1. Unauthorized persons servicing equipment may jeopardize the safety of operators and others due to ___ of heavy equipment.
a. mechanical failure
b. incorrect classification
C. improper signaling
d. electrical designation

Burgers vector is generally parallel to the dislocation line. a)-true b)-false

Machinery that is a key part of the process and without which the plant or process cannot function is classifed as: (clo4) a)-critical machinery b)-essential machinery c)-general purpose machinery d)-none of the specified options.

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