The two most common causes of porosity are improper welding techniques and _____.?
?
A. heat?
B. shielding gas?
C. nitrogen?
D. contamination?
Answer: D
You might also like to view...
An automotive engine that running at too high of a temperature can have which of these problems?
A) Excessive oil consumption B) High thermal inefficiency C) High oxides of carbon D) Poor cooling system circulation
Dampers (damper springs) are used inside some valve springs to ________
A) Decrease valve spring pressure B) Retain valve stem seals C) Prevent valve spring surge D) Keep the valve spring attached to the valve
With the Volts/Div. switch set to 2 mV, a sine wave measures 6.3 blocks with a 1x probe. The rms value of this sine wave is ____.
A. 4.45 mV B. 6.3 mV C. 44.5 mV D. 12.6 mV
Copper pipes have soldered joints and fittings, and are used only for carrying hot water.
Answer the following statement true (T) or false (F)