Take NH CDL General Knowledge Practice Questions - New Hampshire CDL General Knowledge Test Exam

QUESTION 1 / 25

When performing a pre-trip inspection, the driver should ensure that the steering wheel free play (lash) does not exceed what limit?

Choose one answer below.

A5 degrees in either direction✓B10 degrees in either direction (approximately 2 inches on a 20-inch wheel)✓C15 degrees in either direction✓D20 degrees in either direction✓

QUESTION 2 / 25

During the cab check portion of a pre-trip inspection, you should test the parking brake by:

Choose one answer below.

ADriving forward slowly and applying the parking brake✓BPutting the vehicle in gear with the parking brake set and gently pressing the accelerator to see if the vehicle holds✓CVisually checking that the parking brake handle is in the correct position✓DChecking the parking brake cable under the vehicle✓

QUESTION 3 / 25

Which emergency equipment is required to be on a commercial motor vehicle?

Choose one answer below.

AFire extinguisher, spare fuses, and three red reflective triangles✓BFirst aid kit, fire extinguisher, and flares only✓CFire extinguisher and road flares only✓DSpare tire, jack, and reflective vest✓

QUESTION 4 / 25

A post-trip inspection report is important because:

Choose one answer below.

AIt is only required for vehicles carrying hazardous materials✓BIt alerts the carrier to vehicle defects that may need repair before the vehicle is driven again✓CIt replaces the need for the next driver to do a pre-trip inspection✓DIt is optional but recommended by the FMCSA✓

QUESTION 5 / 25

Which of the following is an out-of-service condition that would prevent a vehicle from being driven?

Choose one answer below.

AA small crack in the windshield that does not obstruct the driver's view✓BA missing mud flap on a rear wheel✓CBrake lining thickness below the minimum allowed by regulations✓DA broken antenna on the CB radio✓

QUESTION 6 / 25

During the pre-trip inspection, which of the following should a driver check regarding the exhaust system?

Choose one answer below.

AOnly that the muffler is present✓BThat the exhaust system is secure, not leaking, and not in contact with fuel lines, wiring, or air lines✓COnly that exhaust fumes are not entering the cab✓DThat the catalytic converter is functioning properly by checking emissions color✓

QUESTION 7 / 25

What is the minimum tread depth required for steer axle tires on a commercial motor vehicle?

Choose one answer below.

A2/32 of an inch✓B4/32 of an inch✓C6/32 of an inch✓D1/32 of an inch✓

QUESTION 8 / 25

What is the minimum tread depth required for tires on drive and trailer axle positions?

Choose one answer below.

A4/32 of an inch✓B2/32 of an inch✓C6/32 of an inch✓D1/32 of an inch✓

QUESTION 9 / 25

When inspecting slack adjusters on an S-cam brake system, the pushrod stroke at the brake chamber should not exceed what general limit?

Choose one answer below.

A1/2 inch✓B1 inch✓CThe adjustment limit varies by chamber size, but generally should not exceed about 2 inches✓D4 inches✓

QUESTION 10 / 25

During a tire inspection, you notice a bulge on the sidewall of one of the steer tires. What should you do?

Choose one answer below.

AContinue driving but avoid high speeds✓BHave the tire replaced before driving the vehicle✓CRotate the tire to a non-steer position✓DReduce air pressure to alleviate the bulge✓

QUESTION 11 / 25

What is the purpose of the brake drum inspection during a pre-trip?

Choose one answer below.

ATo check if the drums are painted correctly✓BTo look for cracks, broken welds, or holes and to check that the drum is not contaminated with oil or grease✓CTo measure the exact diameter of the drum with calipers✓DTo verify the brand of the brake drum✓

QUESTION 12 / 25

When checking air brake lines during a pre-trip inspection, the driver should look for:

Choose one answer below.

ALines that are properly color-coded only✓BCuts, cracks, abrasion damage, and that lines are properly secured and not in contact with hot surfaces✓COnly whether the lines are connected at both ends✓DWhether the lines are made of rubber or metal✓

QUESTION 13 / 25

When should you place your reflective triangles after stopping on the road due to a breakdown?

Choose one answer below.

AWithin 30 minutes of stopping✓BWithin 10 minutes of stopping✓COnly if it is dark outside✓DOnly on highways with speed limits over 55 mph✓

QUESTION 14 / 25

How should you adjust your mirrors on a commercial motor vehicle?

Choose one answer below.

ASo you can see only the road behind you✓BSo you can see just a small portion of the trailer body along with the road behind and to the sides✓CSo you can see only the trailer doors✓DMirrors only need adjustment when pulling a new trailer✓

QUESTION 15 / 25

Which types of lights must be checked during a pre-trip inspection?

Choose one answer below.

AOnly headlights and tail lights✓BHeadlights (high and low beam), tail lights, brake lights, turn signals, four-way flashers, clearance/marker lights, and identification lights✓COnly the lights that face forward✓DOnly brake lights and turn signals✓

QUESTION 16 / 25

What is the difference between flat (plane) mirrors and convex mirrors on a commercial motor vehicle?

Choose one answer below.

AThey function identically but are different shapes✓BFlat mirrors provide an accurate image while convex mirrors provide a wider field of view but make objects appear farther away than they actually are✓CConvex mirrors provide an accurate image while flat mirrors distort distances✓DConvex mirrors are only used on the passenger side✓

QUESTION 17 / 25

Clearance lights on a commercial motor vehicle serve what primary purpose?

Choose one answer below.

ATo illuminate the road directly in front of the vehicle✓BTo indicate the overall width and height of the vehicle to other drivers, especially at night✓CTo signal lane changes✓DTo provide lighting inside the cargo area✓

QUESTION 18 / 25

How often should a driver check their mirrors while driving a commercial motor vehicle?

Choose one answer below.

AEvery 30 seconds✓BEvery 5 to 8 seconds✓COnly when changing lanes✓DEvery 2 minutes✓

QUESTION 19 / 25

What is the proper technique for shifting gears in a commercial motor vehicle with a manual transmission (double clutching)?

Choose one answer below.

APress the clutch, shift to neutral, release the clutch, press the clutch again, shift to the next gear, release the clutch✓BHold the clutch down while moving through each gear✓CShift without using the clutch at any time✓DPress the clutch once and move the shifter directly to the next gear✓

QUESTION 20 / 25

When driving a commercial motor vehicle with a manual transmission, what is progressive shifting?

Choose one answer below.

AShifting through every gear in sequence regardless of speed✓BShifting at lower RPMs as road speed increases to improve fuel economy and reduce engine wear✓CSkipping gears while shifting up✓DShifting at the highest RPM in every gear for maximum power✓

QUESTION 21 / 25

What is "off-tracking" when driving a commercial vehicle through a turn?

Choose one answer below.

AWhen the vehicle drifts out of its lane on a straight road✓BWhen the rear wheels follow a shorter path (closer to the inside of the curve) than the front wheels✓CWhen the trailer fishtails on slippery roads✓DWhen the steering wheel locks during a turn✓

QUESTION 22 / 25

When turning right with a large commercial vehicle, the correct technique is to:

Choose one answer below.

ATurn tightly to stay as close to the curb as possible✓BSwing wide to the left before turning right to give the rear wheels room to clear the corner✓CKeep the front wheels close to the right curb and allow the trailer to track over the curb✓DStop in the intersection and wait for all traffic to clear✓

QUESTION 23 / 25

What does countersteering mean?

Choose one answer below.

ATurning the steering wheel in the direction opposite to the way you want to go✓BTurning the steering wheel back toward straight ahead after completing a turn to prevent oversteering✓CSteering with one hand while braking with the other✓DSteering the vehicle in reverse✓

QUESTION 24 / 25

A vehicle with a high center of gravity is more likely to:

Choose one answer below.

AHave better traction in wet conditions✓BRoll over when taking curves or making lane changes✓CStop more quickly✓DBe easier to steer✓

QUESTION 25 / 25

When should a driver downshift?

Choose one answer below.

AAfter the vehicle has already slowed down significantly✓BBefore starting down a hill, so the engine can help control speed✓COnly when the engine stalls✓DWhile the vehicle is stopped at a traffic light✓