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US Texas DMV CDL Combination Vehicles Test 6

DMV & CDL » Category

Author: TestGru Team (Education Specialist)

20 questions · All questions on one page

Prepared with up-to-date content
DMV Texas — Cdl Combination DMV — Texas (USA, State Traffic Law) USA — Texas State DMV & FMCSA (MUTCD) — USA
What is this test? for Texas DMV Cdl Combination permit/CDL, USA (MUTCD) — DMV — Texas (USA, State Traffic Law) level, USA — Texas.
Is this for you? For driver candidates in Texas, USA — Cdl Combination permit/CDL (16+, State DMV)
Section: DMV Texas — Cdl Combination · Education: High School & Adult (16+) · Part: DMV Texas — Cdl Combination · Country: USA · Region: USA — Texas

The DMV written test is an important step measuring driver candidates' knowledge of traffic laws, first aid, and vehicle technology.

This test reinforces your theoretical knowledge and provides the fundamentals needed to pass the exam and become a safe driver.

By solving this test of 20 questions, you can both test your knowledge and identify the topics you need to improve.

Question 1
True or false in Texas: one type.
A) True
B) False
Question 2
True or false in Texas: visual only.
A) True
B) False
Question 3
True or false in Texas: fuel valve.
A) True
B) False
Question 4
True or false in Texas: with doubles.
A) True
B) False
Question 5
Which is correct about CDL combination vehicles in Texas?
A) tractor plus trailer(s)
B) single truck
C) van
D) bus
Question 6
What is a combination vehicle?
A) bus
B) tractor plus trailer(s)
C) van
D) single truck
Question 7
What is a converter dolly?
A) a light
B) a spare tire
C) device coupling doubles
D) a tool box
Question 8
How couple doubles?
A) rear trailer, dolly, front trailer in order
B) no order
C) any order
D) front first always
Question 9
What is the crack-the-whip effect?
A) engine surge
B) rear trailer swings in turns
C) brake lock
D) tire pop
Question 10
How prevent rollover in combos?
A) brake in curve
B) speed through
C) slow well below curve speed
D) no need
Question 11
What is off-tracking in combos?
A) tire brand
B) speeding
C) rear follows shorter path
D) brake wear
Question 12
How check coupling?
A) tire shine
B) paint check
C) radio test
D) fifth-wheel jaws locked, no gap
Question 13
What is trailer hand valve for?
A) parking
B) testing trailer brakes only
C) fueling
D) lights
Question 14
How test trailer emergency brakes?
A) charge, pull supply, tug test
B) no test
C) visual only
D) drive fast
Question 15
What is a shut-off valve for?
A) horn
B) lights
C) controls air to rear in doubles
D) fuel flow
Question 16
How many valves on last trailer?
A) none open (all closed)
B) half open
C) one open
D) all open
Question 17
What is the air line order?
A) no lines
B) drive then connect
C) connect service+emergency before moving
D) one line enough
Question 18
How inspect pintle hook?
A) latched, safety chains crossed
B) rust fine
C) no chains
D) loose ok
Question 19
What are safety chains for?
A) noise
B) backup coupling if hook fails
C) weight
D) looks
Question 20
How brake with empty trailers?
A) same
B) gentler (light trailers lock easily)
C) no brakes
D) harder

About This Test

For Drivers 16+ & CDL (USA, 51 States × 9 Topics) — State DMV permit and CDL General, Air Brakes, Combination, HazMat and Tanker per MUTCD & FMCSA state law. Section: DMV & CDL, USA.

DMV & CDL USA — 51 States (incl. DC) × 9 topics = 4,400+ tests: Road Signs (MUTCD), Traffic Laws, First Aid, Vehicle Technique, Motorcycle, CDL General Knowledge, Air Brakes, Combination, HazMat. State traffic law + FMCSA. 8×20Q per state-topic.

DMV Forum: no toxic driving shaming; respect first — auto-moderation → (content hidden) for profanity/insults in topics & replies.

Study Tips:

  • Study your state manual first
  • Master signs before laws
  • Do motorcycle/CDL separately
  • Drive kind — Forum kind