What are the safety precautions you must take when using a grinding wheel?
What will be an ideal response?
(1) Wear a face shield. (2) Always check the grinding wheel for cracks or damage before use. Do not
use a wheel that shows any sign of damage. (3) Be sure to use wheels that are designed for the
machine. (4) Tighten the wheel securely and carefully. (5) Never use a grinding wheel that is less than
one-half of its original diameter. (6) When preparing to grind small pieces, secure them in a vise, if
possible. (7) Do not grind metal in areas of combustible gases or materials. (8) Hold the machine with
both hands at all times. (9) Do not discharge sparks against persons, clothing, or other combustible
materials.
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Some circuit controls use a combination of a humidistat and a(n) ____.
a. sail switch b. ionizer c. hygrometer d. dehumidifier
Technician A says that post-2010 NG fueled commercial engines must be equipped with a DPF in the exhaust gas aftertreatment circuit. Technician B says that post-2010 NG fueled commercial engines are normally equipped with passive reduction and oxidation catalysts in the exhaust system. Who is correct??
A. ?Technician A only B. ?Technician B only C. ?Both A and B D. ?Neither A nor B
The ____________________ is the rotating part of the motor.
Fill in the blank(s) with the appropriate word(s).
What construction material can be used in high-temperature applications?
A) Alloys B) Copper C) Carbon steel D) Plastics