US District Of Columbia DMV CDL Combination Vehicles Test 6

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

True or false in District Of Columbia: one type.

A) True

B) False

Question 2

True or false in District Of Columbia: visual only.

A) True

B) False

Question 3

True or false in District Of Columbia: fuel valve.

A) True

B) False

Question 4

True or false in District Of Columbia: with doubles.

A) True

B) False

Question 5

Which is correct about CDL combination vehicles in District Of Columbia?

A) bus

B) tractor plus trailer(s)

C) van

D) single truck

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) device coupling doubles

C) a spare tire

D) a light

Question 8

How couple doubles?

A) rear trailer, dolly, front trailer in order

B) any order

C) front first always

D) no order

Question 9

What is the crack-the-whip effect?

A) brake lock

B) rear trailer swings in turns

C) tire pop

D) engine surge

Question 10

How prevent rollover in combos?

A) brake in curve

B) slow well below curve speed

C) no need

D) speed through

Question 11

What is off-tracking in combos?

A) brake wear

B) rear follows shorter path

C) speeding

D) tire brand

Question 12

How check coupling?

A) fifth-wheel jaws locked, no gap

B) paint check

C) radio test

D) tire shine

Question 13

What is trailer hand valve for?

A) lights

B) parking

C) testing trailer brakes only

D) fueling

Question 14

How test trailer emergency brakes?

A) charge, pull supply, tug test

B) visual only

C) drive fast

D) no test

Question 15

What is a shut-off valve for?

A) horn

B) controls air to rear in doubles

C) fuel flow

D) lights

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) one line enough

B) no lines

C) drive then connect

D) connect service+emergency before moving

Question 18

How inspect pintle hook?

A) latched, safety chains crossed

B) loose ok

C) no chains

D) rust fine

Question 19

What are safety chains for?

A) looks

B) backup coupling if hook fails

C) noise

D) weight

Question 20

How brake with empty trailers?

A) harder

B) same

C) no brakes

D) gentler (light trailers lock easily)

US District Of Columbia DMV CDL Combination Vehicles Test 6

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