What is a redundant gas valve?
A) a gas valve that has no real purpose
B) a gas valve that was once necessary on older furnaces but is no longer used
C) a gas valve that is used in case the main valve quits working
D) a gas valve with two valves mechanically in series
Question 2
What could cause the tungsten electrode to turn gray or blue?
A) The operator had only 1/4 to 1 inch stick out, and that is not enough to prevent electrode burning.
B) Not enough electrodes stick out.
C) Answers A and B are both correct.
D) Not enough post flow
E) Too much post flow
Are reality shows “real”? Does the media tell the “truth”?
Start the valve adjustment procedure by first disconnecting and labeling, if necessary, all ...
With all vacuum lines and the intake tube removed, the valve cover can be removed after removing all ...
If the thermostat has a jiggle valve, it should be placed toward the top to allow air to escape. If ...
A valve corroded by nitric acid. Hazardous materials releases are often caused by using incompatible ...
The TaqMan approach to quantitative real-time PCR (qPCR)