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If you are required to stop at railroad crossings, you must …
Correct answer(s):
- Stop 15 to 50 feet before the nearest rail
- Remember to never shift gears while crossing tracks
- Proceed only when you are sure no train is coming
A vehicle placarded for Division 1.1, 1.2, or 1.3 explosives …
Correct answer(s):
- may be left unattended in a safe haven
If you are hauling hazardous materials and have ___ tires on your vehicle, you must stop and check them every time you park.
Correct answer(s):
- dual
You must have placards for explosives, poison gas, or dangerous when wet exceeding …
Correct answer(s):
- 10 pounds, 10 cartons, or 100 pounds amount
What is the synonym of ‘Competent’?
Correct answer(s):
- Capable
Coronavirus (COVID-19) disease is the first pandemic since which pandemic?
Correct answer(s):
- flu pandemic (H1N1)
Where did the World Health Organization (WHO) declared the outbreak of a new coronavirus disease in January 2020?
Correct answer(s):
- Hubei in China
What is leap year?
Correct answer(s):
- Every year that is exactly divisible by 4 is a leap year and the centurial years are leap years if they are exactly divisible by 400.
What is the primary purpose of a front brake limiting valve?
Correct answer(s):
- Cuts the air pressure to the front brakes by half
Which of the following will affect the stopping power of spring brakes?
Correct answer(s):
- Road conditions
- Proper adjustment
- Modulating control valve position (if equipped)
A dual air brake system has which of the following features?
Correct answer(s):
- One set of brake controls and two separate air brake systems
Where are foundation brakes used?
Correct answer(s):
- On all wheels
Which of the following parts of the air brake systems should be checked during the pre-trip walk around inspection?
Correct answer(s):
- Slack adjusters on S-cam brakes
- Air hoses connected to the brake chambers
- Brake discs or drums
During inspection, if a slack adjuster moves less than about one inch where the push rod attaches to it, which of the following statements is true?
Correct answer(s):
- It has the appropriate amount of slack
When testing the air leakage rate (by turning off the engine and releasing the parking brake), what is an acceptable air loss rate?
Correct answer(s):
- Less than 2 psi in one minute for single vehicles and less than 3 psi in one minute for combination vehicles.
Which of the following is not a step in testing that the spring brakes come on automatically?
Correct answer(s):
- Pull out the parking brake control knob
If you use controlled braking, which of the following is an acceptable procedure?
Correct answer(s):
- Release the brakes if you need to make a large steering adjustment
What should you do if the low air pressure warning light comes on?
Correct answer(s):
- Stop and safely park your vehicle as quickly as possible
What is the proper technique to use when braking on downgrades?
Correct answer(s):
- Apply the brakes just hard enough to slow down about 5 mph below your safe speed
If your vehicle does not have automatic air tank drains, how often should you drain the tanks?
Correct answer(s):
- At the end of each working day