How long can power be retained in the high voltage system once it has been disabled?
A) Less than 90 seconds B) 10 to 20 minutes
C) 9 hours D) None of these
B
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A planetary gear set contains two elements: a ring gear and a sun gear.
Answer the following statement true (T) or false (F)
Why would a preheat coil be used on the energy-recovery wheel?
A) to prevent moisture transfer to the supply air B) to prevent frost from forming on the wheel C) to warm the exhaust air D) to dry the intake air
Which of the following is not one of the three advantages, listed in the text, of repurposing existing cabinets during a remodeling project?
A) Reduces environmental impact B) Save contractor labor costs C) Saves homeowners money D) Reduces need for new materials
A catch basin is covered by a metal cover level with the ground surface called a ____.
A. drainage grate B. bound C. profile D. lateral