TX CDL COMBINATION PRACTICE TEST
11.
If you have convex mirrors, be aware that:
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objects seem closer than they really are.
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objects may appear to be faster than they really are.
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in a convex mirror objects appears larger than they really are.
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everything appears smaller in a convex mirror than it would if you were looking at it directly.
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12.
ABS will:
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shorten your stopping distance.
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not change your normal braking capability.
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increase your average speed.
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not give you more control over the vehicle during braking.
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13.
What factors can cause brakes to fail or fade?
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Not relying on the engine braking effect
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Excessive use of the service brakes
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Brakes out of adjustment
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All of the above.
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14.
Which of the following is NOT part of testing the tractor protection valve?
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Pulling forward slowly, then applying the trailer brakes.
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Stepping on and off the brake pedal several times to reduce the air pressure in the tanks.
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Shutting off the engine.
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Charging the trailer air brake system.
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15.
Under-loaded front axles can:
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make the steering axle weight too light to steer safely.
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cause poor traction.
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cause the drive wheels to spin easily.
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All of the above.
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16.
A high center of gravity means:
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you are more likely to tip over.
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you'll have better traction.
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a rollover is less likely.
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the spring brakes will come fully on.
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17.
The iron trailer supports are up, and the full weight of the trailer is resting on the tractor. Make sure:
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there is enough clearance between the upper and lower fifth wheel.
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the safety latch is not engaged.
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you are in a low enough gear.
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there is enough clearance between the rear of the tractor frame and the landing gear.
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18.
When driving on slippery roads, you should NOT:
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use the engine brake.
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go slowly.
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watch far enough ahead to keep a steady speed.
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try to anticipate stops early.
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19.
If you are feeling sleepy, you should:
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slow down and drive on the shoulder of the road.
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increase your speed to get to the destination quicker.
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pull off the road and rest or take a nap.
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None of the above.
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20.
When you have to back, you should always try to back toward the driver's side. Why?
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You can watch the front of your vehicle by looking out the side window.
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Backing toward the left side is more dangerous.
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You can see better and watch the rear of your vehicle by looking out the side window.
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All of the above.
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