Conceptual Actual Frequently Tested Exam
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1. Lubricators reduce internal friction in tools or equipment by:
A. Filtering air before compression
B. Cooling the compressed air
C. Releasing a controlled mist of oil into the compressed air
D. Reducing system pressure
2. Regulators, also called pressure-reducing valves, are used to:
A. Maintain air temperature
B. Adjust and control system air pressure
C. Increase air velocity
D. Lubricate system components
3. If a burner were functioning properly and set "rich," which of the following
would not be present in an exhaust analysis?
A. CO₂
B. H₂O
C. O₂
D. N₂ (Nitrogen)
4. An air lubricator should be installed in a pneumatic system:
A. Before the compressor
B. Before the regulator
, C. After the regulator
D. Before the filter
5. A pilot flame detector can be:
A. A pressure switch
B. A flame rod
C. A thermocouple
D. A flow meter
6. The quantity of heat necessary to raise one pound of water by one degree
Fahrenheit is:
A. 10 BTU
B. 100 BTU
C. 1 BTU
D. 0.1 BTU
7. Shutting the fluid discharge of an air-operated reciprocating pump will
cause the pump to:
A. Overheat
B. Stall
C. Run faster
D. Leak
8. In a properly lubricated bearing where no metal-to-metal contact occurs
while rotating, the bearing is a:
A. Ball bearing
B. Roller bearing
C. Journal bearing
D. Thrust bearing