List two examples of situations where disconnecting the power to perform electrical work may create an additional or increased hazard.________________________________________________________________________
What will be an ideal response?
Life support equipment
Emergency alarm systems
Ventilation systems in hazardous locations
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Why is backseating a manual service valve when installing a gauge manifold necessary?
A) So that there is no pressure on the gauge port B) So that coolant is not lost C) So that the middle leg is opened D) So that no gauge ports are opened
When testing combustion efficiency, the technician should measure:
A) Oil pump pressure, stack temperature, ambient temperature, and CO2 flue gas percentage. B) Stack temperature, flue gas density, and flue gas water percentage. C) Stack temperature, ambient temperature, and CO2 flue gas percentage. D) Ambient temperature, return air temperature, supply air temperature, and stack temperature.
The freezing point of substances:
A) Is the change of state of a substance from a liquid to a solid at a given pressure and temperature when heat is removed. B) Is 32°C. C) Is 0°F. D) Never considers pressures or temperatures.
The tool shown in the illustration is used to:
A. extend the rear caliper piston. B. retract the front caliper piston. C. retract the rear caliper piston. D. extend the front caliper piston.