147
C) himoyalovchi gazlar muhitida, suv bug„i muhitida payvandlash D) flyus qatlami ostida, himoyalovchi gazlar muhitida. 6. Yarim avtomatik va avtomatik payvandlashga nimalar kiradi? A) vibro-yoy bilan payvandlash, kontaktlab payvandlash, ishqalab payvandlash va plazma-yoy yordamida payvandlash B) kontaktlab payvandlash, ishqalab payvandlash va plazma-yoy yordamida payvandlash C) vibro-yoy bilan payvandlash, ishqalab payvandlash va plazma- yoy yordamida payvandlash D)vibro-yoy bilan payvandlash, kontaktlab payvandlash, ishqalab payvandlash 7. Qanday usulida 2 mm gacha qalinlikdagi, kam uglerodli va kam legirlangan po‘latdan, shuningdek, cho‘yan va rangli metal- lardan tayyorlangan detallarni payvandlashda foydalaniladi? A) Gazli payvandlash B) Elektr yoyi vositasida payvandlash C) Argon-yoy vositasida dastaki payvandlash D) kontaktlab payvandlash 8. Qanday payvandlash vositasida po‘lat va cho‘yandan murakkab shakilli qilib yasalgan detallar va ular sirtiga boshqa metall yoki qattiq qotishma suyuqlantirib qoplanadi? A) Elektr yoyi vositasida payvandlash B) Gazli payvandlash C) Argon-yoy vositasida dastaki payvandlash D) Kontaktlab payvandlash 9. Qanday payvandlash vositasida usulidan rangli metallardan yasalgan detallarni payvandlashda foydalaniladi? A) Argon-yoy vositasida dastaki payvandlash B) Elektr yoyi vositasida payvandlash C) Gazli payvandlash D) Kontaktlab payvandlash
