US Oregon DMV CDL Air Brakes Test 8

DMV & CDL » Category

Author: TestGru Team (Education Specialist)

20 questions · All questions on one page

Prepared with up-to-date content

DMV Oregon — Cdl Air Brakes DMV — Oregon (USA, State Traffic Law) USA — Oregon State DMV & FMCSA (MUTCD) — USA

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

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) compressed air

B) hydraulic fluid

C) springs only

D) electricity

Question 2

What is governor cut-in pressure?

A) 150 psi

B) 200 psi

C) 60 psi

D) about 100 psi (85-100 range)

Question 3

What is governor cut-out pressure?

A) about 125 psi (120-135 range)

B) 200 psi

C) 90 psi

D) 60 psi

Question 4

At what pressure does low-air warning activate?

A) 125 psi

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

C) 100 psi

D) 20 psi

Question 5

What are spring brakes?

A) no brakes

B) emergency/parking brakes applying on air loss

C) service brakes

D) steering brakes

Question 6

What is the dual air brake system?

A) single only

B) steering only

C) no dual

D) two separate systems for safety

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) instant action

B) no lag

C) delay between pedal and application

D) hydraulic only

Question 9

What is the air loss limit (single vehicle)?

A) no limit

B) 10 psi

C) 1 psi per hour

D) no more than 3 psi per minute

Question 10

What is the air loss limit (combination)?

A) no more than 4 psi per minute

B) 3 psi per week

C) 10 psi

D) no limit

Question 11

How test air compressor?

A) build 85 to 100 psi within 45 seconds

B) no test

C) visual only

D) honk test

Question 12

How test the low-air warning?

A) fan brakes down, warning by 60 psi

B) drive fast

C) disconnect buzzer

D) ignore it

Question 13

How test spring brakes?

A) drive test

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

C) no test

D) ask mechanic

Question 14

What is a pre-trip air brake check order?

A) any order

B) no order

C) governor, warning, spring, leak, service

D) drive first

Question 15

What are slack adjusters?

A) mirror arms

B) steering parts

C) fuel lines

D) link pushrod to brake cam

Question 16

What is manual slack adjustment rule?

A) anyone adjusts

B) needs training; autos should not need it

C) never check

D) daily manual

Question 17

What is brake adjustment limit?

A) 3 inches

B) half foot

C) no limit

D) about 1 inch pushrod travel

Question 18

What are foundation brakes?

A) parking only

B) retarders

C) the wheel brake mechanisms

D) engine brakes

Question 19

What is an application pressure gauge?

A) speedometer

B) shows service brake air used

C) fuel gauge

D) oil gauge

Question 20

What are supply pressure gauges?

A) tire pressure

B) voltage

C) coolant

D) show tank air pressure

US Oregon DMV CDL Air Brakes Test 8

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