US District Of Columbia DMV CDL Combination Vehicles Test 1

DMV & CDL » Category

Author: TestGru Team (Education Specialist)

20 questions · All questions on one page

Prepared with up-to-date content

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

In District Of Columbia, what is a combination vehicle?

A) bus

B) tractor plus trailer(s)

C) single truck

D) van

Question 2

In District Of Columbia, what is a converter dolly?

A) device coupling doubles

B) a light

C) a spare tire

D) a tool box

Question 3

In District Of Columbia, how couple doubles?

A) front first always

B) any order

C) rear trailer, dolly, front trailer in order

D) no order

Question 4

In District Of Columbia, what is the crack-the-whip effect?

A) brake lock

B) rear trailer swings in turns

C) tire pop

D) engine surge

Question 5

In District Of Columbia, how prevent rollover in combos?

A) slow well below curve speed

B) speed through

C) no need

D) brake in curve

Question 6

In District Of Columbia, what is off-tracking in combos?

A) speeding

B) tire brand

C) rear follows shorter path

D) brake wear

Question 7

In District Of Columbia, how check coupling?

A) paint check

B) tire shine

C) radio test

D) fifth-wheel jaws locked, no gap

Question 8

In District Of Columbia, what is trailer hand valve for?

A) lights

B) parking

C) testing trailer brakes only

D) fueling

Question 9

In District Of Columbia, how test trailer emergency brakes?

A) visual only

B) no test

C) charge, pull supply, tug test

D) drive fast

Question 10

In District Of Columbia, what is a shut-off valve for?

A) controls air to rear in doubles

B) lights

C) fuel flow

D) horn

Question 11

In District Of Columbia, how many valves on last trailer?

A) one open

B) half open

C) all open

D) none open (all closed)

Question 12

In District Of Columbia, what is the air line order?

A) no lines

B) connect service+emergency before moving

C) one line enough

D) drive then connect

Question 13

In District Of Columbia, how inspect pintle hook?

A) no chains

B) loose ok

C) latched, safety chains crossed

D) rust fine

Question 14

In District Of Columbia, what are safety chains for?

A) backup coupling if hook fails

B) looks

C) weight

D) noise

Question 15

In District Of Columbia, how brake with empty trailers?

A) no brakes

B) harder

C) gentler (light trailers lock easily)

D) same

Question 16

In District Of Columbia, what is trailers jackknifing?

A) turning wide

B) parking trick

C) tractor-trailer folds in skid

D) coupling step

Question 17

In District Of Columbia, how avoid jackknife?

A) slam brakes

B) speed up

C) steady braking, no sudden moves

D) jerk wheel

Question 18

In District Of Columbia, how handle doubles in wind?

A) ignore

B) speed up

C) slow, extra space, firm grip

D) stop in lane

Question 19

In District Of Columbia, what is rearward amplification?

A) last trailer moves most

B) fuel use

C) engine power

D) brake force

Question 20

In District Of Columbia, how lane change with doubles?

A) tailgate first

B) no signal

C) slower, more space, signal long

D) quick swerve

US District Of Columbia DMV CDL Combination Vehicles Test 1

Test Complete

About This Test