Procedures for welding titanium alloys include:
A) Back purging B) Welding inside an argon filled chamber
C) Use of a gas lens D) All of the above
D
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____ specifications outline material selection and the construction operation process to be followed in providing construction materials and practices.
A. Reference standard B. Process C. Material D. Common
When is the gas valve energized on an induced-draft furnace that uses hot surface ignition?
A) At the same time the induced draft blower is energized B) After the igniter has been energized C) On the initial call for heat D) After the draft switch closes to prove the draft
To help prevent damaging the first winding, some circuits contain a timer that disconnects power to the motor if the second winding is not energized within a predetermined time. This timer is often called a(n) ____________________ timer.
Fill in the blank(s) with the appropriate word(s).
The rotation of a cam is not necessary to label on the diagram since they can move in either direction.
Answer the following statement true (T) or false (F)