Vehicle Equipment & Safe Operation — New York
New York CDL practice test: 389 free practice questions (Based on the official driver handbook). The official format is not yet verified; check the official site before your test. Vehicle Equipment & Safe Operation: 170 questions.
Brakes, tires, lights, mirrors, seat belts, child seats and basic vehicle control.
This topic page is still being reviewed against the official handbook. Until review is finished it is hidden from search engines.
| Topic / Metric | Value |
|---|---|
| Topic | Vehicle Equipment & Safe Operation |
| License test | New York CDL permit (CLP) knowledge tests |
| Topic questions | 170 (44% of 389 total) |
| Review status | This topic page is still being reviewed against the official handbook. Until review is finished it is hidden from search engines. |
Official handbook
Not yet verified
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Questions (170)
1. A modulating control valve can control the:
- Spring brakes. ✓
- Landing gear.
- Air brakes.
- Anti-lock braking system (ABS).
Answer: A. Spring brakes.
A modulating control valve lets you apply the spring brakes gradually with a dash-mounted control handle. The handbook describes a modulating valve as a spring-loaded control handle on the dashboard that applies the spring brakes gradually: the farther you move the lever, the harder the spring brakes come on. It exists so you can still control the spring brakes if the service brakes fail. Nothing in the passages ties this valve to air brakes in general, to landing gear, or to the anti-lock braking system, so the only matched choice is the spring brakes.
2. When checking the engine compartment:
- The parking brake should not be engaged.
- Wheels should be chocked. ✓
- The engine should be running.
- The gearshift should be in first gear.
Answer: B. Wheels should be chocked.
When checking the engine compartment, make sure the wheels are chocked or the parking brakes are on. The handbook's engine-compartment step says to check that the parking brakes are on and/or the wheels are chocked. That holds the vehicle in place while you raise the hood, tilt the cab, or open the engine compartment door. Chocking the wheels is one of the accepted ways to meet that condition, so it fits the bank answer.
3. When driving a vehicle equipped with an Anti-Lock Braking System (ABS), you should:
- Stop harder than you would in a vehicle not equipped with ABS.
- Use extra braking force to ensure the ABS kicks in.
- Brake as you would in a vehicle not equipped with ABS. ✓
- Brake with less force than you would in a vehicle not equipped with ABS.
Answer: C. Brake as you would in a vehicle not equipped with ABS.
You should brake as you would in a vehicle not equipped with ABS. The handbook says ABS is an add-on to your normal brakes. It does not increase or decrease your normal braking power, and it does not change the way you normally brake. Under normal brake conditions, the vehicle stops as it always stopped. ABS only comes into play when a wheel would otherwise lock up because of overbraking. It may help you keep control during hard braking, but it does not necessarily shorten stopping distance. So the correct habit is to use your normal braking method.
4. Where is the safety relief valve usually located?
- Near the rear brake
- Near the front brake
- In an air tank ✓
- On the dashboard
Answer: C. In an air tank
The safety relief valve is usually located in an air tank, specifically the first tank the air compressor fills. The handbook places the safety relief valve in the first tank that the air compressor pumps air into, not at a wheel brake or on the dashboard. It protects that tank and the rest of the system from too much pressure and is set to release air if pressure gets too high. That is why the correct choice is the air tank location. If the valve releases air, the handbook says something is wrong and a mechanic should fix the fault.
5. When a brake pedal is pressed and the S-cam is turned, the S-cam:
- Presses the brake shoes against the inside of the brake drum. ✓
- Tightens the brake drum onto the axle.
- Presses the brake lining against the wheel.
- Releases air from the air tanks.
Answer: A. Presses the brake shoes against the inside of the brake drum.
When the brake pedal is pressed and the S-cam turns, it forces the brake shoes apart and presses them against the inside of the brake drum. The handbook describes the S-cam as shaped like the letter S. Pushing the pedal lets air into the brake chamber, the push rod moves the slack adjuster, and the camshaft twists, turning the S-cam. That rotation forces the brake shoes away from each other and against the inside of the drum. The resulting friction slows the vehicle. The same section says releasing the pedal rotates the S-cam back and a spring pulls the shoes away from the drum, so the wheels roll freely.
6. Most heavy-duty vehicles use ____ air brake systems.
- Single
- Dual ✓
- Triple
- Quad
Answer: B. Dual
Most heavy-duty vehicles use dual air brake systems, so the correct choice is Dual. The handbook's air brake section says heavy-duty vehicles generally have dual systems because safety is improved by having two separate air brake systems. They share one set of brake controls, but each system has its own tanks, hoses, and lines. Typically one system works the regular brakes on the rear axle or axles, and the other works the regular brakes on the front axle. That description matches Dual, not a single system.
7. During the pre-trip vehicle inspection test:
- Applicants will not have to identify the ABS.
- Windshield wipers are not to be addressed.
- Shock absorbers only need to be checked on one axle.
- The steering box should be checked for leaks. ✓
Answer: D. The steering box should be checked for leaks.
During the pre-trip inspection, the steering box is one of the steering parts you check for leaks, so that statement is the correct one. The handbook lists the steering gear box among the steering parts that must not be bent, loose, or broken, and it tells you to check the power steering hoses, pump, and fluid level and to look for leaks. The vehicle inspection section repeats that steering hoses and connections must not be cracked, worn, or leaking, and it explains that correct fluid levels are what let the steering system work as it should. So looking for leaks around the steering box fits the inspection the handbook describes.
8. A vehicle equipped with an Anti-Lock Braking System (ABS) uses a ____ light to warn that the system is not working properly.
- Green
- Yellow ✓
- Orange
- White
Answer: B. Yellow
An ABS-equipped vehicle uses a yellow malfunction lamp to warn you that the system is not working properly. The handbook says vehicles with ABS have yellow malfunction lamps that tell you if something isn't working. On tractors, trucks, and buses that lamp sits on the instrument panel; on trailers it is on the left side, at the front or rear corner. A lamp that stays on after the bulb check, or comes on once you are moving, means you may have lost ABS control at one or more wheels. Color matters here: the warning lamp is yellow, not another color.
9. When driving, the steering wheel should be:
- Held with one hand.
- Held with both hands on opposite sides of the wheel. ✓
- Held with both hands at the bottom of the wheel.
- Held with both hands at the top of the wheel.
Answer: B. Held with both hands on opposite sides of the wheel.
The steering wheel should be held firmly with both hands on opposite sides of the wheel. The handbook's steering section says to grip the wheel firmly with both hands, placed on opposite sides. It gives the reason too: if you hit a curb or pothole, the wheel can jerk out of your hands unless you are holding it firmly. The emergency section repeats the same idea, saying that keeping both hands on the wheel at all times is the best way to be ready to turn quickly when a hazard appears.
10. During a static leakage test, the maximum leakage rate for a triple combination vehicle with air brakes is ____ in a minute.
- 3 psi
- 5 psi ✓
- 7 psi
- 9 psi
Answer: B. 5 psi
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Source
Last checked: 2026-10-17 · Verified from official source
Updated: · Based on the official driver handbook