US Illinois DMV CDL Air Brakes Test 1

DMV & CDL » Category

Author: TestGru Team (Education Specialist)

20 questions · All questions on one page

Prepared with up-to-date content

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

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

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 Illinois, what powers air brakes?

A) springs only

B) compressed air

C) hydraulic fluid

D) electricity

Question 2

In Illinois, what is governor cut-in pressure?

A) 150 psi

B) 200 psi

C) about 100 psi (85-100 range)

D) 60 psi

Question 3

In Illinois, what is governor cut-out pressure?

A) 200 psi

B) 60 psi

C) 90 psi

D) about 125 psi (120-135 range)

Question 4

In Illinois, at what pressure does low-air warning activate?

A) 125 psi

B) 20 psi

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

D) 100 psi

Question 5

In Illinois, what are spring brakes?

A) emergency/parking brakes applying on air loss

B) no brakes

C) steering brakes

D) service brakes

Question 6

In Illinois, what is the dual air brake system?

A) no dual

B) steering only

C) two separate systems for safety

D) single only

Question 7

In Illinois, what must you do before driving after starting?

A) drive at 50 psi

B) no check

C) build pressure 100-125 psi and test

D) mirrors only

Question 8

In Illinois, what is brake lag in air brakes?

A) hydraulic only

B) delay between pedal and application

C) instant action

D) no lag

Question 9

In Illinois, what is the air loss limit (single vehicle)?

A) no limit

B) 1 psi per hour

C) no more than 3 psi per minute

D) 10 psi

Question 10

In Illinois, what is the air loss limit (combination)?

A) no limit

B) 3 psi per week

C) no more than 4 psi per minute

D) 10 psi

Question 11

In Illinois, how test air compressor?

A) visual only

B) build 85 to 100 psi within 45 seconds

C) honk test

D) no test

Question 12

In Illinois, how test the low-air warning?

A) drive fast

B) disconnect buzzer

C) fan brakes down, warning by 60 psi

D) ignore it

Question 13

In Illinois, how test spring brakes?

A) no test

B) drive test

C) ask mechanic

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

Question 14

In Illinois, what is a pre-trip air brake check order?

A) governor, warning, spring, leak, service

B) any order

C) no order

D) drive first

Question 15

In Illinois, what are slack adjusters?

A) link pushrod to brake cam

B) steering parts

C) mirror arms

D) fuel lines

Question 16

In Illinois, what is manual slack adjustment rule?

A) never check

B) daily manual

C) needs training; autos should not need it

D) anyone adjusts

Question 17

In Illinois, what is brake adjustment limit?

A) half foot

B) about 1 inch pushrod travel

C) 3 inches

D) no limit

Question 18

In Illinois, what are foundation brakes?

A) the wheel brake mechanisms

B) parking only

C) engine brakes

D) retarders

Question 19

In Illinois, what is an application pressure gauge?

A) shows service brake air used

B) fuel gauge

C) oil gauge

D) speedometer

Question 20

In Illinois, what are supply pressure gauges?

A) coolant

B) tire pressure

C) voltage

D) show tank air pressure

US Illinois DMV CDL Air Brakes Test 1

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