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CDL Practice Test: Logbook Rules

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CDL Practice Test: Logbook Rules

Logbook Rules Questions

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Good Luck!

If you have used up all of your 14 hour on duty time, how many hours would you regain after an 8 hour break in the sleeper berth?
  • You will still have no hours remaining
  • None of these answers are correct
  • Your 14 hour limit would reset
  • You would regain half of your hours (7 hours total)
This is a question from page 95 - click here to look up the answer

Quote From Page 0 Of The Illinois CDL Manual:

Eight hours of sleeper berth time:

You may also use the sleeper berth to extend the 14 hour limit. Any period in the sleeper berth of at least 8 consecutive hours will not count as part of the 14 hours, and, therefore, would allow you to extend the time during which you could use your maximum 11 hours of driving.

TruckingTruth's Advice:

An 8 hour break will never add more hours to any of your limits. Rather, an 8 hour break simply extends your time by not counting the break against your 14 hour duty clock. The concept is confusing, but it's actually very simple. Here are some examples.

  • If you have 5 hours remaining on your 14 hour duty clock then go into the sleeper berth for 8 hours, at the end of your break you will still have 5 hours remaining.
  • If you have 1 hour remaining on your 14 hour duty clock then go into the sleeper berth for 8 hours, at the end of your break you will still have 1 hour remaining.
  • If you have 0 hours remaining on your 14 hour duty clock then go into the sleeper berth for 8 hours, at the end of your break you will still have 0 hours remaining.
  • As you can see, you will not gain any hours back after taking an 8 hour break. Instead, your available hours have simply been extended.

    So why would you ever want to take an 8 hour break instead of a 10 hour break? Here's an example:

    Let's say you have a delivery in the morning, but you are not allowed to park at your delivery location overnight. Instead, you have to stop at a truck stop 20 miles away to park for the night. In order to make your appointment on time, you must leave after only resting for 8 hours. If that's the case, you can still make the delivery on time by taking an 8 hour break instead of a full 10 hour break.

    Little situations like this will come up frequently as a truck driver. That's why it's so important to understand these little loopholes and tricks. We'll go through more examples later on in this section, but try to have a full understanding of the 10, 8 and split sleeper rules.

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Which violation occurs on the below example?

  • There is a 14 hour rule violation
  • There is an 11 hour rule violation
  • There is a 30 minute break violation
  • There are no violations on this log
This is a question from page 98 - click here to look up the answer

Quote From Page 0 Of The Illinois CDL Manual:

Violations: There is a 14 hour rule violation from 9:00 p.m. - 10:00 p.m.

Explanation - 11 Hour Limit: After 10 consecutive hours off duty, the driver was eligible to drive for up to 11 hours beginning at 2:00 a.m. The driver drove for just 1 hour between 9:00 p.m. and 10:00 p.m., far below the 11 hour driving limit.

Explanation - 30 Minute Break: The driver never drove a CMV after being on duty for more than 8 hours. Therefore, no violation has occurred.

Explanation - 14 Hour Limit: After 10 consecutive hours off duty, the driver had 14 hours available beginning at 2:00 a.m. Because the 14 hour calculation includes all off duty time of less than 10 consecutive hours, all of this driver's time between 2:00 a.m. and 10:00 p.m. is included in the calculation. Even though the driver spent 9 consecutive hours off duty, the 14 hour limit does not get extended. In order for an 8 consecutive hour (or longer) break to extend the 14 hour limit, the 8 consecutive hours must occur in the sleeper berth. However, the driver could have spent 10 hours off duty and both the 11 and 14 hour limits would have reset. The driver reached the 14 hour limit at 4:00 p.m. and violated the 14 hour rule at 9:00 p.m. by driving a CMV beyond the 14 hour duty limit.

NOTE: Even though this driver had 10 hours off duty during the day and only drove for 1 hour, that hour of driving was done in violation of the 14 hour rule. The driver did not obtain another 10 consecutive hours off duty, so the calculation point does not change and the 9-hour break must be included in the calculation of the 14 hour limit. After 10:00 p.m., the driver must be off duty for at least 10 consecutive hours, or in a sleeper berth for at least 8 consecutive hours, before driving again.

To remain in compliance: The driver should not have driven after 4:00 p.m., which was the end of the 14 hour limit. If he or she had gone into a sleeper berth for the 9 hour break, that break would have been excluded from the 14 hour calculation and the driver would have remained in compliance. Furthermore, the driver could have elected to remain off duty until 10:00 p.m. for a total of 10 hours off duty which would have reset both the 11 hour and 14 hour limits.

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Which of the following is considered off duty time?
  • Time inspecting or servicing your truck
  • When you are relieved of all duty and responsibility for performing work
  • Time spent doing paid work for anyone who is not a motor carrier
  • Anytime you aren't driving
This is a question from page 94 - click here to look up the answer

Quote From Page 0 Of The Illinois CDL Manual:

What Is Off Duty Time

By understanding the definition of on duty time, you will get a good idea of what is considered off duty time. In order for time to be considered off duty, you must be relieved of all duty and responsibility for performing work. You must be free to pursue activities of your own choosing and be able to leave the place where your vehicle is parked.

If you are not doing any work (paid or unpaid) for a motor carrier, and you are not doing any paid work for anyone else, you may record the time as off duty time.

Personal Use Of A Commercial Motor Vehicle

It is possible that occasionally you may not use a truck in commerce at all. You may be moving your personal belongings to a new house or, as a hobby you may be taking your horses to a horse show. As long as the activity is not in support of a business, you are not operating in commerce.

If you are not operating your truck in commerce, you are not subject to the hours of service regulations.

TruckingTruth's Advice:

As long as you aren't doing anything related to your job and you aren't earning any sort of compensation from anyone, you can log off duty. You also must be completely relieved of all duty and responsibility for performing work.

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What is the 8 day / 70 hour on duty limit?
  • You are not allowed to drive after you've been on duty 70 hours in the previous 8 consecutive days
  • None of these answers are correct
  • You are not allowed to be on duty more than 70 hours within the previous 8 days
  • You must have taken at least 70 hours off during the previous 8 days in order to drive legally
This is a question from page 93 - click here to look up the answer

Quote From Page 0 Of The Illinois CDL Manual:

The 8 day / 70 hour limit:

If your company does operate vehicles every day of the week, your employer may assign you to the 70-hour/8-day schedule. This means that you are not allowed to drive after you've been on duty 70 hours in any 8 consecutive days. Once you reach the 70 hour limit, you will not be able to drive again until you have dropped below 70 hours for an 8 consecutive day period. You may do other work, but you cannot do any more driving until you get below the limit. Any other hours you work, whether they are for a motor carrier or someone else, must be added to the total.

TruckingTruth's Advice:

The 8 day / 70hr limit will restrict how much time you're allowed to be on duty during an 8 day period. So if you take a 10 hour break to reset your 11 and 14 hour clocks, but have been on duty / driving for 65 hours in an 8 day period, you will only be able to drive 5 hours.


We'll give you some more examples later on in the program. This can be a little difficult to understand, but try to understand the differences between the 11hr, 14hr, and 70hr clocks.

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Which violations have occurred in the below example?

Day 1

Day 2

  • There is an 11 hour violation only
  • There is a 14 hour violation only
  • There is a 14 hour violation and a 30 minute break violation
  • There is a 14 hour violation and an 11 hour violation
This is a question from page 101 - click here to look up the answer

Quote From Page 0 Of The Illinois CDL Manual:

Day 1

Day 2

Violations: There is an 11 hour rule violation from 11:00 a.m. - 1:00 p.m., and a 14 hour rule violation from 7:00 a.m. - 1:00 p.m., both on Day 2.

Explanation - 11 Hour Limit: After 10 consecutive hours off duty, the driver had 11 hours of driving time available at 10:00 a.m. on Day 1. The driver did not have another 10 hour break (or the equivalent) until 1:00 p.m. on Day 2, so the calculation point never changes. The driver accumulated 7 total hours of driving on Day 1 and reached the 11 hour limit at 11:00 a.m. on Day 2. The violation began when the driver continued driving after that limit.

Explanation - 30 Minute Break: Since the longest consecutive stretch of on duty time was only 6 hours, the driver was never required to take a 30 minute break on either Day 1 or Day 2.

Explanation - 14 Hour Limit: Calculation of the 14 hour limit starts at 10:00 a.m. on Day 1. The 14 hour limit was reached at midnight, and the driver violated the 14 hour rule by driving a CMV starting at 7:00 a.m. on Day 2.

To remain in compliance: The driver should have stayed in the sleeper berth for one additional hour during one of the two sleeper berth breaks. This would have given the driver the equivalent of 10 hours off duty, making him or her eligible for the sleeper berth provision. This would have moved the calculation point to the end of the first of the two breaks (10:00 p.m. on Day 1) and the driver would have remained in compliance on Day 2, in this example.

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HOS regulations were designed to do all of the following except:
  • So that carriers can't force drivers to drive beyond their limits
  • To require drivers to keep an updated log showing all of their working and resting hours
  • To regulate the maximum amount of time drivers can spend resting between driving shifts
  • To ensure drivers wouldn't push themselves too far
This is a question from page 92 - click here to look up the answer

Quote From Page 0 Of The Illinois CDL Manual:

What Are Hours Of Service Regulations?

HOS regulations are rules issued by the Federal Motor Carrier Safety Administration (FMCSA) which is a division within the Department of Transportation (DOT). The regulations limit the number of daily and weekly hours which can be spent driving and working. They also regulate the minimum amount of time drivers must spend resting between driving shifts. Drivers are required to keep an updated log showing all of their working and resting hours.

Why Do HOS Regulations Exist?

The purpose of HOS regulations is to reduce accidents caused by driver fatigue. Many drivers don't like being told when they can and can't drive, but as you can see in Figure 13-1 below, the risk of an accident is directly related to how many hours a driver has been behind the wheel. HOS regulations were designed so that drivers wouldn't push themselves too far and also so that carriers can't force drivers to drive beyond their limits.

Figure 13-1

TruckingTruth's Advice:

The required resting periods are minimum requirements, not maximum requirements. The same can be said about working hours. Bottom line, if you're too tired to drive, don't drive!

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On what day and time does an 11 hour rule violation occur?

Day 1

Day 2

  • Day 1 at 11:00 p.m.
  • Day 2 at 8:00 a.m.
  • Day 2 at 6:30 a.m.
  • Day 2 at Noon
This is a question from page 103 - click here to look up the answer

Quote From Page 0 Of The Illinois CDL Manual:

Day 1

Day 2

Violations: There is an 11 hour rule violation from 6:30 a.m. - 1:00 p.m., and a 14 hour rule violation from 8:00 a.m. - 1:00 p.m., both on Day 2.

Explanation - 11 Hour Limit: After 10 hours off duty, the driver had 11 hours of driving time available at 10:00 a.m. on Day 1. The driver did not have another 10 hour break (or the equivalent) until 1:00 p.m. on Day 2, so the calculation point never changes. The driver accumulated 6 total hours of driving on Day 1 and reached the 11 hour limit at 6:30 a.m. on Day 2.

Explanation - 30 Minute Break: Since the driver was never on duty beyond an 8 consecutive hour period without taking at least 30 consecutive minutes off duty, the 30 minute break provision does not apply and no violations took place.

Explanation - 14 Hour Limit: Calculation of the 14 hour limit begins at 10:00 a.m. on Day 1. At midnight on Day 1, the driver still had 8 hours remaining because any sleeper berth period of at least 8 but less than 10 consecutive hours is excluded from the 14 hour calculation. The driver reached the 14 hour limit at 8:00 a.m. on Day 2, where the violation began. To remain in compliance, the driver should have stayed in the sleeper berth for 2 hours minimum, from 4:00 a.m. - 6:00 a.m., on Day 2. This would have moved the calculation point to 11:00 p.m. on Day 1 - the end of the first of the two qualifying breaks used to obtain the equivalent of 10 hours off - and the driver would have remained in compliance with the 14 hour rule and could have continued driving until 11:30 a.m., the 11 hour limit.

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Your log must include all of the following except:
  • Your signature
  • Your home address
  • Truck or tractor and trailer number
  • Total driving miles
This is a question from page 97 - click here to look up the answer

Quote From Page 0 Of The Illinois CDL Manual:

The regulations do not say what the log form must look like. However, it must include a 24-hour graph grid, which is shown in the regulations, and the following information on each page:

  • Total driving miles: You must write down the total number of miles you drove during the 24-hour period.
  • Main office address: You must write down your carrier’s main office address.
  • Truck or tractor and trailer number: You must write down either the vehicle number(s) assigned by your company, or the license number and licensing state for each truck (and trailer, if any) you drove during the 24-hour period.
  • Your signature: You must certify that all of your entries are true and correct by signing your log with your legal name or name of record.
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