Toshkent davlat agrar unversiteti termiz filiali

155) Gidravlik osish tizimi nechta nuktali buladi?
A) 4 ta nuktali;
B) 1 ta nuktali;
C) 5 ta nuktali;
D) 2-3 nuktali;
156) Dvigatel massasini silindrlar ishchi hajmiga bulgan nisbatiga nima deyiladi?
A) hajm massasi;
B) solishtirma massasi;
C) litr masssi;
D) solishtirma kursatkich;
157) Aralash issiklik berish siklida ishlaydigan dvigatellarga kaysi dvigatellar kiradi?
A) porshenli dvigatellar;
B) benzinda ishlaydigan dvigatellar;
C) dizelda yonilgisida ishlaydigan avtotraktor dizel dvigatellari;
D) kompressorli dvigatellar;
158) Dvigatelni davomli ishlashini ta’minlovchi jarayonlar ketma-ketligining birligiga nima deyiladi?
A) takt;
B) ichki yonuv dvigatelining xakikiy (ishchi) sikli;
C) nazariy sikl;
D) tuganmas jarayon;
159) Tuldirish koeffitsenti deganda nimani tushunasiz?
A) silndrni gaz bilan tulishini ;
B) silindr hajmini tulganlik darajasini ;
C) kiritilgan yangi zaryad mikdorini silindr ishchi hajmiga sigishi mumkin bugan zaryadga nisbatini;
D) kiritilgan yangi zaryad mikdorini;
160) Sikish jarayoni oxirdagi bosim karbyuratorli va dizel dvigatellarda kancha buladi?
A) korbyuratorli dvigatellarda 0,2-0,4 MPa, dizellarda 1,2-2,0 MPa;
B) karbyurator dvigatellarda 0,3-0,5 MPa, dizellarda 1,8-2,5 MPa ;
C) karbyuratorli dvigatellarda 1,2-1,5 MPa, dizellarda 2,0-2,8 MPa;
D) karbyuratorli dvigatellarda 0,5-1,2 MPa, dizellarda 3,0-4,0 MPa;
161) Oksidlangan aralashmaning uz-uzidan alangelanishi natijasida bosim va haroratning anik kutarilishi hamda uruluvchi tulkin xosil kilish bilan utuvchi normal bulmagan yonish jarayoniga nima deyiladi?
A) notekis yonish jarayoni;
B) portlash jarayoni;
C) detanitsion yonish jarayoni;
D) kutilmagan yonish jarayoni;
162) Avtotraktor dvigatellarida sikish darajasi kaysi chegarada buladi?
A) benzinli dvigatellarda 5-9, dizel dvigatellada 13-20;
B) benzinli dvigatellarda 4 -5; dizellarda 8-1,2
C) benzinli dvigatellarda 13- 20; dizellarda 5-9;
D) benzinli dvigatellarda 2-3, dizellarda 20 -25;