Welders must maintain a short arc when welding stainless steel to limit atmospheric contamination, which
causes _____.
a. corrosion
b. flexibility
c. hardness
d. porosity
d
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Dimensions on drawings for weld fabrication operations are generally shown as ____ dimensions.
A. decimal B. whole number C. fractional D. interval
Answer the following statement(s) true (T) or false (F)
1. The overload unit contacts are connected in parallel with the motor starter contactor unit control coil. 2. Electronic type of thermal overload units are adjustable for a range of motor load currents, and are set for the full load amperes (FLA) of the specific motor load. 3. When the melting alloy is a solid, the shaft of the ratchet wheel is held from turning. 4. When the bimetallic strip is heated, the metal with the lower thermal expansion characteristic will become longer, and cause the metal strip to bend.
A cold frame with a heat source is called a:
a. hot frame c. hotbed b. warm house d. warming shed
The very first control systems were used to start and stop the various components.
Answer the following statement true (T) or false (F)