Idaho CDL — General Knowledge practice
Idaho CDL — General Knowledge: Parking & Stopping practice test
Legal and illegal parking, colored curbs, distances from hydrants and crossings, and how to park safely on hills.
Content reviewed against official driver handbooks · August 12, 2026
14 questions · pass with 11 correct. You get instant feedback and an explanation after every answer.
Study questions with answers
12 sample Parking & Stopping questions with the correct answer, a short explanation, and the official handbook reference. Read through them, then take the quiz above.
Show all 12 questions with answers
1. Vehicles loaded with explosives may be left unattended in a 'safe haven.' Who usually designates these approved places?
Correct answer: Local authorities
The manual says it is normally local authorities who decide which places are authorized as safe havens.
Source: Idaho Commercial Driver's License Manual — Section 9.6.1, Parking with Division 1.1, 1.2, or 1.3 Explosives
2. You stop your placarded truck to deal with an overheated tire. Do the rules on parking and attending placarded vehicles still apply?
Correct answer: Yes; they apply even while you check, repair or replace tires
The tire section reminds drivers that the parking and attendance rules hold during tire checks, repairs and replacements as well.
Source: Idaho Commercial Driver's License Manual — Section 9.6.9, Check Tires
3. In freezing weather, what can happen if you set the parking brakes while the brakes are very wet?
Correct answer: The brakes can freeze so the vehicle can't move
Wet brakes set in freezing temperatures can freeze solid and leave the vehicle stuck. The manual says to hold the vehicle with wheel chocks on level ground, and to dry wet brakes by using them lightly in a low gear.
Source: Idaho Commercial Driver's License Manual — Section 5.4.8, Parking Brakes
4. Where does the manual suggest stopping a school bus to deal with a serious discipline problem?
Correct answer: In a safe place off the road, such as a parking lot or a driveway
The tips for serious problems say to stop the bus somewhere safe and away from the roadway, giving a parking lot and a driveway as examples, then secure the bus and take the key if you leave your seat.
Source: Idaho Commercial Driver's License Manual — Section 10.5.2, Handling Serious Problems
5. How far from an open fire must a parked placarded vehicle be kept?
Correct answer: At least 300 feet
The parking rules for placarded vehicles forbid parking any closer than 300 feet to an open fire.
Source: Idaho Commercial Driver's License Manual — Section 9.6.2, Parking a Placarded Vehicle Not Transporting Division 1.1, 1.2, or 1.3 Explosives
6. You are parked with a load of Division 1.1 explosives and need to step away. When may you let someone else watch the vehicle for you?
Correct answer: Only when the vehicle is on the shipper's, carrier's, or consignee's property
Someone must always watch a parked vehicle carrying these explosives. Handing that job to another person is allowed only on property belonging to the shipper, the carrier or the consignee.
Source: Idaho Commercial Driver's License Manual — Section 9.6.1, Parking with Division 1.1, 1.2, or 1.3 Explosives
7. Why should the trailer hand valve never be used to hold a parked rig?
Correct answer: Air can bleed away and release the brakes on a trailer that has no spring brakes
The hand valve holds the trailer brakes with air, and that air can escape. Parking brakes should be used instead, with wheel chocks for a trailer lacking spring brakes.
Source: Idaho Commercial Driver's License Manual — Section 6.2.1, Trailer Hand Valve
8. While uncoupling, why do you set the parking brakes while the tractor is still pushing back against the kingpin?
Correct answer: It keeps the rig still while the locking jaws are free of pressure
Backing gently takes the load off the fifth wheel's locking jaws. Setting the parking brakes at that moment keeps the rig in that position, which makes the locking lever easier to release.
Source: Idaho Commercial Driver's License Manual — Section 6.4.2, Uncoupling Tractor-Semitrailers
9. What does the manual warn about when you park a set of doubles or triples?
Correct answer: Don't pull into a spot you can't pull straight through
Drivers of doubles and triples need to know how a parking lot is laid out so they don't end up in a space that can't be driven straight out of, which would mean a long and difficult escape.
Source: Idaho Commercial Driver's License Manual — Section 7.1.7, Parking the Vehicle
10. When you unload students at the school, how does the manual say to secure the bus?
Correct answer: Turn off the ignition switch, and take the key if you leave the driver's compartment
After a safe stop at the unloading area, the bus is secured by switching off the ignition and taking the key along whenever the driver leaves the driver's compartment.
Source: Idaho Commercial Driver's License Manual — Section 10.2.4, Unloading Procedures at School
11. A qualified person must watch while a cargo tank of hazardous material is loaded or unloaded. How close to the tank must that person stay?
Correct answer: Within 25 feet
The watcher has to stay alert, be able to see the tank clearly, remain within 25 feet, know the hazards and emergency procedures, and be authorized and able to move the tank.
Source: Idaho Commercial Driver's License Manual — Section 9.5.2, Tank Loading
12. What does the compressed gas section say to do with trailers and semitrailers once they are uncoupled from the power unit?
Correct answer: Always chock them so they can't move
Trailers and semitrailers that have been separated from the tractor must always be chocked so they stay put.
Source: Idaho Commercial Driver's License Manual — Section 9.5.4, Compressed Gas
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