IICL Chassis Inspector Exam
FMSCA assumed regulatory authority over chassis operations from what previous administration? -
Federal Highway Administration (FHWA) in 1/1/2000
How far should locking pins protrude past the face of the rails? - Minimum of 1/4", exclusive of
the chamfered edges of pins
How long must BIT reports be retained? - At least 2 years
In ABS, what are the 2 main components of the wheel speed sensors? - (1) exciter, and (2) pickup
In ABS, what is an exciter? - A ring with notched teeth, also known as sensor ring, tooth wheel,
tone ring, and exciter.
In ABS, what is an pickup? - Commonly called "the sensor" which contains a wire coil/magnet
assembly, which generates pulses of electricity as teeth of the exciter pass in front of it.
In ABS, what is the function of the electronic control unit (ECU)? - Processes all ABS info and signal
functions. Receives and interprets voltage pulses generated by the sensor pickup as the exciter teeth
pass by, and uses this info to determine: (a) impending wheel lock, and (b) when/how to activate the
ABS modulator valves.
In ABS, what is the function of the modulator valves? - Regulate air pressure to the brakes during
ABS action. ECU commands mod valve to either change the air pressure to the brake chamber, or hold
the existing pressure.
Under USDOT rules, what are the requirements of ICC bumper measurements? - a) Must extend
to within 4" of max width of chassis, but not extend beyond side extremity
b) Must be within 12" of the rear extremity
, What are examples of securing devices? - Twistlocks, locking pins, index pins
What are FMCSA inspection requirements? - Each chassis must be inspected at least 1 per year
What are the 2 types of slider assemblies? - Sliding bogie and sliding frame (extendable)
What are the components of ABS? - electronic control unit (ECU), wheel speed sensors,
modulator valves, exciter rings
What are the components of the landing gear? - Landing leg brace (diagonal or cross brace),
landing legs, gear box, cross shaft, crank handle, crank handle retainer, sand shoes (or wheels), sand
shoe axle
What are the FMCSA record keeping requirements? - Motor carrier must retain the original copy
of report for 14 months following date of inspection. Drivers who receive docs must sign and the motor
carrier must maintain that receipt for 12 mos. from date of receipt.
What are the minimum inspection requirements for a BIT? - a) brake adjustment
b) brake system components and leaks
c) steering and suspension systems
d) tires and wheels
e) vehicle connecting devices (fifth wheels, kingpins, pintle hooks, etc.)
What are the restraining regulations for securing devices? - Must restrain a container from moving
more than 1/2" in any horizontal direction or 1" vertically while chassis is in motion
What bolt size and torque is required for slider hold down clips? - 5/8" hex head, grade 5 bolt with
90-120 lb-ft torque
FMSCA assumed regulatory authority over chassis operations from what previous administration? -
Federal Highway Administration (FHWA) in 1/1/2000
How far should locking pins protrude past the face of the rails? - Minimum of 1/4", exclusive of
the chamfered edges of pins
How long must BIT reports be retained? - At least 2 years
In ABS, what are the 2 main components of the wheel speed sensors? - (1) exciter, and (2) pickup
In ABS, what is an exciter? - A ring with notched teeth, also known as sensor ring, tooth wheel,
tone ring, and exciter.
In ABS, what is an pickup? - Commonly called "the sensor" which contains a wire coil/magnet
assembly, which generates pulses of electricity as teeth of the exciter pass in front of it.
In ABS, what is the function of the electronic control unit (ECU)? - Processes all ABS info and signal
functions. Receives and interprets voltage pulses generated by the sensor pickup as the exciter teeth
pass by, and uses this info to determine: (a) impending wheel lock, and (b) when/how to activate the
ABS modulator valves.
In ABS, what is the function of the modulator valves? - Regulate air pressure to the brakes during
ABS action. ECU commands mod valve to either change the air pressure to the brake chamber, or hold
the existing pressure.
Under USDOT rules, what are the requirements of ICC bumper measurements? - a) Must extend
to within 4" of max width of chassis, but not extend beyond side extremity
b) Must be within 12" of the rear extremity
, What are examples of securing devices? - Twistlocks, locking pins, index pins
What are FMCSA inspection requirements? - Each chassis must be inspected at least 1 per year
What are the 2 types of slider assemblies? - Sliding bogie and sliding frame (extendable)
What are the components of ABS? - electronic control unit (ECU), wheel speed sensors,
modulator valves, exciter rings
What are the components of the landing gear? - Landing leg brace (diagonal or cross brace),
landing legs, gear box, cross shaft, crank handle, crank handle retainer, sand shoes (or wheels), sand
shoe axle
What are the FMCSA record keeping requirements? - Motor carrier must retain the original copy
of report for 14 months following date of inspection. Drivers who receive docs must sign and the motor
carrier must maintain that receipt for 12 mos. from date of receipt.
What are the minimum inspection requirements for a BIT? - a) brake adjustment
b) brake system components and leaks
c) steering and suspension systems
d) tires and wheels
e) vehicle connecting devices (fifth wheels, kingpins, pintle hooks, etc.)
What are the restraining regulations for securing devices? - Must restrain a container from moving
more than 1/2" in any horizontal direction or 1" vertically while chassis is in motion
What bolt size and torque is required for slider hold down clips? - 5/8" hex head, grade 5 bolt with
90-120 lb-ft torque
