CDL GENERAL KNOWLEDGE TEST (SOUTH DAKOTA) - PRACTICE TEST

41. When using mirrors, you should keep an eye on your tires:
to spot a tire fire.
to check tread depth.
to make sure they are properly inflated.
to see if they are rolling properly.
42. In some states, move-over laws require drivers to:
obey the directions given by police officers at railroad crossings.
slow and change lanes when approaching a roadside incident.
submit to a chemical test to determine their BAC when requested by a peace officer.
All of the above.
43. While driving at night, use __________ when it is safe and legal to do so.
emergency flashers
interior lights
low beams
high beams
44. B:C type fire extinguishers are suitable for dealing with:
electrical fires and burning liquids.
wood fires.
tire fires.
cloth and paper fires.
45. When inspecting mirrors and windshields for dirt, cracks, illegal stickers, and other obstructions to seeing clearly, you should:
write all necessary adjustments in your pre-trip inspection.
clean and adjust as necessary.
leave it as is and write any instructions or notes on the vehicle inspection guide.
None of the above.
46. Before driving a vehicle with a dual air system, allow time for the air compressor to build up a minimum of ____ pressure in both the primary and secondary systems.
25 psi
50 psi
100 psi
75 psi
47. If coolant has to be added to a system without a recovery tank, you should:
turn the radiator cap quickly to the first stop.
keep the engine running while adding coolant.
never use thick cloth to touch the radiator cap.
wait until the engine has cooled before adding coolant.
48. Emergency lines are often coded with the color ___ to keep from getting them mixed up with the service line.
blue.
white.
yellow.
red.
49. HAZMAT placards are:
optional signs
speed signs
warning signs
regulatory signs
50. Which of the following is not a braking system on a truck?
Emergency brake
Steering brake
Service brake
Parking brake
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