As the load on an engine increases, manifold vacuum decreases and the manifold absolute pressure ________
A) Increases
B) Changes with barometric pressure
C) Remains same value
D) Decreases
Answer: A) Increases
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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
Before starting a cable pull, make sure that _____.
a. both ends of the cable are permanently identified b. all communications equipment is in working order c. the cable is unreeled and cut to length d. the cable is correctly spliced
?Not all drawings just have the three standard views, so a welder needs to know how all of the six views relate to each other. Which of the following views would be related correctly to each other?
A. ?The right and left side views are on opposite ends of the view. B. ?The bottom view is drawn below the right side view. C. ?The back view is to the side of the right side view. D. ?Both side views can be drawn next to each other.
The three phases of the swine industry are ____________________, growing, and finishing.
Fill in the blank(s) with the appropriate word(s).