Knowledge Test Class B - South Carolina Cdl

1 . On any upgrade, gravity will:

Speed up your vehicle. Slow down your vehicle. Not impact the speed of your vehicle. Cause your vehicle to swerve to the left. Click Here Full Cheat Sheet

2 . You should maintain at least ____ of following distance per every 10 feet of your vehicle when you are traveling more slowly than 40 mph.

One second Two seconds Three seconds Take a FREE Practice Test Now

3 . Which of the following is not a type of retarder?

Exhaust Engine Air Take a FREE Practice Test Now

4 . If hydraulic brakes fail, a driver can reduce their speed by:

Shifting into a higher gear. Shifting into a lower gear. Finding a hill. Letting the truck run out of gas. Take a FREE Practice Test Now

5 . How long is a CDL valid?

One year Two years Four years Five years Click Here Full Cheat Sheet

6 . In a leaf spring:

Leaves should be broken. Leaves can be missing. Leaves should not be broken. Take a FREE Practice Test Now

7 . How many daily hours of sleep does an adult need to maintain alertness?

Six to seven Seven to eight Eight to nine Take a FREE Practice Test Now

8 . One way to avoid becoming an aggressive driver is to:

Talk on your cell phone while driving. Question others' driving abilities. Set realistic expectations regarding travel time. Take a FREE Practice Test Now

9 . When testing a parking brake, the vehicle should:

Not be running. Be placed in a low gear while the driver attempts to pull forward. Be inspected by a professional mechanic. Be driven while the parking brake is applied. Click Here Full Cheat Sheet

10 . Which of the following is not an example of a distracted person that motorists should be worried about?

A driver talking to a passenger in their vehicle A child on the side of the road A construction worker on the side of the road A person sitting on a bench waiting for a bus Take a FREE Practice Test Now

11 . Move over laws require:

Trucks to use the left lane. All vehicles to vacate the lane closest to an emergency vehicle stopped with its lights flashing. All vehicles to use the left lane. All drivers to move into the left lane if a flatbed trailer is in the right lane. Take a FREE Practice Test Now

12 . Which of the following is not an indication of damaged brakes?

Cracked drums Shoes with oil or grease on them Shoes worn thinly Pads free of oil or grease Take a FREE Practice Test Now

13 . After a trip:

A vehicle should be placed out-of-service. A vehicle's oil should be changed. A vehicle's after-trip inspection should be completed. A vehicle's battery should be disconnected. Click Here Full Cheat Sheet

14 . Rims with welding repairs:

Are not safe to use. Are acceptable to be used on tires in the rear of the vehicle. Are acceptable to be used if carrying a light load. Take a FREE Practice Test Now

15 . If planning to drive a vehicle placarded for hazardous materials, you do not need a hazardous materials endorsement.

True False Take a FREE Practice Test Now

16 . What is the average driver’s reaction time?

1/16 of a second 1/8 of a second 3/4 of a second Take a FREE Practice Test Now

17 . What can happen if the air pressure gets too low in an air brake system?

The brakes may squeak. The brakes may stop working. The brakes may be sluggish. Click Here Full Cheat Sheet

18 . If a vehicle has air brakes, the air compressor drive belt should be checked before each drive. In what condition should the belt be?

Loose Tight Cracked Bumpy Take a FREE Practice Test Now

19 . A vehicle with air brakes may be driven without an air brake endorsement.

True False Take a FREE Practice Test Now

20 . An applicant hoping to be a city bus driver needs a passenger endorsement.

True False Take a FREE Practice Test Now

21 . Mismatched tire sizes are acceptable on the rear axles.

True False Click Here Full Cheat Sheet

22 . The Transportation Security Administration (TSA) can conduct a threat assessment for applicants of a hazardous materials endorsement.

True False Take a FREE Practice Test Now

23 . The parking brake in a newer vehicle is applied by:

Moving a lever to the right. Pushing a yellow, diamond-shaped knob. Pulling a yellow, diamond-shaped knob. Take a FREE Practice Test Now

24 . If you doubt that you have enough space to safely drive under a bridge or sign, you should:

Drive faster. Drive more slowly. Drive on the shoulder. Take a FREE Practice Test Now

25 . If you are being tailgated, you should:

Drive on the shoulder. Pull off the roadway. Drive faster. Allow the vehicle to pass. Click Here Full Cheat Sheet

26 . If an aggressive driver is involved in a crash on the road ahead, you should:

Stop and confront the driver. Stop a safe distance from the crash scene, wait for police to arrive, and tell them of the driver's behavior. Block the driver in with your vehicle. Take a FREE Practice Test Now

Study tip: Reduce your study time from hours to minutes with a DMV exam “Cheat Sheet” 99.2% of people who use the cheat sheet pass the FIRST TIME Click Here Full Cheat Sheet

27 . How many air storage tanks are used in an air brake system?

Two tanks Four tanks Six tanks The number varies. Take a FREE Practice Test Now

28 . Cargo with a high center of gravity:

Can make a vehicle likely to tip over. Is encouraged in inclement weather. Is required on some roads. Take a FREE Practice Test Now

29 . When crossing railroad tracks, you should:

Not stop. Try to pass slower vehicles. Change lanes. Put the vehicle in neutral. Click Here Full Cheat Sheet

30 . When using the controlled braking method in an emergency situation, you should:

Apply the brakes as hard as possible without locking the wheels. Apply the brakes with about half of your usual force. Apply the brakes so the wheels lock. Apply the brakes with minimal pressure. Take a FREE Practice Test Now

31 . When checking your tires as part of the pre-trip inspection, you should look at the:

Tire pressure. Tire color. Tire manufacturer. Take a FREE Practice Test Now

32 . An Anti-Lock Braking System (ABS):

Is not available for most trucks. Is not helpful in most situations. Is required on newer trucks. Take a FREE Practice Test Now

33 . Poisonous fumes can enter a cab due to:

A defective exhaust system. Using the wrong type of fuel. A lack of oil in the engine. Click Here Full Cheat Sheet

34 . A thin layer of ice that forms on road surfaces is called:

White ice. Black ice. Green ice. Blue ice. Take a FREE Practice Test Now

35 . When carrying a wide load, you should:

Drive as fast as possible. Obtain special permits and follow special rules, such as driving during certain hours. Honk at other drivers to get them to move from the lane closest to you. Drive on the shoulder. Take a FREE Practice Test Now

36 . Drowsy driving is most common during:

The night. The early morning. The mid-afternoon. Take a FREE Practice Test Now

37 . You should always be able to stop within:

10 feet of your vehicle. 1,000 feet of your vehicle. Your view of the road ahead. One minute of hitting the brakes. Click Here Full Cheat Sheet

38 . If you plan to transport hazardous materials, you must pass which endorsement test?

Tank Hazardous materials Passengers Take a FREE Practice Test Now

39 . How much water needs to be on the surface of a road for a vehicle to hydroplane?

Usually several inches A good amount, such as a large puddle A small amount None Take a FREE Practice Test Now

40 . A tank endorsement is:

Only required when transporting gases. Only required when transporting liquids. Required to transport both liquids and gases. Optional when transporting hazardous materials. Take a FREE Practice Test Now

41 . During an applied leakage test, the maximum leakage rate for a double combination vehicle is:

10 psi in a minute. 8 psi in a minute. 6 psi in a minute. 4 psi in a minute. Click Here Full Cheat Sheet

42 . Stopping distance can be affected by:

Speed. Engine oil. Time of day. Traffic. Take a FREE Practice Test Now

43 . What does the air compressor governor do?

Controls when the air compressor pumps air into the air storage tanks. Controls how quickly air leaves the air storage tanks. Controls the temperature of the air entering the air storage tanks. Controls the temperature of the air leaving the air storage tanks. Take a FREE Practice Test Now

44 . If being tailgated, you should speed up.

True False Take a FREE Practice Test Now

45 . Noting the speed of other vehicles is one way to determine when to upshift.

True False Click Here Full Cheat Sheet

46 . To help your vehicle be seen by others:

Your headlights should be clean. Your headlights should be turned off during the day. Your headlights should be covered with grease. Your headlights should be used, but only in the rain. Take a FREE Practice Test Now

47 . When carrying a wide load, a driver should:

Drive as fast as possible. Obtain special permits and follow special rules, such as driving only during certain times. Honk at other drivers to get them to move from the nearest lane. Drive on the shoulder. Take a FREE Practice Test Now

48 . An applicant may label parts of the vehicle that will be covered in the pre-trip inspection.

True False Take a FREE Practice Test Now

49 . Which of the following is not a type of retarder?

Exhaust Engine Air Electric Click Here Full Cheat Sheet

50 . Anti-Lock Braking Systems (ABS):

Reduce a vehicle's normal braking capacity. Are in addition to other braking systems and do not reduce a vehicle's braking power. Are not effective on larger vehicles. Take a FREE Practice Test Now