Technician A says that a front wheel drive hybrid electric vehicle can only generate electricity during braking from the front wheel motor(s). Technician B says that antilock braking (ABS) is not possible with a vehicle equipped with a regenerative braking system. Who is correct?

A) Technician A only B) Technician B only C) Both technicians D) Neither technician


A

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An insulated steam turbine is to produce 100 MW of power. Superheated steam enters the turbine at 12 MPa and 600°C, and saturated water exits the turbine at a pressure of 80 kPa. There are two design constraints to be considered:

(1) The turbine blade design requires that the quality of the steam to be no less than 0.90 to maintain blade durability. (2) The maximum mass flow rate of steam that the system can utilize is 100 kg/s. Plot the mass flow rate of steam necessary to produce 100 MW of power for exit qualities ranging from 0.9 to 1.0, and then determine the range of exit qualities that satisfy both design constraints. Determine the necessary mass flow rate of the steam. Given: P1 = 12.0 MPa; T1 = 600°C; W?=100 MW=100,000 kW; P2 = 80 kPa; Steam State 1 is the inlet, state 2 is the outlet. Assume: Q? = 0 (insulated) Also, for a turbine, assume steady-state, steady-flow, single-inlet, single-outlet flow, with ?KE = ?PE = 0

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Closed-loop, or ____________________, systems reuse the same heat transfer fluid, which is circulated in buried plastic pipes within the earth or within a lake or pond.

Fill in the blank(s) with the appropriate word(s).

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Technician A says that multipurpose undercoats have been developed to perform like a sealer, a primer filler, or a corrosion protector. Technician B says that multipurpose undercoats are primer fillers only. Who is correct?

A. Technician A only B. Technician B only C. Both Technicians A and B D. Neither Technician A nor B

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A unity-gain feedback system with overall transfer function H(s) has a forward-path transfer function H1(s). For each of the following forward-path transfer functions, assuming the overall system is stable, determine whether the responses to a unit-step and unit-ramp excitation of the overall unity-gain feedback system have zero, finite or infinite steady-state error.

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