The infrared humidifier consists of a horizontal water reservoir and infrared lamps with _____.

a. plates
b. a sponge
c. reflectors
d. heaters


c. reflectors

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Water is contained in a cylinder at 120ºC and 200 kPa. It is:

A) A liquid B) A mixture of vapor and liquid C) A subcooled gas D) Superheated vapor

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Gain is best described as the _____.

a. stretching of conduit as it is bent b. distance saved by the arc of a 90° bend c. distance between bends d. hypotenuse of a 90° bend

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Technician A says that fuel cell vehicles may use an electric storage device. Technician B says that fuel cell vehicles that use a storage device to help power the vehicle are called fuel cell hybrid vehicles. Which technician is correct?

A) Technician A only B) Technician B only C) Both Technicians A and B D) Neither technician A nor B

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There is a gear ratio of 3:1 between a pair of gears. One gear has 18 teeth. How many teeth can the other gear have?

A. 6 teeth B. 9 teeth C. 36 teeth D. 54 teeth E. both a and d

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