Workbook, Heavy Duty Truck Systems, 6E
Chapter Thirty-Two – Answer Key
1. Heavy-duty Class 8 trucks use tempered steel-alloy frame rails with a yield strength
rating of:
2. Which of the following best defines the term section modulus (SM)?
3. What will be the effect of adding cross-members to a heavy-duty truck ladder-type frame
rail?
4. Which of the following methods will determine exactly what the frame material is for
purposes of repair and modification?
5. Technician A says that when using an L reinforcement to a frame rail following a repair,
the SM is changed. Technician B says that a fishplate L or inverted L reinforcement of a
frame rail results in an increase in RBM. Who is correct?
6. Damage to a tractor chassis frame may be an indication of overloading the vehicle.
Overloading can be caused by any of the following except:
7. All of the following are correct procedures to be observed when drilling holes in a heavy-
duty tempered frame rail except:
8. Technician A says that when using U-bolts and clamps to fasten vehicle bodies to a
tempered frame rail, steel pads should be welded to the side rail flanges. Technician B
notches frame side rail flanges in order to obtain a perfect U-bolt fit. Who is correct?
9. Which of the following are correct statements about RBM?
10. When diagnosing a suspected frame misalignment condition on a tractor, which would be
the correct sequence in which to perform the following checks?