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.
Cutaway diagram of a four cylinder gasoline engine
An intake manifold gasket that failed and allowed coolant to be drawn into the cylinder(s).
A single cell wide-band oxygen sensor has four wires with two for the heater and two for the sensor ...
A difference in oxygen content between the atmosphere and the exhaust gases enables an O2S to ...
Cylinder Power Balance Test
Partial pressures (in mm Hg) for oxygen (red boxes) and carbon dioxide (blue boxes) in the atmospher