US South Carolina DMV CDL Combination Vehicles Test 8

DMV & CDL » Category

Author: TestGru Team (Education Specialist)

20 questions · All questions on one page

Prepared with up-to-date content

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

What is a combination vehicle?

A) tractor plus trailer(s)

B) bus

C) van

D) single truck

Question 2

What is a converter dolly?

A) device coupling doubles

B) a light

C) a tool box

D) a spare tire

Question 3

How couple doubles?

A) front first always

B) no order

C) any order

D) rear trailer, dolly, front trailer in order

Question 4

What is the crack-the-whip effect?

A) tire pop

B) engine surge

C) rear trailer swings in turns

D) brake lock

Question 5

How prevent rollover in combos?

A) no need

B) slow well below curve speed

C) speed through

D) brake in curve

Question 6

What is off-tracking in combos?

A) tire brand

B) brake wear

C) rear follows shorter path

D) speeding

Question 7

How check coupling?

A) tire shine

B) paint check

C) fifth-wheel jaws locked, no gap

D) radio test

Question 8

What is trailer hand valve for?

A) fueling

B) testing trailer brakes only

C) lights

D) parking

Question 9

How test trailer emergency brakes?

A) visual only

B) no test

C) drive fast

D) charge, pull supply, tug test

Question 10

What is a shut-off valve for?

A) fuel flow

B) horn

C) controls air to rear in doubles

D) lights

Question 11

How many valves on last trailer?

A) one open

B) half open

C) all open

D) none open (all closed)

Question 12

What is the air line order?

A) one line enough

B) no lines

C) drive then connect

D) connect service+emergency before moving

Question 13

How inspect pintle hook?

A) rust fine

B) loose ok

C) latched, safety chains crossed

D) no chains

Question 14

What are safety chains for?

A) weight

B) noise

C) looks

D) backup coupling if hook fails

Question 15

How brake with empty trailers?

A) gentler (light trailers lock easily)

B) harder

C) same

D) no brakes

Question 16

What is trailers jackknifing?

A) tractor-trailer folds in skid

B) coupling step

C) turning wide

D) parking trick

Question 17

How avoid jackknife?

A) speed up

B) steady braking, no sudden moves

C) slam brakes

D) jerk wheel

Question 18

How handle doubles in wind?

A) stop in lane

B) ignore

C) slow, extra space, firm grip

D) speed up

Question 19

What is rearward amplification?

A) last trailer moves most

B) engine power

C) brake force

D) fuel use

Question 20

How lane change with doubles?

A) slower, more space, signal long

B) tailgate first

C) no signal

D) quick swerve

US South Carolina DMV CDL Combination Vehicles Test 8

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