Welders know that when the cylinder is cracked or opened and closed quickly, they should:
A) Never point or aim the cylinder valve at anyone
B) Stand on the opposite side of the valve
C) Have the cylinder secured before cracking
D) Warn others of what they are going to do before cracking the cylinder
E) All of the above
E
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The basic measure of the amount of light produced by a light source is called the _____.
a. incandescence b. candlepower c. footcandle d. lumen
A major consideration(s) when deciding whether or not to employ free cooling to reduce building interior temperatures is _________________
A. temperature of the outside air B. moisture content of the outside air C. Both A and B D. None of the above
Shading greatly affects a PV array’s performance and as a general rule a PV array should be free of shade from ___________.
a. 6:00 am to 9:00 pm b. 10:00 am to 2:00 pm c. 9:00 am to 3:00 pm d. 5:00 am to 5:00 pm
For the truss in Figure P9.29, compute the reactions and bar forces produced by the applied loads. Given: AE = constant, A = 1000 mm 2 , and E = 200 GPa.
