Why might closing the oxygen cylinder, then the acetylene cylinder, then bleeding first the oxygen line, then finally the acetylene line at the end of a brazing project create a hazardous situation?
A) The acetylene and oxygen lines should be bled simultaneously.
B) The acetylene and oxygen cylinders should be closed simultaneously.
C) The acetylene cylinder should be closed first.
D) The last gas to go through the torch will be a flammable gas.
Question 2
When the heat load on the evaporator increases, the automatic expansion valve:
A) Closes to keep the pressure from increasing.
B) Does nothing because AEVs are not modulating devices.
C) Sends a signal to the electronic control board indicating the change.
D) Opens to feed more refrigerant.
A schematic of the circulatory system illustrating the pulmonary circulation picking up oxygen from
The Atmosphere’s Oxygen Came from PhotosyntheticOrganisms
An intake manifold gasket that failed and allowed coolant to be drawn into the cylinder(s).
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Many fuel-control oxygen sensors are located in the exhaust manifold near its outlet so that the ...
The heart and its major blood vessels. Oxygen-rich blood is pumped from the lungs to the left