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.
Cyanosis as shown here at the patient’s fingertips results from a lack of oxygen in the tissues
The downward movement of the piston draws the air–fuel mixture into the cylinder through the ...
The more air and fuel that can be packed in a cylinder, the greater the density of the air–fuel ...
A typical handheld cylinder leakage tester.
A conventional zirconia oxygen sensor can only reset to exhaust mixtures that are richer or leaner ...
Expanded view of Silicon-oxygen tetrahedron