What is the best way to tell if a disposable refrigerant cylinder is equipped with a dip tube
a. Crack the valve to see what comes out
b. Determine if it is an HFC or an HCFC
c. Determine if it is azeotropic or near-azeotropic
d. Check the cylinder labeling
d. Check the cylinder labeling
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Use the accompanying figure to compute angle C to the nearest minute. Angle A = 29o and angle B = 30o.
A. 21o48' B. 23o50' C. 25o52' D. 27o55'
Which of the following is true of tungsten contamination?
A. Tungsten contamination causes a weak weld and must be cleaned. B. Tungsten particles will not show up, even if the weld is x-rayed. C. Tungsten contamination is rare and easily controlled. D. Tungsten particles in the weld will have no effect on the weld.
Plant pigments are least effective in absorbing which color of light?
a. yellow c. red b. green d. blue
Pathogenic bacteria are commonly known as:
What will be an ideal response?