Logo TestGru USA
Home Categories Forum Login Support
This test is for educational purposes only. Our platform is not operated by the College Board, DMV, or any official government agency. For official exam information, visit the relevant agency websites.

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

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

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