- 1. Minimum how many years should a V90-3MW model run if F > 2080000 EU?
A) 13 years
B) 11 years;
C) 9 years;
- 2. What should be the dimensions of the field from Fig. 1 so that the layout of the V90-3MW model complies with the law?
A) 283m. x 283 m.
B) / 260m. x 260 m.;
C) 255m. x 255 m.;
- 3. What is the maximum speed Km/h at which the blade tips of the V90-3MW model move? { L = 40 m.} if the wind is light and the rotation speed is 15 rpm?
A) 262 kn/h
B) 240 km/h
C) 225 km/h
- 4. What is the wind speed in the mainsail if it is 32 km/h on the deck?
A) 40 km/h
B) 36 km/h
C) 48 km/h
- 5. How does the force F change if the wind speed is reduced by a factor of 2?
A) decreases 8 times.
B) decreases 2 times.
C) decreases 4 times.
- 6. If in the right triangle АВС(⦟АСВ = 900), АВ = 215 m. и ⦟ВАС = 300, ВС = ?
A) 107,5 m
B) 132,5 m.
C) 154 m.
- 7. In how many years will the investment in the sail from zad.7 pay off if the price of diesel is 20% lower?
A) ≈ 6 years
B) ≈ 5 years
C) ≈ 4 years
- 8. One leg of a right triangle is twice as long as the other, and the hypotenuse is 10 cm. What are the lengths of the legs?
A) 2.√5cm. and 4. √5 cm.
B) 2.√3cm. and 4. √5 cm
C) 2.√2cm. and 4. √3 cm
- 9. Which three numbers are the sides of a right triangle?
A) 3, 6, 5
B) 7, 6, 9
C) 41, 9, 40
- 10. Is it true that if a triangle with sides a, b, c is right-angled, then the triangle with sides k.a, k.b, k.c (k > 0) is also right-angled?
A) no
B) yes
C) cannot be determined
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