The relative compaction of a clayey sand in the field is 90%. The maximum and minimum dry unit weights of the sand are 115 lb/ft3 and 93 lb/ft3, respec- tively. Determine: a. Dry unit weight in the field b. Relative density of compaction c. Moist unit weight at a moisture content of 18%

Abrake has a normal braking torque of 2.8 kip in and heat-dissipating cast-iron surfaces whose mass is 40 lbm. suppose a load is brought to rest in 8.0 s from an initial angular speed of 1600 rev/min using the normal braking torque; estimate the temperature rise of the heat dissipating surfaces.

Vibration monitoring this technique uses the noise or vibration created by mechanical equipment and in seme cases by plant systems to detemine their actual condtion. a)- true b)- false

Inspection for bearing condition will include: (clo4) a)-color b)-smell c)-size d)-none of the above