How does air from air-conditioning vents affect open display cases?
A) Open display cases are not affected by external air sources because of their powerful built-in air curtains.
B) It improves their performance by lowering the temperature of the air surrounding the display case.
C) Open display cases are not affected by external air sources because of their engineered air baffles.
D) It disrupts the case's air curtain, causing them to rise in temperature.
D
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The power supply from the panelboard is fed into a busway run through a ____.
A. drop-in assembly B. standard hanger C. feed-in adapter D. trolley run
Which of the following is NOT true of magnetic fields?
A. unlike poles attract B. flux lines exit from the north pole C. flux lines enter the south pole D. flux density is lowest at the poles
The curved oval metal tube inside a gauge is called:
A) A Bourdon tube. B) A pressure transducer. C) A strain gauge. D) A pressure tube.
Which of the following is correct regarding a series circuit?
a. Highest resistance has most current b. Lowest resistance has most current c. Lowest resistance has highest voltage drop d. Highest resistance has highest voltage drop