Gas-fired rooftop units are normally vented through:
A) Draft hoods connected directly to the unit.
B) A separate power venter.
C) Double-wall vent pipe connected to the side of the unit.
D) Double-wall vent pipe connected to the top of the unit.
A
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A four cycle engine takes two complete camshaft revolutions and one revolution of the crankshaft to complete one engine cycle, firing all cylinders once.
Answer the following statement true (T) or false (F)
Answer the following statements true (T) or false (F)
1) Boyle's law states that the product of a given pressure and volume is constant with constant temperature. 2) The term inspiration in the context of pressure means inhalation or breathing in. 3) Atmospheric pressure is typically measured using a barometer 4) Decompression sickness occurs only when making a rapid rise from underwater. 5) High-temperature water is water that has been heated sufficiently to create steam
To directly measure the diameter of a valve guide in a cylinder head, use a micrometer and a _______
A) Feeler gauge B) Dial indicator C) Small hole gauge D) Telescopic gauge
The molecules of gases have:
A) The same levels of energy as solids and liquids when contained. B) Higher energy levels than solids or liquids. C) Lower levels of energy than solids or liquids due to molecular instability. D) Higher levels of energy than solids or liquids only when exposed to temperature changes.