Please provide some explenation with answer 4. The three primary concepts encomp

Question

Please provide some explenation with answer 4. The three primary concepts encompassed by combinational logic are OR. NOT, and C. XOR. A. AND B. NAND. D, EOR2. 5. During take-off the tail rotor is required to develop A. low positive pitch. C. low negative pitch. B. high positive pitch. D. high negative pitch. 6. The most common type of bearings, used in helicopters are bearings. c. ball A. spherical D. tapered B. roller 7. A disadvantage of elastomeric bearings when compared to conventional bearings is A. higher cost. C. more frequent seizing. D. frequent lubrication. shorter service life. 8. Which one of the following Boolean equations states that Qis true when one-and only one input is true? A. A A +B+ C C. Q A e B e C B. A.B.c 9. The cyclic control is used to C. trim the engine. A, raise and lower the aircraft. B. start the helicopter D. tilt the rotor. 10. What is used to reduce the power required by the tail rotorwhile in forward fight? A. Angling the main rotor C. Using a vertical tailfin B. Altering the rotor pitch axis D. Flying at a higher altitude 11. Normally, in NEMA logic schematics you would assume that input logic 1 A. closes NO contacts and opens NC contacts. B. opens NO contacts and closes NC contacts. C. closes both NO and NC D. opens both NO and NC contacts. 12. The BIS is used for A, wooden blades. B. honeycomb metal blades. C. a metal blade with a box construction and a wrap around skin. D. a composite blade.

Explanation / Answer

4. nand gate

5.high positive pitch

6.in helicopters we use roller bearings

7.frequent lubrication

8.option 1

9.the cyclic control is used to tilt the rotor

10. altering the rotor pitch axis

11.opens NO contacts and closes NC contacts

12.BIS is used fr a metal blade with a box constructiin and a wrap arund skin

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