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GA CLASS F WRITTEN TEST (LATEST TEST 2025) |
ALL QUESTIONS AND CORRECT ANSWERS |
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What effects can wet brakes cause? How can you avoid these problems? -- -------CORRECT ANSWER-----------------wet brakes can be weak or grab, don't drive through deep puddles or running water if you can avoid it You should let air out of hot tires so the pressure goes back to normal. True or False? ---------CORRECT ANSWER-----------------False. Air pressure will be too low when tires cool off. You can safely remove the radiator cap as long as the engine isn't overheated. True or False ---------CORRECT ANSWER-----------------False: Never remove the radiator cap or any part of the pressurized system until the system has cooled. What factors determine your selection of a "safe" speed when going down a long, steep downgrade? ---------CORRECT ANSWER-----------------Total weight of the vehicle and cargo, length of the grade, steepness of the grade, road conditions, weather. Why should you be in the proper gear before starting down a hill? --------- CORRECT ANSWER-----------------You will not be able to shift into a lower gear once you are going. Forcing an automatic transmission into a lower gear at high speed could damage the transmission
Describe the proper braking technique when going down a long, steep downgrade. ---------CORRECT ANSWER-----------------apply the brakes just hard enough to feel a definite slowdown; when speed has been reduced to approximately five mph below your "safe" speed, release the brakes; repeat when speed has increased to your "safe" speed What type of vehicles can get stuck on a railroad-highway crossing? --------- CORRECT ANSWER-----------------Low slung units. A single axle tractor pulling a long trailer with its landing gear set to accommodate a tandem axle tractor. How long does it take for a typical tractor-trailer unit to clear a double track? ---------CORRECT ANSWER-----------------It takes a typical tractor- trailer unit at least 14 seconds to clear a single track and more than 15 seconds to clear a double track. Stopping is not always the safest thing to do in an emergency. True or False? ---------CORRECT ANSWER-----------------TRUE. You can almost always turn to miss an obstacle more quickly than you can stop. What are some advantages of going right instead of left around an obstacle? ---------CORRECT ANSWER-----------------No oncoming traffic, clear shoulder, won't force someone else into oncoming traffic What is an "escape ramp"? ---------CORRECT ANSWER-----------------A long bed of loose, soft material to slow a runaway vehicle, sometimes in combination with an upgrade.
Common medicines for colds can make you sleepy. True or False --------- CORRECT ANSWER-----------------True What should you do if you become sleepy while driving? ---------CORRECT ANSWER-----------------stop in a safe place and sleep Coffee and a little fresh air will help a drinker sober up. True or False --------
- CORRECT ANSWER-----------------False. Only time will sober you up. What is a hazardous materials placard? ---------CORRECT ANSWER-------- ---------placards are signs put on the outside of a vehicle that identify the hazard class of the cargo Why are placards used? ---------CORRECT ANSWER-----------------to warn others of hazardous materials What is "sleep debt"? ---------CORRECT ANSWER-----------------If you don't sleep enough, you "owe" more sleep to yourself. What are the danger signals of drowsy driving? ---------CORRECT ANSWER-----------------your eyes close or go out of focus by themselves, you have trouble keeping your head up, you can't stop yawning, you have wondering disconnected thoughts, you don't remember driving the last few miles
What four things related to cargo are drivers responsible for? --------- CORRECT ANSWER-----------------1: Inspecting your cargo. 2: Recognizing overloads & poorly balanced weight. 3: Knowing Cargo is properly secured & does not obscure your view ahead or to the sides. 4: Knowing your cargo does not restrict your access to emergency equipment. How often must you stop while on the road to check your cargo? --------- CORRECT ANSWER-----------------Within the first 50 miles; after you have driven for 3 hours or 150 miles; after every break you take during driving How is Gross Combination Weight Rating different from Gross Combination Weight? ---------CORRECT ANSWER-----------------The GCWR is the maximum GCW specified by the manufacturer for a specific combination of vehicles plus its load, whereas the GCW is the total weight of a powered unit, plus trailer(s), plus the cargo. Name two situations where legal maximum weights may not be safe. --------
- CORRECT ANSWER-----------------During bad weather or in mountains What can happen if you don't have enough weight on the front axle? --------
- CORRECT ANSWER-----------------Under-loaded front axles can make the steering axle weight too light to steer safely & can cause poor traction. What is the minimum number of tiedowns for any flat bed load? --------- CORRECT ANSWER-----------------two
cracked or broken spring hangers, missing or broken leaves in any leaf spring, leaking shock absorbers, air suspension systems that are damaged and or leaking, any parts of the suspension or frame that is cracked or broken What three kinds of emergency equipment must you have? --------- CORRECT ANSWER-----------------fire extinguisher, 3 reflective triangles, spare fuses What is the minimum tread depth for front tires? For other tires? --------- CORRECT ANSWER-----------------You need at least 4/32-inch tread depth in every major groove on front tires. You need 2/32 inch on other tires. No fabric should show through the tread or sidewall. Name some things you should check on the front of your vehicle during the walk around inspection? ---------CORRECT ANSWER----------------- Condition of front axle, Condition of steering system, Condition of windshield, Lights and reflectors. What should wheel bearing seals be checked for? ---------CORRECT ANSWER-----------------leaks How many red reflective triangles should you carry? ---------CORRECT ANSWER-----------------three How do you test hydraulic brakes for leaks? ---------CORRECT ANSWER--- --------------Pump the brake pedal three times, then apply firm pressure to the pedal and hold for five seconds. The pedal should not move.
Why put the starter switch key in your pocket during the pre-trip inspection? ---------CORRECT ANSWER-----------------to prevent someone from moving the truck Why should you back towards the driver's side? ---------CORRECT ANSWER-----------------So you can see better. You can watch the rear of your vehicle by looking out the side window. If stopped on a hill, how can you start moving without rolling back? --------- CORRECT ANSWER-----------------Partly engage the clutch before you take your right foot off the brake. When backing, why is it important to use a helper? ---------CORRECT ANSWER-----------------There are blind spots you cant see! What's the most important hand signal that you can the helper should agree on? ---------CORRECT ANSWER-----------------Stop What are the two special conditions where you should downshift? --------- CORRECT ANSWER-----------------before starting down a hill, before entering a curve When should you downshift automatic transmissions? ---------CORRECT ANSWER-----------------when going down grades
What three things add up to total stopping distance? ---------CORRECT ANSWER-----------------Preception Distance + Reaction Distance + Braking Distance = Total STopping Distance If you go twice as fast, will your stopping distance increase by two or four times? ---------CORRECT ANSWER-----------------four times Empty trucks have the best braking. True or False? ---------CORRECT ANSWER-----------------False. Empty trucks require greater stopping distances, because an empty vehicle has less traction. It can bounce and lock up its wheels, giving much poorer braking What is hydroplaning? ---------CORRECT ANSWER-----------------The tires loose their contact with the road and have little or no traction What is "black ice"? ---------CORRECT ANSWER-----------------A thin layer that is clear enough that you can see the road underneath it. It makes the road look wet. How do you find out how many seconds of following distance space you have? ---------CORRECT ANSWER-----------------You need at least one second for each 10 ft of vehicle lenght at speeds below 40mph. You need to add one second for greater speeds.
If you are driving a 30-foot vehicle at 55 mph, how many seconds of following distance should you allow? ---------CORRECT ANSWER------------- ----4 seconds You should decrease your following distance if somebody is following you too closely. True or False? ---------CORRECT ANSWER-----------------False. You should increase your following distance. If you swing wide to the left before turning right, another driver may try to pass you on the right. True or False? ---------CORRECT ANSWER------------ -----True. A following driver may think you are turning left and try to pass you on the right. You may crash into other vehicle as you complete your turn. What is a hazard? ---------CORRECT ANSWER-----------------any road condition or other road user that is a possible danger Why make emergency plans when you see a hazard? ---------CORRECT ANSWER-----------------to be prepared if you have to take action in an emergency What are some tips to follow so you won't become a distracted driver? ------ ---CORRECT ANSWER-----------------Pre-program radio station, pre-load your favorite CDs, review maps and plan route before leaving. How do you use in-vehicle communications equipment cautiously? --------- CORRECT ANSWER-----------------Find a place to pull over and keep conversations short.
Why must air tanks be drained? ---------CORRECT ANSWER----------------- To drain moisture and oil out of the tank. What is a supply pressure gauge used for? ---------CORRECT ANSWER---- -------------To tell you how much pressure is in the air tanks All vehicles with air brakes must have a low air pressure warning signal. True or False? ---------CORRECT ANSWER-----------------True What are spring brakes? ---------CORRECT ANSWER-----------------a heavy spring that will engage the brakes if all air is out of the brake system Front wheel brakes are good under all conditions. True or False? --------- CORRECT ANSWER-----------------5. TRUE: Front-wheel braking is good under all conditions. Tests show that front-wheel skids from braking are not likely even on ice. How do you know if your vehicle is equipped with antilock brakes? --------- CORRECT ANSWER-----------------If the vehicle was manufactured on or after March 1, 1998. What is a dual air brake system? ---------CORRECT ANSWER----------------- A two brake system, one operates the front brakes and one operates the back brakes.
What are the slack adjusters? ---------CORRECT ANSWER-----------------It is an adjusting nut on the backside of the brake drum used for adjusting the brakes. How can you test the low pressure warning signal? ---------CORRECT ANSWER-----------------shut the engine off when you have enough pressure that the low pressure warning signal is not on. turn the electrical power on and step on and off the brake pedal to reduce the air pressure in the tank. the warning signal must come one before the pressure drops to less than 60psi How can you check that the spring brakes come on automatically? --------- CORRECT ANSWER-----------------Continue to fan off the air pressure by stepping on and off the brake pedal to reduce tank pressure. The tractor protection valve and parking brake valve should close (pop out) on a tractor-trailer combination and single vehicle types when the air pressure falls to the manufacturer's specification (20-40 psi). This will cause the spring brakes to come on. What are the maximum leakage rates? ---------CORRECT ANSWER---------- -------Less than 2 psi in one minute for single vehicles and less than 3 psi in one minute for combination vehicles. Why should you be in the proper gear before starting down a hill? --------- CORRECT ANSWER-----------------You will not be able to shift into a lower gear once you are going. Forcing an automatic transmission into a lower gear at high speed could damage the transmission
How long do you have to put out emergency warning devices. --------- CORRECT ANSWER-----------------Within 10 minutes How much tread depth is needed on front tires? ---------CORRECT ANSWER-----------------4/32 inch How much tread is needed on all other tires? ---------CORRECT ANSWER-- ---------------2/32 inch Should fabric show through the tread or sidewall? ---------CORRECT ANSWER-----------------No Suspension System Defects ---------CORRECT ANSWER------------------ spring hangers that allow movement of axel
- broken spring hangers
- missing/broken leaves in leaf spring (more than 1/4 missing=OOS) Emergency equipment ---------CORRECT ANSWER-----------------Fire extinguisher, spare electric fuses (unless it has circuit breakers), warning device for parked (3 triangles or liquid burning flares) Oil pressure ---------CORRECT ANSWER-----------------Idling=5-20 psi Operating = 35- 75 Low, dropping, fluctuating=stop immediately
Test for hydraulic leaks ---------CORRECT ANSWER-----------------Pump brake pedal 3 times, apply firm pressure and hold 5 secs, if pedal moves there is a leak/problem Check vehicle operation regularly ---------CORRECT ANSWER-----------------
- instruments
- air pressure gauges
- pressure gauges
- temperature gauges
- ammeter/voltmeter
- mirrors
- tires
- cargo/cargo covers
- lights When accelerating ---------CORRECT ANSWER-----------------Don't roll back when you start Backing safety ---------CORRECT ANSWER-----------------Start in proper position Look at path Use mirrors on both sides Back slowly Back and turn toward driver side when possible Use helper when possible Knowing when to shift up ---------CORRECT ANSWER-----------------engine speed and road speed
Total stopping distance= ---------CORRECT ANSWER----------------- perception distance + reaction distance + braking distance Perception distance ---------CORRECT ANSWER-----------------Time between when you see a hazard and when your brain recognizes it Reaction distance ---------CORRECT ANSWER-----------------Distance you will travel before physically hitting brakes Braking distance ---------CORRECT ANSWER-----------------The distance your car travels after you apply the brakes until you stop Effect of speed on stopping distance ---------CORRECT ANSWER------------- ----When you double your speed from 20 to 40 mph the impact is 4 times greater Triple the speed from 20 to 60, the impact is 9 times greater At 60 mph, stopping distance greater than football field length 80 mph, 16 times greater Effect of vehicle weight on stopping distance ---------CORRECT ANSWER-- ---------------the heavier the vehicle the more work the breaks must do it stop it.But the breaks, tires, springs, and shock absorbers on heavy vehicles are desinged to work best when the vehicle is fully loaded. Empty trucks require greater stopping distances because an empty vehicle has less traction. Slippery surfaces ---------CORRECT ANSWER-----------------Wet roads can double stopping distance
Reduce speeds by 1/3 on wet road On packed snow, reduce by 1/ On ice reduce to a crawl Identifying slippery surfaces ---------CORRECT ANSWER------------------ shaded areas
- bridges (32 degrees or lower)
- melting ice
- black ice
- vehicle icing
- after rain begins
- hydroplaning Speed on Downgrades ---------CORRECT ANSWER-----------------Maintain a speed not too fast for:
- Total weight of vehicle and cargo
- length of grade
- steepness of grade
- road conditions
- weather How much space? ---------CORRECT ANSWER-----------------10 feet of vehicle length for speeds below 40mph. At greater speeds, you must add one second for safety In a 60 foot rig, you will need 6 seconds Tailgater safety ---------CORRECT ANSWER------------------avoid quick changes
- increase following distance
- don't speed up
- avoid tricks
