?How much oil would you add to 20 liters of fuel for a 40:1 ratio?
A. ?250 milliliters
B. ?500 milliliters
C. ?1000 milliliters
D. ?100 milliliters
Answer: B
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The ____ pressure switch consists of a disk with convolutions around the edge.
a. sealed piston b. Bourdon tube c. diaphragm d. solid state
While power tools are in use, persons required to wear safety glasses or goggles are _____
a. only the operator b. all workers on the job c. workers in the tool vicinity d. everyone within 50 feet
When is the gas valve energized on an induced-draft furnace that uses hot surface ignition?
A) After the draft switch closes to prove the draft B) On the initial call for heat C) After the igniter has been energized D) At the same time the induced draft blower is energized
What is galvanic corrosion?
A) Corrosion due to oxidation and chemical attack B) Corrosion due to chemical incompatibility between the coil and the refrigerant C) Corrosion at the contact point of two types of metal in the presence of an electrolyte D) Corrosion due to attack by metal-eating organisms