US South Carolina DMV CDL Combination Vehicles 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 Combination DMV — South Carolina (USA, State Traffic Law) USA — South Carolina State DMV & FMCSA (MUTCD) — USA

What is this test? for South Carolina DMV Cdl Combination 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 Combination permit/CDL (16+, State DMV)
Section: DMV South Carolina — Cdl Combination · Education: High School & Adult (16+) · Part: DMV South Carolina — Cdl Combination · 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 is a combination vehicle?

A) single truck

B) bus

C) van

D) tractor plus trailer(s)

Question 2

In South Carolina, what is a converter dolly?

A) a spare tire

B) a tool box

C) a light

D) device coupling doubles

Question 3

In South Carolina, how couple doubles?

A) no order

B) rear trailer, dolly, front trailer in order

C) any order

D) front first always

Question 4

In South Carolina, what is the crack-the-whip effect?

A) brake lock

B) engine surge

C) tire pop

D) rear trailer swings in turns

Question 5

In South Carolina, how prevent rollover in combos?

A) speed through

B) no need

C) brake in curve

D) slow well below curve speed

Question 6

In South Carolina, what is off-tracking in combos?

A) rear follows shorter path

B) speeding

C) tire brand

D) brake wear

Question 7

In South Carolina, how check coupling?

A) radio test

B) fifth-wheel jaws locked, no gap

C) tire shine

D) paint check

Question 8

In South Carolina, what is trailer hand valve for?

A) lights

B) fueling

C) testing trailer brakes only

D) parking

Question 9

In South Carolina, how test trailer emergency brakes?

A) drive fast

B) visual only

C) charge, pull supply, tug test

D) no test

Question 10

In South Carolina, what is a shut-off valve for?

A) lights

B) horn

C) fuel flow

D) controls air to rear in doubles

Question 11

In South Carolina, how many valves on last trailer?

A) one open

B) none open (all closed)

C) all open

D) half open

Question 12

In South Carolina, what is the air line order?

A) no lines

B) connect service+emergency before moving

C) drive then connect

D) one line enough

Question 13

In South Carolina, how inspect pintle hook?

A) no chains

B) rust fine

C) loose ok

D) latched, safety chains crossed

Question 14

In South Carolina, what are safety chains for?

A) noise

B) weight

C) looks

D) backup coupling if hook fails

Question 15

In South Carolina, how brake with empty trailers?

A) harder

B) same

C) gentler (light trailers lock easily)

D) no brakes

Question 16

In South Carolina, what is trailers jackknifing?

A) coupling step

B) parking trick

C) turning wide

D) tractor-trailer folds in skid

Question 17

In South Carolina, how avoid jackknife?

A) jerk wheel

B) slam brakes

C) speed up

D) steady braking, no sudden moves

Question 18

In South Carolina, how handle doubles in wind?

A) speed up

B) ignore

C) slow, extra space, firm grip

D) stop in lane

Question 19

In South Carolina, what is rearward amplification?

A) engine power

B) last trailer moves most

C) fuel use

D) brake force

Question 20

In South Carolina, how lane change with doubles?

A) tailgate first

B) slower, more space, signal long

C) no signal

D) quick swerve

US South Carolina DMV CDL Combination Vehicles Test 1

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