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MAE 454 –Quiz 4
September 29, 2023
The quiz is closed book and notes. You are not permitted to work or share your
responses with anyone.
Assume gravity acts vertically down. Place your responses in
the space provided. (100 points)
1. What is a purpose of a spring? (10 points)
To store and release energy. To provide a controlled force-displacement motion.
2. What types of stress are in the main coil of a helical coil compression spring? Provide
the individual stresses acting on the coil wire. (20 points)
Transverse shear and torsional shear.
3. What types of stress are in the hook of a helical coil extension spring? Provide the
individual stresses acting on the hook wire. (20 points)
Axial tensile and bending tensile.
4. What type of stress is in the main coil of a helical coil torsional spring? Provide the
individual stress acting on the coil wire. (10 points)
Bending tensile.
5. Identify a helical coil compression spring with a free length less than 5 inches, a
spring constant greater than 150 lb/in, and a compressed length greater than 2 inches.
See the catalog page on the back. (20 points)
Possible options include 9620K17, 9620K24, 9620K25, 9657K141, and 9657K144,
6. Identify a helical coil extension spring with a spring constant at least 150 lb/in and an
extended length greater than 3 inches. See the catalog page on the back. (20 points)
Possible options include 9654K599 and 5108N815.
