1. Under the federal Hours of Service regulations, what is the maximum number of hours a commercial driver may drive after accumulating 70 hours of on-duty time in any 7-day cycle (Cycle 1)?
- A. The driver must stop driving immediately and cannot drive until 70-hour cycle resets. ✓
- B. The driver may drive up to 2 more hours if the trip started before reaching 70 hours.
- C. The driver must not drive once on-duty time reaches 70 hours until at least 24 consecutive hours off-duty are taken.
- D. The driver may drive an additional 8 hours if a co-driver is present in the sleeper berth.
Under Canada's federal Hours of Service rules for Cycle 1, a driver must not drive after accumulating 70 hours of on-duty time in any 7-day period. The driver may drive again only when sufficient hours have dropped out of the rolling 7-day window or after resetting Cycle 1, which requires at least 36 consecutive hours off duty; 24 consecutive hours off duty is not the Cycle 1 reset.
2. During a pre-trip inspection of an air brake system, you apply the service brakes firmly and hold them for one minute. What is the maximum allowable pressure drop for a single vehicle (no trailer)?
- A. 14 kPa (2 psi)
- B. 28 kPa (4 psi) ✓
- C. 48 kPa (7 psi)
- D. 70 kPa (10 psi)
For a single vehicle with air brakes, the applied-pressure leakage limit is generally 21 kPa (3 psi) in one minute; 28 kPa (4 psi) is the usual limit for a combination vehicle. Because 21 kPa (3 psi) is not listed, the answer choices should be revised.
3. When coupling a tractor to a semi-trailer, what is the correct order of the LAST two steps before moving the combination?
- A. Connect the air lines, then connect the electrical cord
- B. Test the connection by pulling gently against the locked kingpin, then raise the landing gear fully ✓
- C. Raise the landing gear fully, then test the coupling by pulling gently against the locked kingpin
- D. Connect the electrical cord, then lock the fifth-wheel release lever
After connecting air lines and the electrical cord, you must test the coupling by attempting to pull away with the trailer brakes set (the tug test) before raising the landing gear fully. Raising the landing gear before confirming a secure kingpin engagement risks the trailer dropping.
4. When securing a load using the cargo securement standard in Canada (NSC Standard 10), what is the minimum number of tiedowns required for a single piece of cargo that is 4 metres long and weighs 800 kg?
- A. One tiedown, provided it passes over the centre of the load.
- B. Two tiedowns are required for any cargo regardless of length or weight.
- C. Three tiedowns, since the cargo exceeds 3 metres in length. ✓
- D. Four tiedowns, one for each corner of the cargo.
Under NSC Standard 10 general cargo securement rules, a single article longer than 3.04 m requires two tiedowns for the first 3.04 m and one additional tiedown for each additional 3.04 m, or fraction of that length, unless a specific blocking/bracing exception applies. A 4 m article therefore requires three tiedowns.
5. What is the primary purpose of the air brake system's supply reservoir (wet tank)?
- A. To store compressed air for the service brakes only
- B. To receive air directly from the compressor and separate moisture and oil before air reaches other reservoirs ✓
- C. To power the parking brake spring chambers
- D. To regulate maximum system pressure to 690 kPa
The wet tank (supply reservoir) is the first tank air enters from the compressor. It collects moisture, oil, and contaminants before air is distributed to the service and secondary reservoirs, protecting downstream components.
6. A tractor-trailer is travelling at 90 km/h on a dry highway. Compared to a single unit truck of the same mass, the combination vehicle requires:
- A. The same stopping distance because the air brake system is identical
- B. A shorter stopping distance because the trailer brakes add extra braking force
- C. A longer stopping distance because of increased overall vehicle length and load transfer dynamics ✓
- D. A shorter stopping distance only when the trailer is empty
Combination vehicles have greater stopping distances than single-unit trucks of comparable mass due to greater overall length, load-transfer dynamics between the tractor and trailer, and the potential for trailer brake lag in air brake systems. Drivers must increase following distance accordingly.
7. Under the federal Hours of Service regulations, what is the maximum daily driving time permitted for a commercial driver who is not using a sleeper berth?
- A. 10 hours
- B. 11 hours
- C. 12 hours
- D. 13 hours ✓
Under Canada's federal Hours of Service regulations, a driver may drive a maximum of 13 hours in any day (defined as a 24-hour period). This is distinct from on-duty time, which is capped at 14 hours per day. The 13-hour driving limit applies whether or not a sleeper berth is used.
8. On a tractor-trailer combination, which component automatically applies the trailer brakes if the trailer breaks away from the tractor?
- A. The inversion valve
- B. The relay valve
- C. The glad hand check valve
- D. The trailer supply valve (emergency line) ✓
The trailer supply valve controls air flow through the emergency (supply) line. If the trailer separates, the emergency line loses pressure, causing the trailer's spring brakes to automatically apply — a critical safety feature of the air brake system.
9. What is the primary purpose of the trailer supply (emergency) air line (typically red-coded) in a tractor-trailer air brake system?
- A. To apply the trailer service brakes during normal stops
- B. To supply air to the trailer air tanks and control the trailer spring parking brakes ✓
- C. To regulate air pressure to the ABS modulator valves on the trailer axles
- D. To provide a backup air source to the tractor brake system if the tractor tank fails
The red-coded trailer supply (emergency) line carries air from the tractor to charge the trailer's air reservoirs and hold the trailer spring parking brakes in the released position. If this line loses pressure — due to separation or a major leak — the trailer spring brakes automatically apply as a fail-safe.
10. When transporting dangerous goods in Canada, what document must the driver have in the cab and be prepared to surrender to emergency responders?
- A. The carrier's insurance certificate listing dangerous goods coverage.
- B. A Transport Canada shipping permit for each dangerous good being carried.
- C. A shipping document (bill of lading) containing the required dangerous goods information. ✓
- D. A Material Safety Data Sheet (MSDS) for every product on the trailer.
Under the Transportation of Dangerous Goods Act and Regulations, the driver must carry a shipping document (such as a bill of lading) that includes the UN number, proper shipping name, class, packing group, quantity, and emergency contact number for each dangerous good. This document must be accessible to emergency responders and kept within reach in the cab while driving.