Listed below are sample questions for 3E151O from our database. Register now to start taking tests for this AFSC! We have 394 questions currently in the database for this category.
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The version of this CDC we have in the database is 1
1 . A fan drive is an assembly made up of
a motor sheave, fan sheave, and connecting belts.
2 . 54. (222) A smoke detection system sensor is
a cadmium sulfide photocell.
3 . 97. (243) What do you use to remove soot, dirt, and scale from flues and fireboxes of boilers?
4 . 85. (445) If desired to maintain a constant temperature in the air leaving a coil, what type of coil control is used?
5 . 36. (217) What keeps a safety valve closed against the force developed by the steam pressure acting under the valve disc?
A compressed spring.
6 . 12. (007) In low pressure systems, gas is usually distributed at pressures from
3 to 8 ounces psi.
7 . 23. (212) The internal feedpipe is installed in the water space near, but not touching, the
bottom of the drum.
8 . 36. (612) Which steam trap reacts to a difference in the temperature between the steam and condensate?
9 . What is the most serious defect to look for when you inspect a heat exchanger?
10 . 57. (431) Which electronic controllers may combine temperature and humidity measurements to measure heat content?
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