Vehicle Modifications & Driving Assessment Flashcards
7 cards from real CMC practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 7 Vehicle Modifications & Driving Assessment flashcards as text
A fold-out ramp on a minivan fails to deploy fully in cold weather. The most likely cause is:
Answer: Low battery voltage reducing motor torque
Cold weather reduces battery capacity and output voltage, which can reduce motor torque enough to prevent full ramp deployment.
The maximum slope angle for a vehicle entry ramp under ADA/ANSI accessibility guidelines for self-propelling manual wheelchair users is approximately:
Answer: 1:6 (9.5 degrees)
A 1:6 slope ratio (approximately 9.5 degrees) is the generally accepted maximum for power-assisted or self-propelling entry ramps in vehicle applications.
When installing a secondary electronic hand control that interfaces with the vehicle's CAN bus, the installer must verify:
Answer: The ECU software version compatibility with the aftermarket control unit
CAN bus-interfacing adaptive controls must be verified for ECU software version compatibility to prevent control conflicts or unintended vehicle behavior.
A four-point tie-down system uses 'S'-hooks to attach to the wheelchair frame. According to WC-19/SAE J2249 guidelines, the preferred attachment method is:
Answer: S-hooks attached to designated crash-tested securement points on the wheelchair frame
SAE J2249 requires securement to designated, crash-tested attachment points on WC-19 compliant wheelchairs to ensure load is transmitted safely.
A client's power wheelchair measures 28 inches wide and 48 inches long. When evaluating a modified minivan for transport compatibility, the CMC should verify the vehicle's:
Answer: All of the above
Compatibility assessment requires verifying door/ramp width, weight ratings, tie-down spacing, and headroom simultaneously to ensure safe and functional access.
After a lowered-floor minivan conversion, the vehicle's center of gravity has shifted. The CMC should advise the client that this most directly affects:
Answer: Handling characteristics during rapid lane changes or turns
Lowering the floor and adding a heavy ramp/lift mechanism alters the vehicle's mass distribution, affecting stability and handling during dynamic maneuvers.
Which federal regulation requires that adaptive driving equipment not impair the function of any original vehicle safety system?
Answer: 49 CFR Part 595
49 CFR Part 595 governs motor vehicle alterations by final stage manufacturers and prohibits modifications that render original safety systems inoperative.