In a parallel RLC circuit,at resonance the capacitive reactance (XC) and the inductive reactance (XL):
A) add to each to cancel current flow. B) equal and oppose current flow.
C) are moderate. D) are minimum.
B
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An uninsulated gas turbine receives air at 1000 kPa, 800oC, at a mass flow rate of 12.0 kg/s. The air exits at 100 kPa, 420oC. The turbine produces 4.10 MW of power.
(a) Determine the heat transfer rate for the turbine. (b) Using your turbine model, plot the required heat transfer rate for exit temperatures varying between 400°C and 500°C, with the other conditions remaining the same. (c) Using your turbine model and the original conditions, plot the variation in power produced as the heat transfer rate varies between 0.0 MW and -3.0 MW. Given: P1 = 1000 kPa; T1 = 800°C; P2 = 100 kPa; T2 = 420°C; m?= 12.0 kg/s; W?=4.10 MW=4,100 kW; Air (Take State 1 as the inlet, State 2 as the outlet.) Assume: For a turbine, assume steady-state, steady-flow, single-inlet, single-outlet flow, with ?KE = ?PE = 0
Most transmission service is preventive maintenance, rather than correction of a problem.
Answer the following statement true (T) or false (F)
Which of the following statements is LEAST-Likely true?
A. An integrated circuit (IC) is a complete miniaturized electric circuit. B. An integrated circuit consumes considerably more electrical current than a large-scale circuit. C. As many as 30,000 transistors can be placed on a chip that is only 1/4" square. D. ICs are limited in the amount of electrical current they can carry.
Professional technicians have knowledge of hazards in the work area.
Answer the following statement true (T) or false (F)