Technician A says that PAFC fuel cells can use hydrogen as fuel. Technician B says that PEM fuel cells can use hydrogen as fuel. Which technician is correct?
A) Technician A only B) Technician B only C) Both technicians D) Neither technician
C
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When used in control cable, which of the following must be grounded in order to be effective?
a. Drain wires b. Crimp connectors c. Conductors d. Screw terminals
Most occupants will normally operate their system at about ____ °F.
A. 68 B. 72 C. 75 D. 80
A video recording system was purchased 3 years ago at a cost of $40,000. A 5-year recovery period and DDB depreciation have been used to write off the basis. The system is to be replaced this year with a trade-in value of $4000. What is the difference between the book value and the trade-in value?
What will be an ideal response?
Underwriters Laboratories standard 181 B covers:
A) Methods of connecting and sealing ductboard. B) Methods of connecting and sealing metal duct. C) Methods of connecting and sealing flexible duct. D) Methods of connecting and sealing all types of duct.