US District Of Columbia DMV CDL Combination Vehicles Test 8

DMV & CDL » Category

Author: TestGru Team (Education Specialist)

20 questions · All questions on one page

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DMV District Of Columbia — Cdl Combination DMV — District Of Columbia (USA, State Traffic Law) USA — District Of Columbia State DMV & FMCSA (MUTCD) — USA

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

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

What is a combination vehicle?

A) van

B) single truck

C) tractor plus trailer(s)

D) bus

Question 2

What is a converter dolly?

A) a light

B) a spare tire

C) device coupling doubles

D) a tool box

Question 3

How couple doubles?

A) no order

B) rear trailer, dolly, front trailer in order

C) front first always

D) any order

Question 4

What is the crack-the-whip effect?

A) brake lock

B) engine surge

C) tire pop

D) rear trailer swings in turns

Question 5

How prevent rollover in combos?

A) brake in curve

B) no need

C) speed through

D) slow well below curve speed

Question 6

What is off-tracking in combos?

A) rear follows shorter path

B) tire brand

C) speeding

D) brake wear

Question 7

How check coupling?

A) radio test

B) paint check

C) fifth-wheel jaws locked, no gap

D) tire shine

Question 8

What is trailer hand valve for?

A) fueling

B) parking

C) lights

D) testing trailer brakes only

Question 9

How test trailer emergency brakes?

A) charge, pull supply, tug test

B) drive fast

C) visual only

D) no test

Question 10

What is a shut-off valve for?

A) lights

B) fuel flow

C) controls air to rear in doubles

D) horn

Question 11

How many valves on last trailer?

A) none open (all closed)

B) one open

C) all open

D) half open

Question 12

What is the air line order?

A) connect service+emergency before moving

B) one line enough

C) drive then connect

D) no lines

Question 13

How inspect pintle hook?

A) rust fine

B) no chains

C) latched, safety chains crossed

D) loose ok

Question 14

What are safety chains for?

A) noise

B) looks

C) weight

D) backup coupling if hook fails

Question 15

How brake with empty trailers?

A) no brakes

B) gentler (light trailers lock easily)

C) same

D) harder

Question 16

What is trailers jackknifing?

A) turning wide

B) parking trick

C) tractor-trailer folds in skid

D) coupling step

Question 17

How avoid jackknife?

A) slam brakes

B) steady braking, no sudden moves

C) speed up

D) jerk wheel

Question 18

How handle doubles in wind?

A) speed up

B) ignore

C) slow, extra space, firm grip

D) stop in lane

Question 19

What is rearward amplification?

A) brake force

B) fuel use

C) engine power

D) last trailer moves most

Question 20

How lane change with doubles?

A) quick swerve

B) no signal

C) tailgate first

D) slower, more space, signal long

US District Of Columbia DMV CDL Combination Vehicles Test 8

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