch rating, and fuel level

   Đáp án: b

   Giải thích: You must consider how much the liquid will expand in transit, the weight of the liquid, and the legal weight limits. A dense liquid may reach the weight limit before the tank is full. Outage must be left for expansion regardless of how heavy the product is.

4. 4. Bulk Liquids & Surge

   On a smooth bore tanker, when is liquid surge typically the strongest?

   • a.When starting and stopping, because nothing slows the forward-back movement
   • b.Only when the tank is completely full
   • c.When driving at a steady speed on a straight road
   • d.When the parking brake is set

   Đáp án: a

   Giải thích: Smooth bore tanks have no baffles, so the liquid surges freely forward and back when speed changes. Starting and stopping produce the strongest surge in these tanks. This is why smooth bore tanks demand smooth, gradual speed changes and extra following distance.

5. 5. Inspection

   When inspecting a tank vehicle, why is checking for leaks especially important?

   • a.Because tanks never need weight checks
   • b.Because leaks are only a problem after unloading
   • c.Because leaking cargo can be hazardous and signals a serious defect
   • d.Because tank inspections are optional for food products

   Đáp án: c

   Giải thích: Tank vehicles have special inspection needs, and checking for leaks is one of the most important. A leak may indicate a defect that could be dangerous, especially with hazardous cargo. Any leaking tank should be taken out of service until repaired.

6. 6. Inspection

   When inspecting the piping, hoses, and connections on a tank, what are you looking for?

   • a.Leaks, damage, and loose or missing fittings
   • b.The manufacturer's logo
   • c.The correct shade of paint
   • d.Whether they can be removed while driving

   Đáp án: a

   Giải thích: Piping, hoses, and connections must be checked for leaks, cracks, wear, and secure fittings. Loose or damaged connections can leak cargo during transport or unloading. All valves and caps should be properly closed and secured before the trip.

7. 7. Inspection

   Because a loaded tank places heavy stress on the suspension, what should you inspect?

   • a.The windshield wipers only
   • b.The cab's interior lights
   • c.Springs, air bags, and other suspension components for damage or wear
   • d.The company logo decals

   Đáp án: c

   Giải thích: Heavy tank loads stress the suspension, so you should inspect springs, air suspension bags, hangers, and related parts. Cracked or worn suspension components can fail under load and cause loss of control. A thorough suspension check is especially important on heavy tank vehicles.

8. 8. Driving Safely

   What is the main reason tank vehicles roll over more easily than other trucks?

   • a.Their high center of gravity combined with liquid surge
   • b.Their extra-wide tires
   • c.Their low ground clearance
   • d.Their light overall weight

   Đáp án: a

   Giải thích: Tank vehicles carry weight high off the ground and the liquid inside can surge and shift. This high center of gravity plus surging cargo makes them easy to tip in curves and sudden maneuvers. Driving slowly and smoothly is the best defense against rollover.

9. 9. Driving Safely

   Why is it dangerous to brake hard while going around a curve in a tanker?

   • a.It uses too much fuel
   • b.It is illegal in all states
   • c.It can cause a skid or rollover due to combined forces on the top-heavy vehicle
   • d.It makes the liquid freeze

   Đáp án: c

   Giải thích: Hard braking in a curve combines braking force, cornering force, and liquid surge on an already top-heavy vehicle. This can cause the wheels to lock and skid or the vehicle to roll over. You should slow down before the curve and brake gently, if at all, while turning.

10. 10. Driving Safely

    How does liquid surge affect stopping a tank vehicle at a traffic light?

    • a.It can push the stopped vehicle forward into the intersection
    • b.It makes the brakes work twice as fast
    • c.It has no effect once the vehicle is stopped
    • d.It automatically holds the vehicle in place

    Đáp án: a

    Giải thích: When you brake to a stop, the liquid surges forward and can shove the vehicle ahead, sometimes into the intersection. This is especially strong in smooth bore tanks. Leaving extra stopping distance and stopping a bit early helps you account for this forward push.