642 - 31.443 =
A) 610.557 B) 611.657 C) 611.667 D) 610.657
A
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A BMS user interface that links two or more building client computers to a server computer is called a _____.
a. LonTalk b. BACnet c. LAN d. WAN
Discuss the characteristics of low value materials.
What will be an ideal response?
Batteries (e.g., lead-acid batteries) store chemical energy and convert it to electric energy on demand. Batteries do not store electric charge or charge carriers. Charge carriers (electrons) enter one terminal of the battery, acquire electrical potential energy, and exit from the other terminal at a lower voltage. Remember the electron has a negative charge! It is convenient to think of positive carriers flowing in the opposite direction, that is, conventional current, and exiting at a higher voltage. (Benjamin Franklin caused this mess!) For a battery rated at 12 V and 350 A-h, determine: a. The rated chemical energy stored in the battery. b. The total charge that can be supplied at the rated voltage.
What will be an ideal response?
On a General Motors vehicle, how long will the fuel pump run if the ignition is turned on but the engine is not started?
A) Until the ignition is turned off B) About two seconds C) Between 10 and 20 minutes, depending on the vehicle D) 500 ms