Take Washington CDL Combination Practice Questions - Washington CDL Combination Vehicles Test Exam

QUESTION 1 / 25

Which Washington CDL knowledge test is listed for Class A combination applicants?

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ACDL combination (A)✓BPassenger only✓CHazardous materials only✓DSchool bus only✓

QUESTION 2 / 25

How many questions are on Washington's CDL combination (A) knowledge test?

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A10✓B20✓C25✓D50✓

QUESTION 3 / 25

What score passes Washington's 20-question CDL combination (A) knowledge test?

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A12 correct✓B14 correct✓C16 correct✓D20 correct only✓

QUESTION 4 / 25

What fee does Washington DOL list for a CDL knowledge test?

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A$$20✓B$$40✓C$$175✓D$$35✓

QUESTION 5 / 25

What must you do with required CDL knowledge tests before Washington issues a CLP?

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APass them✓BOnly schedule them✓CTake only a practice test✓DSkip them if trained✓

QUESTION 6 / 25

How old must a Washington CDL driver be for interstate commercial operation?

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AAt least 16✓BAt least 21✓CAt least 18✓DAny age with a CLP✓

QUESTION 7 / 25

How long are Washington CDL knowledge-test scores generally valid from the date passed?

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A30 days✓B90 days✓C180 days✓DTwo years✓

QUESTION 8 / 25

Which official guide should you study for the Washington combination test?

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AA competitor practice-test site✓BA passenger-car-only guide✓CA tire catalog✓DWashington State Commercial Driver Guide✓

QUESTION 9 / 25

After an original or upgraded CLP, how long must you wait before taking a Washington CDL skills test?

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A14 calendar days✓B24 hours✓C3 days✓D90 days✓

QUESTION 10 / 25

Which language rule does Washington publish for CDL knowledge testing?

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AAny interpreter may translate✓BThe test is available in four listed languages and interpreters are not allowed✓COnly English is offered✓DThe combination test is oral only✓

QUESTION 11 / 25

What is off-tracking?

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AThe trailer drifting sideways on a wet road✓BLoss of tire traction during heavy braking✓CThe rear wheels of the trailer following a tighter path than the tractor's front wheels in a turn✓DThe vehicle leaving its travel lane on a curve✓

QUESTION 12 / 25

You are making a right turn in a tractor-semi-trailer at a city intersection. Because of off-tracking, you should:

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ATurn the wheel as soon as the cab clears the curb✓BMake the turn as tightly as possible to stay in your lane✓CSlow down and use the trailer hand valve to stabilize✓DDrive farther into the intersection so the trailer's rear wheels clear the curb✓

QUESTION 13 / 25

When making a left turn in a combination vehicle, you should:

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AWatch for vehicles passing on your left in the lane next to you✓BMake the tightest left turn possible to clear faster✓CStart in the right-most lane available✓DUse the trailer hand valve halfway through the turn✓

QUESTION 14 / 25

Compared to a straight truck, a combination vehicle's steering response is:

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AFaster and more direct✓BDelayed and requires smaller, earlier corrections✓CIdentical✓DOnly affected by trailer length, not response time✓

QUESTION 15 / 25

What is a jackknife?

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AA loose connection between the kingpin and fifth wheel✓BA type of converter dolly used with doubles✓CThe tractor and trailer fold against each other at the coupling✓DA skid in which all four trailer tires lose traction simultaneously✓

QUESTION 16 / 25

If you start to feel the trailer skidding and swinging out behind you, what is the correct response?

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AApply the trailer hand valve to slow the trailer✓BSteer in the same direction as the trailer is swinging✓CUse the parking brake to lock the trailer in place✓DGet off the brakes so the trailer wheels can roll and the trailer can return inline✓

QUESTION 17 / 25

Why are empty trailers more prone to brake lock-up than loaded trailers?

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AThere is less weight on the tires, so they can lock up more easily✓BThe brakes are smaller on empty trailers✓CEmpty trailers use different brake fluid✓DEmpty trailers run at lower air pressure✓

QUESTION 18 / 25

Stopping distance for a combination vehicle is:

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AShorter than for a straight truck of the same weight✓BSignificantly longer than for a straight truck✓CAbout the same as a passenger car✓DIndependent of speed because of trailer brakes✓

QUESTION 19 / 25

On a wet, slippery road in a combination vehicle, you should:

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AMaintain normal speed but use the trailer hand valve✓BBrake harder than normal to compensate✓CReduce speed and increase following distance✓DDrive in the right lane only✓

QUESTION 20 / 25

What is the kingpin?

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AA locking lever on the fifth wheel✓BA bolt that secures the landing gear✓CThe release handle for the trailer brakes✓DA vertical pin in the trailer apron that locks into the fifth wheel jaws✓

QUESTION 21 / 25

Before backing under a trailer, the locking jaws on the fifth wheel must be:

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AOpen✓BClosed and locked✓CRemoved for inspection✓DGreased and closed✓

QUESTION 22 / 25

Which step is the correct order of the coupling procedure?

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AConnect air lines, then back under, then raise landing gear✓BInspect fifth wheel, position tractor, back under, tug test, visual check, connect air and electrical, raise landing gear✓CRaise landing gear first, then back under, then tug test✓DBack under, raise landing gear, then connect air lines✓

QUESTION 23 / 25

How do you perform the tug test after coupling?

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AHonk the horn and look for vibration✓BDrive forward five feet and check the trailer height✓CWith the trailer brakes set, gently pull the tractor forward in low gear✓DPull the trailer air supply knob and listen for air loss✓

QUESTION 24 / 25

After the tug test, you should also:

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ASkip the visual check if the tug test passed✓BDisconnect the air lines to verify the trailer brakes✓CApply the parking brake before lowering the landing gear✓DCrawl under and visually inspect the locked jaws around the kingpin✓

QUESTION 25 / 25

There is a visible gap between the trailer apron and the fifth wheel after coupling. What does this likely mean?

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AThe kingpin may be resting on top of the closed jaws — a dangerous high coupling✓BThe coupling is normal✓CThe trailer is overloaded✓DThe fifth wheel is properly greased✓