A __________ is used to determine the presence of unburned fuel in a sample of flue gases taken from an oil burner.

A. draft gauge
B. pressure gauge
C. smoke tester
D. vacuum gauge


Answer: C

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What will be an ideal response?

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Which of the following systems will most likely show the largest deviations from Raoult’s Law behavior?

A. Propane + 2-propanol B. n-hexane + n-heptane C. Benzene + toluene D. 1-butanol + 2-butanol E. 1,2-dimethyl cyclohexane + 1,3-dimethyl cyclohexane

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Use the accompanying figure. Angle A is 19o and angle B is 25o. Compute the angle of tilt and round to the nearest minute.

A. 30o06' B. 32o32' C. 33o33' D. 35o16'

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A ____ sensor houses the transmitter and receiver in a single unit.

A. diffuse B. thru-beam C. retro-reflective D. specular

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