Knowledge Test Class B - Iowa Cdl

1 . When checking power steering hoses during a pre-trip inspection, you should look for:

Leaks. Secure connections to the battery. Extra hose pieces available for repairs. Click Here Full Cheat Sheet

2 . 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

3 . When completing an offset back/right parking maneuver, you should:

Pull straight forward, then drive straight back. Drive straight back, then pull forward to the left. Pull straight forward, then back to the right. Take a FREE Practice Test Now

4 . During a pre-trip inspection, belts should be:

Left alone and not inspected. Checked for tightness. Inspected, but only about once a month. Take a FREE Practice Test Now

5 . For a hazardous materials endorsement, an applicant will be required to:

Provide their fingerprints and undergo a background check. Provide employment history from the last five years. Provide a list of countries visited within the last 10 years. Click Here Full Cheat Sheet

6 . When mirrors are properly adjusted:

No part of the vehicle should be visible in the mirrors. A part of the vehicle should be visible in the mirrors. More than half of each mirror should show the vehicle. Take a FREE Practice Test Now

7 . Within 10 minutes of stopping on the side of the road, you must:

Place emergency warning devices. Alert local law enforcement. Call a mechanic. Take a FREE Practice Test Now

8 . Steering wheel play should be no more than:

10 degrees. 50 degrees. 75 degrees. Take a FREE Practice Test Now

9 . The two markings on a front brake limiting valve usually read:

"Normal" and "slippery." "Low" and "high." "Left" and "right." Click Here Full Cheat Sheet

10 . Black ice is:

Usually thick. Usually thin. Not a hazard when driving. Take a FREE Practice Test Now

11 . Having more than one license may result in:

A fine of up to $5,000. Jail time. Both of the above. Take a FREE Practice Test Now

12 . If your automobile license is suspended:

You will not need to tell anyone. You must tell your employer. Your CDL will remain unaffected. Take a FREE Practice Test Now

13 . If you are being tailgated, you should:

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

14 . When making a lane change, your turn signal:

Should always be used. Should only be used if there is traffic present. Should only be used between dusk and dawn. Take a FREE Practice Test Now

15 . How soon after starting a trip must cargo securement be checked?

After 50 miles After 100 miles After 250 miles Take a FREE Practice Test Now

16 . When in heavy traffic, the safest driving speed is:

Slower than the speed being driven by surrounding traffic. The same speed being driven by surrounding traffic. Faster than the speed being driven by surrounding traffic. Take a FREE Practice Test Now

17 . If exiting a bus, a driver must:

Never make contact with the handrail. Maintain contact with the handrail. Move quickly. Click Here Full Cheat Sheet

18 . Distracted driving can be avoided by:

Pre-programming radio stations. Smoking while driving. Eating while driving. Take a FREE Practice Test Now

19 . What helps prevent wheel lockup when braking?

An Anti-Lock Braking System (ABS) Air brakes An alternator Take a FREE Practice Test Now

20 . What is often found in compressed air?

Water Cardboard Brake fluid Take a FREE Practice Test Now

21 . If a five-foot-long item is placed on a flatbed trailer, it must be secured by at least:

One tie-down. Two tie-downs. Three tie-downs. Click Here Full Cheat Sheet

22 . During a static leakage test, what is the maximum leakage rate that is safe for a double combination vehicle?

3 psi in one minute. 6 psi in one minute. 8 psi in one minute. Take a FREE Practice Test Now

23 . When driving:

It is best to hide your intentions from others. You should only use turn signals if there are vehicles near you. You should not use turn signals in construction zones. You should always use turn signals to warn others about your intentions. Take a FREE Practice Test Now

24 . When transporting a load, you should inspect the cargo:

Only before starting to drive. At the end of each day. Every time you take a break. Take a FREE Practice Test Now

25 . A low air pressure warning signal should activate:

When tank pressure falls below 120 psi. When tank pressure falls below 60 psi. When tank pressure falls below 10 psi. When tank pressure falls below 5 psi. Click Here Full Cheat Sheet

26 . Which of the following is not a cause of hydraulic brake failure?

Loss of hydraulic pressure Brake fade on long hills Downshifting 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 . Operating a CMV with any measurable amount of alcohol in your system will result in an out-of-service order for:

24 hours. One week. One month. One year. Take a FREE Practice Test Now

28 . Watching the road ahead of you:

Allows you time to make a plan to avoid an upcoming hazard. Is not encouraged as it distracts you from driving. Is only important when traveling in congested traffic. Take a FREE Practice Test Now

29 . When completing a conventional parallel parking maneuver, you should:

Back up past the parking space, then pull forward into it. Pull forward past the parking space, then back into it. Pull forward directly into the parking space. Click Here Full Cheat Sheet

30 . Rough acceleration:

Can damage parts of a vehicle. Is necessary to warm up parts of a vehicle. Is encouraged to improve a vehicle's gas mileage. Take a FREE Practice Test Now

31 . When driving at night, you should do all of the following, except:

Make sure you are rested. Make sure your glasses are clean. Wear sunglasses. Take a FREE Practice Test Now

32 . You may:

Have more than one license if one is for business purposes. Have more than one license if they are issued by different states. Not have more than one license. Take a FREE Practice Test Now

33 . When driving in hot weather:

The air pressure in tires will decrease. The engine oil can help to keep the engine cool. Antifreeze is not important. Click Here Full Cheat Sheet

34 . When a vehicle is started, the coolant temperature should:

Decrease. Rise slowly. Jump quickly. Take a FREE Practice Test Now

35 . The rods in S-cam brakes move the slack adjusters when air pressure is added to the brake chambers. This air pressure is added to the chambers when the driver:

Presses the brake pedal. Uses the emergency brake. Uses the trailer hand valve. Take a FREE Practice Test Now

36 . 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

37 . If unable to tell if the road is becoming icy and slippery, a driver:

Should try guessing. May open their window and feel the front of the side mirror for ice. Should look at the road closely. Click Here Full Cheat Sheet

38 . Off-ramps:

Are usually safest for trucks. Can be dangerous for trucks. Should not be used by trucks. Take a FREE Practice Test Now

39 . Interstate carriers must have what information affixed to the commercial motor vehicles in their fleet?

Trade name Width of the truck Length of the truck Take a FREE Practice Test Now

40 . When using a mirror, you should:

Look quickly at the mirror. Stare at the mirror for a long time. Use only the driver’s side mirror. Take a FREE Practice Test Now

41 . An after-trip inspection should be done:

Once a week. Once a month. After every trip. Click Here Full Cheat Sheet

42 . Hanging meat as cargo is usually:

Very stable. Easy to handle. Unstable. Take a FREE Practice Test Now

43 . When changing lanes:

You should not use your mirrors. You should use your mirrors. You should not use your turn signals. Take a FREE Practice Test Now

44 . When driving, being aware of what is happening behind you is:

Not important. Important. Distracting. Take a FREE Practice Test Now

45 . A truck should be parked:

So that it must be backed up to leave the space. So that it can be pulled forward to leave the space. On the grass. Click Here Full Cheat Sheet

46 . Driving at night is:

Safer than driving during the day. Just as safe as driving during the day. More dangerous than driving during the day. Take a FREE Practice Test Now

47 . How much distance will an air brake-equipped vehicle need to come to a complete stop if it is traveling at 55 mph under ideal driving conditions?

300 feet 100 feet 450 feet Take a FREE Practice Test Now

48 . As part of the vehicle inspection test, you will be asked to:

Explain why you must check the items you are checking. Change the coolant. Replace a headlight. Take a FREE Practice Test Now

49 . People working on a disabled vehicle:

Are probably aware of the roadway. May be distracted by the repair and not pay attention to the roadway. Are exempt from traffic laws. Click Here Full Cheat Sheet

50 . Mirrors should be:

Checked only when changing lanes. Checked frequently. Checked only if there is a reason to suspect a problem. Take a FREE Practice Test Now