Avto.chilangar

6. (Murakkab) Amortizator ishlamay qolsa, qaysi fizik jarayon kuchayadi? A) Ishqalanish kamayadi B) Tebranish amplitudasi ortadi C) Bosim pasayadi D) Harorat kamayadi Javob: B 7. (Vaziyatli) Mashina burilishda sirpanadi (understeer). Sabab: A) Old g‘ildiraklar bosimi past B) Orqa g‘ildiraklar bosimi past C) Rul yaxshi D) Tormoz yaxshi Javob: A 8. (Hisob-kitob) Avtomobil 72 km/soat (20 m/s). G‘ildirak radiusi 0.5 m. Burchak tezlikni toping. A) 20 rad/s B) 40 rad/s C) 10 rad/s D) 5 rad/s Javob: B 9. (Diagnostika) Podshipnik nosozligi qanday aniqlanadi? A) Faqat ko‘rish bilan B) Harakatda shovqin ortadi C) Dvigatel o‘chadi D) Yonilg‘i kamayadi Javob: B 10. (Murakkab) Rul mexanizmida люфт ortsa, bu nimaga olib keladi? A) Barqarorlik oshadi B) Boshqaruv aniqligi pasayadi C) Tezlik ortadi D) Yonilg‘i kamayadi Javob: B 11. (Hisob-kitob) Radius 0.25 m bo‘lgan g‘ildirak 1 sekundda 10 m yo‘l bosdi. Aylanish soni: A) 5 B) 6.4 C) 10 D) 12 Javob: B 12. (Tahliliy) Tashqi shina qismi yeyilsa: A) Camber manfiy B) Camber musbat C) Toe-in D) Caster Javob: B 13. (Vaziyatli) Mashina notekis yo‘lda “urib ketadi”. Sabab: A) Qattiq ressora B) Yangi shina C) Kuchli dvigatel D) Toza filtr Javob: A 14. (Murakkab) Stabilizator ishlamasa: A) Yonilg‘i kamayadi B) Burilishda og‘ish ortadi C) Tezlik oshadi D) Sovutish yaxshilanadi Javob: B 15. (Hisob-kitob) Agar aylanish chastotasi 600 ayl/min bo‘lsa, bu sekundiga nechta aylanish? A) 5 B) 10 C) 20 D) 60 Javob: B 16. (Diagnostika) Tormoz diskida “tepish” hissi bo‘lsa: A) Disk egilgan B) Moy ko‘p C) Shina yangi D) Rul yaxshi Javob: A 17. (Murakkab) Rul gidravlik tizimida bosim kamayishi: A) Rul yengillashadi B) Rul og‘irlashadi C) Tezlik oshadi D) Yonilg‘i kamayadi Javob: B 18. (Hisob-kitob) G‘ildirak uzunligi (aylanasi) 2 m. 1 km yo‘lda nechta aylanish qiladi? A) 250 B) 500 C) 750 D) 1000 Javob: B 19. (Tahliliy) Shina markaziy qismi yeyilsa: A) Bosim past B) Bosim yuqori C) Camber noto‘g‘ri D) Rul buzilgan Javob: B 20. (Vaziyatli) Mashina tezlikda “suzadi”: A) Amortizator nosoz B) Faralar o‘chgan C) Generator kuchli D) Radiator toza Javob: A 21. (Murakkab) Osma tizimining rezonans hodisasi qachon yuz beradi? A) Tebranish chastotasi tabiiy chastotaga teng bo‘lsa B) Tezlik nol bo‘lsa C) Moy ko‘p bo‘lsa D) Rul qattiq bo‘lsa Javob: A 22. (Hisob-kitob) 20 m/s tezlikda, radius 0.4 m → burchak tezlik: A) 25 rad/s B) 50 rad/s C) 10 rad/s D) 5 rad/s Javob: B 23. (Diagnostika) Mashina tormozda titrasa, lekin rul tinch bo‘lsa: A) Orqa disk muammo B) Old disk muammo C) Rul buzilgan D) Amortizator yangi Javob: A 24. (Murakkab) Ressoraning elastikligi kamayishi: A) Qattiqlik oshadi B) Komfort kamayadi C) Tezlik oshadi D) Yonilg‘i kamayadi Javob: B 25. (Hisob-kitob) Agar avtomobil 36 km/soat (10 m/s) tezlikda yurib, g‘ildirak radiusi 0.5 m bo‘lsa: ω = ? A) 10 rad/s B) 20 rad/s C) 5 rad/s D) 40 rad/s Javob: B 26. (Tahliliy) Toe-in ortiqcha bo‘lsa: A) Tashqi yeyilish B) Ichki yeyilish C) Markaz yeyilish D) Yeyilmaydi Javob: B 27. (Vaziyatli) Rulni buraganda “taqillash” ovozi: A) Sharli birikma nosoz B) Dvigatel kuchli C) Moy yaxshi D) Radiator toza Javob: A 28. (Murakkab) Amortizatorning asosiy fizik vazifasi: A) Energiya yig‘ish B) Energiyani issiqlikka aylantirish C) Tezlik oshirish D) Bosim oshirish Javob: B 29. (Diagnostika) Bir g‘ildirak tez qiziydi: A) Tormoz qotib qolgan B) Moy yaxshi C) Shina yangi D) Rul soz Javob: A 30. (Eng murakkab – kompleks) Mashina: tezlikda vibratsiya bor burilishda og‘adi tormozda titraydi Eng to‘g‘ri kompleks xulosa: A) Faqat dvigatel muammo B) Balans + stabilizator + disk muammosi C) Akkumulyator nosoz D) Radiator iflos Javob: B 1. (Kompleks diagnostika) Avtomobil 80 km/soatda rulda vibratsiya, 40 km/soatda esa yo‘q. Qaysi ketma-ketlikda tekshirish to‘g‘ri? A) Amortizator → dvigatel → radiator B) Balansirovka → disk egilishi → podshipnik C) Moy → filtr → sham D) Akkumulyator → generator Javob: B