Machine Elements, Materials, and Shop Practice

Study lessons

1. 1

   Screw Fasteners, Bolts, and Riveted Joints

   Work thread forms, bolt tensile stress and preload, power-screw torque and efficiency, and the shear, tearing, and crushing strength of riveted joints, each computed in SI units.

   15 min
2. 2

   Springs, Brakes, and Clutches

   Compute helical spring stress, deflection, and rate, block and band brake torque, and the friction torque of disk and cone clutches, each worked in SI units.

   15 min
3. 3

   Welded Joints and Pressure Vessels

   Size fillet and butt welds through the effective throat, then compute hoop and longitudinal stress in thin cylinders and spheres, with an introduction to thick-cylinder (Lame) stress, all in SI units.

   15 min
4. 4

   Engineering Materials

   Classify ferrous and nonferrous metals, read steel designations, apply heat treatment, interpret the tensile test and mechanical properties, and read the iron-carbon diagram.

   15 min
5. 5

   Tolerances, Allowances, and Fits

   Define limits, tolerance, and allowance, then classify clearance, interference, and transition fits, apply the hole-basis and shaft-basis systems, and check parts with GO and NO-GO gauges.

   15 min
6. 6

   Mechanisms, Shop Practice, and Engineering Drawing

   Work the kinematics of mechanisms and gear trains, count degrees of freedom, and recall the machining processes and drawing conventions the board tests, with SI worked examples.

   15 min

Section practice test

3 test sets covering the whole Machine Elements, Materials, and Shop Practice section, 90 original questions with explanations. After you finish the lessons above, prove it here. Randomized every run.