US District Of Columbia DMV CDL Air Brakes 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 Air Brakes 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 Air Brakes 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 Air Brakes permit/CDL (16+, State DMV)
Section: DMV District Of Columbia — Cdl Air Brakes · Education: High School & Adult (16+) · Part: DMV District Of Columbia — Cdl Air Brakes · 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 powers air brakes?

A) electricity

B) springs only

C) hydraulic fluid

D) compressed air

Question 2

What is governor cut-in pressure?

A) 150 psi

B) 60 psi

C) 200 psi

D) about 100 psi (85-100 range)

Question 3

What is governor cut-out pressure?

A) 60 psi

B) about 125 psi (120-135 range)

C) 200 psi

D) 90 psi

Question 4

At what pressure does low-air warning activate?

A) at or before 60 psi (55-75 range)

B) 125 psi

C) 20 psi

D) 100 psi

Question 5

What are spring brakes?

A) service brakes

B) emergency/parking brakes applying on air loss

C) no brakes

D) steering brakes

Question 6

What is the dual air brake system?

A) steering only

B) no dual

C) two separate systems for safety

D) single only

Question 7

What must you do before driving after starting?

A) build pressure 100-125 psi and test

B) mirrors only

C) drive at 50 psi

D) no check

Question 8

What is brake lag in air brakes?

A) hydraulic only

B) instant action

C) no lag

D) delay between pedal and application

Question 9

What is the air loss limit (single vehicle)?

A) 1 psi per hour

B) no limit

C) no more than 3 psi per minute

D) 10 psi

Question 10

What is the air loss limit (combination)?

A) 3 psi per week

B) 10 psi

C) no limit

D) no more than 4 psi per minute

Question 11

How test air compressor?

A) visual only

B) honk test

C) no test

D) build 85 to 100 psi within 45 seconds

Question 12

How test the low-air warning?

A) disconnect buzzer

B) drive fast

C) ignore it

D) fan brakes down, warning by 60 psi

Question 13

How test spring brakes?

A) no test

B) drive test

C) ask mechanic

D) fan below 20-45 psi, parking knob pops

Question 14

What is a pre-trip air brake check order?

A) governor, warning, spring, leak, service

B) any order

C) drive first

D) no order

Question 15

What are slack adjusters?

A) fuel lines

B) steering parts

C) mirror arms

D) link pushrod to brake cam

Question 16

What is manual slack adjustment rule?

A) needs training; autos should not need it

B) daily manual

C) never check

D) anyone adjusts

Question 17

What is brake adjustment limit?

A) about 1 inch pushrod travel

B) half foot

C) 3 inches

D) no limit

Question 18

What are foundation brakes?

A) the wheel brake mechanisms

B) retarders

C) parking only

D) engine brakes

Question 19

What is an application pressure gauge?

A) shows service brake air used

B) oil gauge

C) fuel gauge

D) speedometer

Question 20

What are supply pressure gauges?

A) voltage

B) tire pressure

C) show tank air pressure

D) coolant

US District Of Columbia DMV CDL Air Brakes Test 8

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