Basic vehicle technologies 2: chassis Exam Questions And Answers

How does Active Trace Control help enhance steering response? - ANS Uses Vehicle Dynamic Control to selectively apply brake pressure What are the advantages of disc brakes compared to drum brakes? - ANS Brake pads wipe water away from the rotor as it spins Dissipate heat more rapidly Provide more effective stopping action How do drum brakes work? - ANS Hydraulic pressure through wheel cylinders forces brake shoes against drum What do stabilizer bars do? - ANS Transfer force from one side of the body to the other Help keep the vehicle level during cornering Link the left and right sides of the suspension together What's the purpose of benchmarking in the vehicle manufacturing process? - ANS Manufacturers set standards by which they will judge their own new vehicle Identify competitive strengths and weaknesses of competitive vehicles Which one of the following designates the highest tire speed rating in the U.S.? - ANS (Y) over 186 mph What are the advantages of an Anti-lock Braking System (ABS)? - ANS Provides driver with steering control, even under hazardous conditions Applies and releases brakes many times per second Helps prevent wheel lockup What's the benefit of an independent multi-link suspension? - ANS Separates springs and shocks to reduce friction Keeps tires perpendicular to the ground for optimum traction What does the structural rigidity of a chassis affect? - ANS Reduces squeaks and rattles caused by chassis flex Allows the body's crumple zones to absorb impact energy in a controlled manner Contributes to noise reduction What are the advantages of weld-bonding? - ANS Improves rigidity and durability of the passenger compartment Unibody structures will remain quiet and noise-free for years to come Structural adhesives and spot-welding provide structural strength Which vehicles should not be flat towed with all four wheels on the ground? - ANS Those with an automatic transmission What does Active Ride Control do? - ANS Automatically adjusts throttle and applies brakes on rough roads Uses brake pressure to decrease the amount of pitching that follows a bump What does Active Understeer Control do? - ANS Uses Vehicle Dynamic Control to gently apply the brakes to the inside wheels Makes it easier for the vehicle to follow the course the driver intends What are the features of power steering? - ANS Includes speed-sensitive function for ease of steering Reduces steering effort, especially in low-speed turns and parking maneuvers What are the advantages of electric power-assisted steering? - ANS Varies the amount of power assist based on vehicle speed Compact design allows for a smaller engine bay How do soft-mount suspension subframes improve ride comfort? - ANS By absorbing impacts from the road without flexing during cornering or braking How do run-flat tires work? - ANS Use reinforced sidewalls to support vehicle weight if there's loss of air pressure How does rack-and-pinion steering provide excellent feedback and precise control? - ANS By providing a direct connection between all parts of the steering system What does a spray-on bedliner do? - ANS Provides more protection than a drop-in bedliner Why are Nissan vehicles designed to understeer? - ANS A limited amount can make a vehicle's handling easier for the driver to predict What does an independent strut front suspension do? - ANS Provides excellent durability and takes up little space Provides the most comfortable ride on a wide variety of road surfaces Combines a coil spring and shock absorber/strut into one unit What does electronically driven hydraulic power steering do? - ANS Enhances fuel efficiency because it does not depend on engine power Uses electricity instead of engine power to run the steering pump What three functions should tire tread design provide on a wet surface? - ANS Provide the actual grip