Classify the structures in Figures P3.33. Indicate if stable or unstable. If unstable, indicate the reason. If the structure is stable, indicate if determinate or indeterminate. If indeterminate, specify the degree.
(a) Indeterminate 1°
(b) Indeterminate 3°
(c) Unstable (R < 3 + C)
(d) Unstable
(e) Indeterminate 3°
(f) Indeterminate 4°
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In heavy-duty wall-form systems, the forms components are connected with _____.
a. screw clamps b. nuts and bolts c. form ties and walers d. quick-connect hardware
Technician A says the accumulator is located on the high side of the refrigeration system. Technician B says the receiver/drier is located on the low side of the refrigeration system. Who is correct?
A. A only B. B only C. Both A and B D. Neither A nor B
Communication controllers in microcontrollers ________
A) require a separate external clock source to operate B) allow microcontrollers to communicate with other devices using specific communication protocols C) support only UART communication D) require little configuration to operate
____ conduct both directions of AC current flow.
A. Rectifiers B. TRIACs C. SCRs D. MOSFETs