When AC voltage is rectified and converted into DC, the resulting waveform is normally not pure, flat DC. The pulses that occur are called _____.
A. harmonics
B. cosines
C. ripples
D. peaks
Answer: C
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Tests by the BIA indicate that _____ portland cement–lime mortars, under ASTM C270 or BIA Designation M1-72, provide maximum bond between masonry units and mortar.Â
A. Type N or Type O B. Type S and Type N C. Type M or Type S D. Type O and Type S
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250.4 - 112.8 = ?
A. ?62.4 B. ?127.6 C. ?137.6 D. ?148.4
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What are the chemical components of HFC refrigerant?
What will be an ideal response?
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The time interval between two successive peaks of a sustained sine wave on a Ziegler-Nichols graph is the ____.
A. ultimate gain B. ultimate proportional band C. ultimate period D. all of the above
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