Truck Test 4

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1.When removing fittings or hoses from an air brake system, you should make sure that the air pressure is…?

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2.If a driver has permission to operate vehicles with air brakes, what endorsement will appear on their license?

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3.A typical cylinder in an air brake system can generate a force of…?

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4.To qualify for an air brake endorsement in Alberta, a driver must have had a minimum of how many hours of instruction (not including breaks)?

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5.When descending a long hill, you should apply the brakes…?

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6.Brake components are constructed to withstand up to what temperature under hard braking?

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7.If you are driving a truck and trailer combination of 20 m in length, you should allow how much following distance?

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8.When a driver sees a problem, how long will they usually be between identifying the hazard and applying the brake?

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9.At what pressure in psi should the park control valve pop out?

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10.When braking what should you do to prevent your vehicle jerking back?

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11.The first action in any air brake inspection should be what?

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12.If your air brake system is colour-coded, the secondary circuit components will be what colour?

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13.How many different circuits are there in an air brake system?

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14.What is the most common fault found with air brake systems during commercial vehicle inspections?

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15.When testing the supply circuit, the compressor should be able to build from 50 to 90 psi within what time?

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16.Brake fade occurs because the brakes are…?

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17.A braking system works by converting the energy of motion into what?

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18.A vehicle travelling at 40 km/h will need how much more stopping power than a vehicle travelling at 20 km/h?

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19.Atmospheric pressure at sea level is approximately what?

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20.To test for air system leaks, you should apply and firmly hold a full service brake application for two minutes. The system should not lose more than 4 psi, plus what additional losses per trailer?

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21.Which of these has the ultimate responsibility to ensure their vehicle has safe, properly adjusted brakes before taking a vehicle out on the road?

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22.The lag time between an air brake being applied and the brake beginning to function is approximately…?

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23.To perform an air brake inspection, the vehicle should be…?

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24.One advantage that air brake systems have over hydraulic brake systems is that they are better able to tolerate what?

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25.A tractor-trailer combination has accelerated to 100 km/h but now needs to make an emergency stop within seven seconds. The stopping force required will be approximately how many times more than the acceleration force?

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26.The governor should supply more air to the tanks when the system pressure drops by approximately how much?

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27.In a colour-coded airbrake system, the park supply components will be which colour?

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28.The supply circuit in an air brake system does what?

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29.Which of these is not part of a simplified service brake circuit?

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30.

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31.A normal stop usually requires air pressure to the brakes at less than…?

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32.Steering axles most typically have what effective diaphragm area in their brake chambers?

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33.The supply tank is also known as what?

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34.When the low-pressure warning device is activated, what should the driver do?

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35.The safety valve on the supply tank will vent if pressure rises above…?

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36.When using antifreeze in an air brake system, you should always use a solution that contains what?

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37.Which of these is the primary reason to have a dual air brake system?

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38.Contamination in the system must be prevented from accumulating by draining the tanks how often?

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39.The governor is set to cut out when air pressure reaches a maximum of…?

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40.The best output for a compressor is reached when the engine is at about what level of its maximum rated rpm?

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41.The double foot valve when applied operates…?

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42.The primary purpose of the supply tank is to do what?

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43.What is the purpose of a check valve?

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44.Which of these supports rapid brake application and release?

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45.The secondary service circuit in a dual braking system works on…?

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