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

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

A) compressed air

B) springs only

C) hydraulic fluid

D) electricity

Question 2

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

A) 60 psi

B) about 100 psi (85-100 range)

C) 150 psi

D) 200 psi

Question 3

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

A) 60 psi

B) about 125 psi (120-135 range)

C) 90 psi

D) 200 psi

Question 4

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

A) 20 psi

B) 125 psi

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

D) 100 psi

Question 5

In South Carolina, what are spring brakes?

A) service brakes

B) steering brakes

C) no brakes

D) emergency/parking brakes applying on air loss

Question 6

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

A) two separate systems for safety

B) steering only

C) single only

D) no dual

Question 7

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

A) no check

B) drive at 50 psi

C) build pressure 100-125 psi and test

D) mirrors only

Question 8

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

A) no lag

B) hydraulic only

C) delay between pedal and application

D) instant action

Question 9

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

A) 1 psi per hour

B) 10 psi

C) no limit

D) no more than 3 psi per minute

Question 10

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

A) 3 psi per week

B) no limit

C) 10 psi

D) no more than 4 psi per minute

Question 11

In South Carolina, how test air compressor?

A) no test

B) build 85 to 100 psi within 45 seconds

C) visual only

D) honk test

Question 12

In South Carolina, 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

In South Carolina, how test spring brakes?

A) no test

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

C) ask mechanic

D) drive test

Question 14

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

A) any order

B) drive first

C) no order

D) governor, warning, spring, leak, service

Question 15

In South Carolina, what are slack adjusters?

A) link pushrod to brake cam

B) mirror arms

C) steering parts

D) fuel lines

Question 16

In South Carolina, what is manual slack adjustment rule?

A) never check

B) anyone adjusts

C) daily manual

D) needs training; autos should not need it

Question 17

In South Carolina, what is brake adjustment limit?

A) about 1 inch pushrod travel

B) half foot

C) 3 inches

D) no limit

Question 18

In South Carolina, what are foundation brakes?

A) engine brakes

B) parking only

C) the wheel brake mechanisms

D) retarders

Question 19

In South Carolina, what is an application pressure gauge?

A) oil gauge

B) shows service brake air used

C) fuel gauge

D) speedometer

Question 20

In South Carolina, what are supply pressure gauges?

A) coolant

B) voltage

C) tire pressure

D) show tank air pressure

US South Carolina DMV CDL Air Brakes Test 1

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