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20 questions from the cdl hours of service and trip planning practice test.
10 questions, graded as you go, with the reason for every answer. No sign-up.
A driver came on duty at 6:00 a.m. after 10 hours off. At 3:30 p.m., how many hours are left in his 14-hour driving window?
Answer in hours.
4.5 hours
Window closes 14 hours after 6:00 a.m., at 8:00 p.m. From 6:00 a.m. to 3:30 p.m. is 9.5 hours. 14 - 9.5 = 4.5 hours.
Reference: 49 CFR 395.3(a)(2)
A driver came on duty at 5:00 a.m. after 10 hours off. He spent 1 hour on duty loading, drove 5 hours, took a 1-hour off-duty lunch, then drove 3 hours. It is now 3:00 p.m. How many more hours may he drive today?
Answer in hours.
3 hours
Driving used: 5 + 3 = 8 h, so 11 - 8 = 3 h of driving left. Window used: 5:00 a.m. to 3:00 p.m. = 10 h, so 14 - 10 = 4 h of window left. The smaller figure controls: 3 hours.
Reference: 49 CFR 395.3(a)
A driver began driving at 6:00 a.m. and has driven continuously except for a 10-minute on-duty fuel stop from 8:00 to 8:10 a.m. It is now 11:10 a.m. How many more hours may he drive before a 30-minute break is required?
Answer in hours.
3 hours
Driving so far: 6:00 to 8:00 (2 h) plus 8:10 to 11:10 (3 h) = 5 h. The 10-minute stop is under 30 minutes, so the count did not reset. 8 - 5 = 3 hours.
Reference: 49 CFR 395.3(a)(3)(ii)