16.Ukubala njani okwangoku okuvelisa isigaba esithathu?
Impendulo: I = P / (√3 Ucos φ) Oko kukuthi, ngoku = amandla (watts) / (√3 * 400 (volt) * 0.8).
Ifomula eyenziwe lula yile: I (A) = iyunithi yamandla alinganisiweyo (KW) * 1.8
17. Luphi ubudlelwane phakathi kwamandla abonakalayo, amandla asebenzayo, amandla alinganisiweyo, amandla aphezulu, kunye namandla ezoqoqosho?
Impendulo: 1) Iyunithi yamandla abonakalayo yiKVA, esetyenziselwa ukubonisa amandla esiguquli kunye neUPS kwilizwe lethu.
2) Amandla asebenzayo ngamaxesha angama-0.8 amandla abonakalayo, kwi-KW, esetyenziswa kwizixhobo zokuvelisa amandla nakwizixhobo zombane kwilizwe lam.
3) Amandla alinganisiweyo eseti yedizili yedizili ibhekisa kumandla anokusebenza ngokuqhubekekayo iiyure ezili-12.
4) Amandla aphakamileyo ngamaxesha ali-1.1 amandla alinganisiweyo, kodwa yiyure e-1 kuphela evunyelwe ngaphakathi kweeyure ezili-12.
5) Amandla ezoqoqosho ngamaxesha angama-0.75 amandla alinganisiweyo, elingamandla okuphuma okusetwa ngumvelisi wedizili anokuqhuba ixesha elide ngaphandle kwexesha elimiselweyo. Xa uqhuba kula mandla, ipetroli incinci kwaye inqanaba lokungaphumeleli lelona liphantsi.
18. Kutheni kungavumelekanga ukuba iiseti zejenereyitha zedizili zisebenze ixesha elide xa amandla engaphantsi kwe-50% yamandla alinganisiweyo.
Impendulo: Ukwanda kokusetyenziswa kweoyile kwenza ukuba iinjini zedizili zithambekele ekwakheni ikhabhon, eyonyusa izinga lokungaphumeleli kwaye icuthe ixesha lokulungisa.
19. Awona mandla aphumezileyo wenkunkuma ngexesha lokusebenza isekwe kwi-wattmeter okanye kwi-ammeter?
Impendulo: I-ammeter iya koyisa, kwaye imitha yombane yeyokujonga kuphela.
20. Ubuninzi kunye nevolthi yeseti yomvelisi zombini azizinzanga. Ngaba ingxaki nge-injini okanye i-generator?
Impendulo: Ilele kwi-injini.