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FL CDL Combination Practice Questions - Florida CDL Combination Vehicles Test Exam
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Question
1
of 25
QUESTION 1 / 25
Which Florida CDL applicant must take the Combination Vehicles knowledge test?
Choose one answer below.
A
A Class A applicant operating qualifying truck or truck combinations
✓
B
A straight truck with no trailer
✓
C
A passenger bus only
✓
D
A motorcycle endorsement vehicle
✓
QUESTION 2 / 25
What is a combination vehicle?
Choose one answer below.
A
A straight truck with no trailer
✓
B
A passenger bus only
✓
C
A motorcycle endorsement vehicle
✓
D
A truck or tractor pulling one or more trailers
✓
QUESTION 3 / 25
For a Florida Class A CDL, the towed unit generally must exceed what GVWR when the combination is at least 26,001 pounds?
Choose one answer below.
A
8,000 pounds
✓
B
15,000 pounds
✓
C
10,000 pounds
✓
D
5,000 pounds
✓
QUESTION 4 / 25
Which Florida CDL manual section covers combination vehicles?
Choose one answer below.
A
Section 8
✓
B
Section 6
✓
C
Section 3
✓
D
Section 5 only
✓
QUESTION 5 / 25
What is off-tracking?
Choose one answer below.
A
The trailer rear wheels follow a shorter inside path than the tractor front wheels
✓
B
The trailer ABS lamp stays on
✓
C
The fifth wheel unlocks in a turn
✓
D
The engine loses power
✓
QUESTION 6 / 25
Why should you slow before entering a curve with a combination vehicle?
Choose one answer below.
A
Speed up and make a sharp correction
✓
B
Use the trailer hand valve as the main control
✓
C
To shift cargo higher
✓
D
To reduce rollover and skid risk before steering forces build
✓
QUESTION 7 / 25
How should cargo be placed to help reduce rollover risk?
Choose one answer below.
A
Loose so it can settle
✓
B
All against the rear doors
✓
C
Low and centered
✓
D
High and to one side
✓
QUESTION 8 / 25
Which control should be used for normal stopping?
Choose one answer below.
A
The fifth wheel release handle
✓
B
The foot brake pedal
✓
C
Use the trailer hand valve as the main control
✓
D
Use the parking brake for normal moving stops
✓
QUESTION 9 / 25
What color is commonly used for the trailer emergency or supply glad hand?
Choose one answer below.
A
Red
✓
B
Blue
✓
C
Green
✓
D
White
✓
QUESTION 10 / 25
What color is commonly used for the trailer service glad hand?
Choose one answer below.
A
Red
✓
B
Yellow
✓
C
Black
✓
D
Blue
✓
QUESTION 11 / 25
What is the kingpin?
Choose one answer below.
A
The trailer ABS lamp
✓
B
The service glad hand
✓
C
The vertical trailer pin that locks into the fifth wheel jaws
✓
D
The landing gear crank
✓
QUESTION 12 / 25
Before backing under a trailer, fifth wheel jaws should be:
Choose one answer below.
A
Covered by the electrical cable
✓
B
Open
✓
C
Closed
✓
D
Removed
✓
QUESTION 13 / 25
What does the tug test check?
Choose one answer below.
A
Whether the fifth wheel lock is holding the trailer
✓
B
Trailer marker lights only
✓
C
Cargo paperwork only
✓
D
Whether the landing gear is greased
✓
QUESTION 14 / 25
Why visually inspect after a tug test?
Choose one answer below.
A
To avoid testing trailer brakes
✓
B
Cargo paperwork only
✓
C
To set the odometer
✓
D
To confirm the jaws are closed around the kingpin and there is no gap
✓
QUESTION 15 / 25
What should be done with landing gear before driving?
Choose one answer below.
A
Remove it from the trailer
✓
B
Lower it until it drags
✓
C
Raise it fully and secure the handle
✓
D
Leave it halfway down
✓
QUESTION 16 / 25
What connects the tractor electrical system to trailer lights?
Choose one answer below.
A
The landing gear foot
✓
B
The electrical cable or light cord
✓
C
The fifth wheel release handle
✓
D
Use the trailer hand valve as the main control
✓
QUESTION 17 / 25
When unsure while backing, what should you do?
Choose one answer below.
A
Get out and look before continuing
✓
B
Speed up and make a sharp correction
✓
C
Use the trailer hand valve as the main control
✓
D
Assume the spot is clear
✓
QUESTION 18 / 25
When backing, the trailer initially moves how relative to steering wheel direction?
Choose one answer below.
A
Always straight back
✓
B
Only toward the passenger side
✓
C
In the direction of the turn signal
✓
D
Opposite the steering-wheel direction
✓
QUESTION 19 / 25
When a curved backing path is needed, which side is preferred when possible?
Choose one answer below.
A
Any side at high speed
✓
B
Only from outside the cab
✓
C
Driver side
✓
D
Blind passenger side
✓
QUESTION 20 / 25
What is a jackknife?
Choose one answer below.
A
The kingpin is painted red
✓
B
The tractor and trailer fold toward each other at the coupling
✓
C
Landing gear drops during travel
✓
D
Trailer lights flash quickly
✓
QUESTION 21 / 25
What should you do first if trailer wheels lock and the trailer starts to skid?
Choose one answer below.
A
Release the brakes so the wheels can roll again
✓
B
Use the trailer hand valve as the main control
✓
C
Use the parking brake for normal moving stops
✓
D
Accelerate sharply
✓
QUESTION 22 / 25
Which trailers are vulnerable at raised railroad crossings?
Choose one answer below.
A
Only passenger cars
✓
B
Only motorcycles
✓
C
Only empty pickup beds
✓
D
Low-slung trailers such as lowboys or car carriers
✓
QUESTION 23 / 25
What supports the front of an uncoupled semitrailer?
Choose one answer below.
A
Service line
✓
B
ABS lamp
✓
C
Landing gear
✓
D
Kingpin alone
✓
QUESTION 24 / 25
After uncoupling, what should be done with air and electrical lines?
Choose one answer below.
A
Cut them off
✓
B
Secure them so they are not damaged or contaminated
✓
C
Leave them dragging
✓
D
Tie them into fifth wheel jaws
✓
QUESTION 25 / 25
Which item is checked in the coupling area?
Choose one answer below.
A
Fifth wheel mounting and locking parts
✓
B
Trailer marker lights only
✓
C
Cargo paperwork only
✓
D
Radio volume knob
✓
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