
BLUE BOOK (401-496)
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Science
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University
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engr roiskie top notcher
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96 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
The water velocity of a 5 m x 1 m channel is 6 m/s. What is the annual energy produced if the net head is 120 m and the over-all efficiency is 80%?
494,247,258 kW-hrs
247,497,582 kW-hrs
247,494,528 kW-hrs
472,497,582 kW-hrs
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
A car engine with a power output of 65 hp has a thermal efficiency of 24%. Determine the fuel consumption rate of this car if the fuel has a heating value of 19,000 Btu/lbm.
36.28 lbm/hr
37.28 lbm/hr
37.28 lbm/hr
35.30 lbm/hr
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
The thermal efficiency of a Carnot cycle operating between 170°C and 620°C is closest to:
44%
50%
63%
73%
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
A hydro-electric impulse turbine is directly coupled to a 24 pole, 60 Hz alternator. It has a specific speed of 60 rpm and develops 3000 Hp. What is the required diameter assuming a peripheral speed ratio of 0.45?
0.661 m
0.552 m
0.443 m
0.773 m
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
In a hydroelectric power plant the tailwater elevation is at 500 m. What is the head water elevation if the net head is 30 m and the head loss is 5% of the gross head?
785.25 m
582.57 m
528.57 m
758.25 m
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
The tailwater and headwater of a hydro-electric plant are 150 m and 200 m respectively. What is the water power if the flow is 15 m3 /s and a head loss of 10% of the gross head?
6,621.75 kW
7,621.65 kW
5,621.76 kW
4,621.56 kW
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
In a hydro-electric plant, water flows at 10 m/s in a penstock of 1 m3 cross-sectional area. If the net head of the plant is 30 m and the turbine efficiency is 85%, what is the turbine output?
2,501.55 kW
2,100.21 kW
3,626.34 kW
3,124.65 kW
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