US North Carolina DMV CDL Air Brakes Test 1

DMV & CDL » Category

Author: TestGru Team (Education Specialist)

20 questions · All questions on one page

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

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

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 North Carolina, what powers air brakes?

A) electricity

B) springs only

C) hydraulic fluid

D) compressed air

Question 2

In North Carolina, what is governor cut-in pressure?

A) 60 psi

B) 200 psi

C) about 100 psi (85-100 range)

D) 150 psi

Question 3

In North Carolina, what is governor cut-out pressure?

A) 90 psi

B) 200 psi

C) 60 psi

D) about 125 psi (120-135 range)

Question 4

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

A) 125 psi

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

C) 20 psi

D) 100 psi

Question 5

In North Carolina, what are spring brakes?

A) no brakes

B) service brakes

C) steering brakes

D) emergency/parking brakes applying on air loss

Question 6

In North Carolina, what is the dual air brake system?

A) no dual

B) steering only

C) single only

D) two separate systems for safety

Question 7

In North Carolina, what must you do before driving after starting?

A) no check

B) drive at 50 psi

C) mirrors only

D) build pressure 100-125 psi and test

Question 8

In North Carolina, what is brake lag in air brakes?

A) no lag

B) instant action

C) delay between pedal and application

D) hydraulic only

Question 9

In North Carolina, 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

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

A) no limit

B) 3 psi per week

C) 10 psi

D) no more than 4 psi per minute

Question 11

In North Carolina, how test air compressor?

A) honk test

B) visual only

C) no test

D) build 85 to 100 psi within 45 seconds

Question 12

In North Carolina, how test the low-air warning?

A) disconnect buzzer

B) drive fast

C) fan brakes down, warning by 60 psi

D) ignore it

Question 13

In North Carolina, how test spring brakes?

A) ask mechanic

B) no test

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

D) drive test

Question 14

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

A) governor, warning, spring, leak, service

B) no order

C) drive first

D) any order

Question 15

In North Carolina, what are slack adjusters?

A) mirror arms

B) steering parts

C) fuel lines

D) link pushrod to brake cam

Question 16

In North Carolina, what is manual slack adjustment rule?

A) needs training; autos should not need it

B) anyone adjusts

C) daily manual

D) never check

Question 17

In North Carolina, what is brake adjustment limit?

A) no limit

B) 3 inches

C) half foot

D) about 1 inch pushrod travel

Question 18

In North Carolina, what are foundation brakes?

A) the wheel brake mechanisms

B) retarders

C) engine brakes

D) parking only

Question 19

In North Carolina, what is an application pressure gauge?

A) fuel gauge

B) speedometer

C) shows service brake air used

D) oil gauge

Question 20

In North Carolina, what are supply pressure gauges?

A) coolant

B) tire pressure

C) show tank air pressure

D) voltage

US North Carolina DMV CDL Air Brakes Test 1

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