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BLUE BOOK (401-496)

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BLUE BOOK (401-496)
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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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