Polyester and other synthetic fabrics should not be worn when cutting because _____
a. they break down when exposed to ultraviolet light
b. sparks will cause them to melt, inflicting burns to the skin
c. they will burst into flames in the presence of pure oxygen
d. they will give off toxic fumes if exposed to acetylene
b
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Floating head heat exchangers are designed for high temperature differentials ¬¬¬¬¬_______________ .
a. slightly above 545ºF b. slightly below 100ºF c. above 200ºF d. above 600ºF
How many egg cells are formed in meiosis during egg production?
a. one c. four b. two d. six
Which of the following is a correct statement regarding the selection and/or connection of shielding-gas
cylinders to the welding equipment? a. The shielding gas selection is not important; all of the available gases do an equal job in all welding applications. b. Remove the cylinder?s protective cap, momentarily crack the cylinder valve open to blow out any dirt, and then close it. c. Install the regulator/flowmeter assembly first, then crack the cylinder valve open to blow out any dirt and debris. d. When using argon as a shielding gas, special precautions and respirators are required due to its toxicity.
Technician A says the centering gauges can be used to determine the datum plane. Technician B says the height measurements are taken from the datum plane. Who is correct?
A. Technician A only B. Technician B only C. Both Technicians A and B D. Neither Technician A nor B