4.2. Kha nang dong cat cua Contactor la:
a. Dong di$n cho phep di qua tiep diem chf nh khi dong va khi cat
b. 0- gc tfnh bang so Ian dong cat khong tai (10-20) tri$u Ian c. So Ian Contactor dong cat trong m9t gia
d. So Ian dong cat tiep diem Contactor co tai 4.3. 0i$n ap djnh mCtc cua tiep diem chfnh Contactor la:
a. La di$n ap d�'it vao 2 dau cu9n day Contactor.
b. 0i$n ap cua m�ch di$n t- dng Ctng v&i tiep diem chfnh pha dong cat
c. La di$n ap d�H vao 2 dau cu9n day va cac tiep dierr Contactor.
d. Ca a va b sai
4.4. Tan so dong cat cua Contactor la:
a. 0- gc tf nh bang so Ian dong cat khong tai b. 0- gc tf nh bang so Ian dong cat co tai c. So Ian Contactor dong, cat trong m9t gia d. So Ian dong cat tiep diem Contactor co tai 4.5. Contactor phan lo�i theo nguyen ly truyen d9ng co:
a. Contactor kieu di$n tu', kieu hdi ep, kieu thuy lljc
b. Contactor kieu di$n m9t chieu, Contactor di$n xoay chieu
Khoa di�n - Truong TCN KTCN Hung Vuong
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c. Contactor di$n tu' d. Gau a va b dung
4.6. Khdi d9ng tu' d- gc phan lo9i theo:
a. 0i$n ap djnh mCJ'c cua cu9n day hut, so I- gng va lo9i tiep diem th-ang dong, th-ang md
b. Ket cau bao v$ chong tac d9ng bdi moi tr-ang xung quanh c. Kha nang lam bien doi chieu d9ng co di$n
d. Ca a, b va c deu dung 4.7. Khdi d9ng tu' kep bao gom:
a. M9t Contactor, m9t ro le nhi$t. b. Hai Contactor, hai ro le nhi$t. c. Hai Contactor, m9t ro le nhi$t. d. M9t Contactor, hai ro le nhi$t.
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4.8. Trong m9ch can lay tfn hi$u, cu9n day cua ro le trung gian d- gc □ □ □ □
mac:
a. Song song. b. Noi tiep. c. Hon hgp.
d. Ca a, b va c deu dung.
4.9. 0e lam vi$c d- gc lien tvc va tin c�y Contactor phai thoa man □ □ □ □
cac yeu cau sau:
a. Tiep diem co d9 ben chju mai men cao, kha nang dong cat cao va dcrt khoat.
b. Tieu thv cong suat ft nhat, bao v$ d- gc d9ng co di$n khoi bj qua tai lau dai.
c. Thoa man dieu ki$n khdi d9ng cua d9ng co di$n K0B co b9i so dong di$n (4 +7)1dm
d. Ca a, b va c deu dung.
4.1 O. Cong dl:Jng cua b9 khong che h1nh cam:
a. Chuyen doi m9ch di$n bang tay g9t, hay vo lang quay. b. 0ieu khien tn/c tiep hoiric gian tiep tu' xa cac chuyen doi
m9ch dien phCJ'c t9p.
c. 0ieu khien, khdi d9ng, dieu ch1nh toe, dao chieu, ham di$n may di$n va thiet b! di$n.
d. Ca , b va c deu dung.
Khoa dil$n - Truong TCN KTCN Hung Vuong
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4.1 1 . B9 khong che d9ng h/c d- gc dung de:
a. 0ieu khien gian tiep cac d9ng co di$n co cong suat Ion b. Chuyen d6i m<?ch di$n dieu khien,cac cu9n day Contactor,
khbi d9ng tu'
c. 0ieu khien tn/c tiep cac d9ng co di$n c6 cong suat nho va trung b1nh
d. Ca a, b va c deu dung
4.1 2. B9 khong che chi huy d- gc dung de:
a. 0ieu khien gian tiep cac d9ng co di$n co cong suat Ion b. Chuyen d6i m<?ch di$n dieu khien, cac cu9n day
Contactor, khbi d9ng tu'
c. 0ieu khien tn/c tiep cac d9ng co di$n co cong suat nho va trung b1nh
d. Gau a va b dung 4.1 3. Cong d1,mg cua Contactor la:
a, Tu' d9ng khong che va dieu khien tu' xa. b. 0ong cat tn/c tiep vao d9ng co
c. Ca a; b deu dung d. Ca a; b deu sai
4.14. Tiep diem cua role thdi gian nh- h1nh b�
4.1 5.
loai: I I �
a.Thu'ong dong - dong ch�m b. Th- dng dong - mb nhanh