Out of 40,000 Btu supplied, only 1,000 Btu are actually used in doing work. What is the thermal efficiency?
A. 2.5%
B. 4.5%
C. 6.5%
D. 7.5%
Answer: A
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An electric window with a two-wire motor operates only in one direction. Which of the following could cause this problem?
A. Faulty window switch B. Faulty window motor C. Faulty system circuit breaker D. All of the above
Name two types of on-off switches used in greenhouses
What will be an ideal response?
Technician A says that most fuel injection systems use the PCM to control the pulsing of the fuel injectors. Technician B says that most fuel injection systems use the PCM to control the operation of the fuel pump relay. Which technician is correct?
A) Technician A only B) Technician B only C) Both Technicians A and B D) Neither Technician A nor B
Current flow is the same through all components in ____ circuits.
A. series B. parallel C. series-parallel D. all