H v tờn:.. KIM TRA HC K I
Lp 9. Mụn: Cụng ngh 9
Thi gian: 45 phỳt
im Li phờ ca giỏo viờn
BI
I- TR

C NGHIấ

M : Cho

n cõu u

ng nhõ

t: ( 3 iờ

m )
1/ Trong mch in.
A/ Cõ

u chỡ c mc vo dõy trung ho B/ Cụng tc c mc vo dõy trung ho
C/ Búng ốn c mc vo hai dõy pha. D/ Cụng tc, cu chỡ c mc vo dõy pha
2/ Khi kim tra m bo an ton cho mng in trong nh:
A/ Ch cn kim tra dõy dn in B/ Ch cn kim cỏc dựng in
C/ Ch cn kim tra cỏc thit b in D/ Cn phi kim tra tt c cỏc phn t ca mng in
3/ Qui trỡnh lp t bng in c tin hnh nh sau:
A/ Vch du, khoan l bng in, lp t thit b, ni dõy v kim tra
B/ Khoan l bng in, vch du, lp t thit b, ni dõy v kim tra
C/ Khoan l bng in, vch du, lp t thit b, ni dõy v kim tra
D/ Khoan l bng in, lp t thit b, vch du ni dõy v kim tra

4/ Mt mi ni tt phi t nhng yờu cu sau:
A/ m bo an ton v p.
B/ Dn in tt, m bo v mt an ton in, p, cú bn c hc cao.
C/ t yờu cu v mt m thut v dn in tt.
D/ Dõy dn phi cú hỡnh dỏng nh c v cú bn c hc tt.
5/ Cụng t in l thit b dựng o:
A/ Cụng sut ca cỏc dựng in . B/ in ỏp v dũng in ca cỏc dựng in.
C/ in nng tiờu th ca cỏc dựng in. C/ in ỏp trờn cỏc dựng in.
6/ Hóy ch ra vt liu no sau õy cỏch in:
A/ Puli s B/Vng C/ Bch kim D/ Thic
II. Thc hnh: ( 7 im)
Câu 7 : (2đ)
a) Hãy mô tả cấu tạo của dây dẫn điện và dây cáp điện của mạng điện gia đình ?
b) So sánh sự giống và khác nhau của dây dẫn điện và dây cáp điện ?
Cõu 8 (2,5đ): i tng lao ng ca ngh in dõn dng l gỡ ?
Cõu 9 (2,5đ): Cú my loi mi ni dõy dn in? Yờu cu ca mi ni nh th no?
BI LM
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đáp án và biểu điểm
I TR

C NGHIấ

M : (3đ) mụi cõu cho

n u

ng 0,5 iờ

m.
Cõu 1 2 3 4 5 6
a

p a

n
d d a b c a
II. Thc hnh: ( 7 im)

Cõu 7: (2đ)
a,Cấu tạo của dây dẫn điện và dây cáp điện.
- Cấu tạo của dây dẫn điện gồm :
+ Lõi dây bằng đồng ( nhôm ).
+ Phần cách điện.
+ Vỏ bảo vệ cơ học.

- Cấu tạo của dây cáp điện gồm :
+ Lõi bằng đồng ( nhôm ).
+ Vỏ cách điện làm bằng cao su tự nhiên, cao su tổng
hợp, Chất PVC
+ Vỏ bảo vệ đợc chế tạo phù hợp với các điều kiện môi trờng
b,Sự giống và khác nhau của cáp điện và dây dẫn điện:
+ Giống: Cấu tạo điện gồm có:
* Lõi bằng đồng( hoặc nhôm ).
* Phần cách điện.
* Vỏ bảo vệ.
+ Khác: Cáp điện bao gồm nhiều dây dẫn điện

(1 im )


( 1 im )



Cõu 8:(2,5đ)
i tng lao ng ca ngh in dõn dng l.
- Thit b bo v, úng ct ly in.
- Ngun in 1 chiu v xoay chiu in ỏp thp di 380V
- Thit b o lng.
- Vt liu v dng c lm vic ca ngh in.
- Cỏc loi dựng in.


( 0,5 im )


( 0,5 im )
( 0,5 im )
( 0,5 im )
( 0,5 im )
Cõu 9: (2,5đ)
- Cú 3 loi mi ni: ni thng( ni trc tip), ni r( ni phõn nhỏnh), ni
dựng ph kin
- Yờu cu: cú bn c hc cao, dn in tt, cú tớnh thm m, m
bo an ton in
( 1 im )

( 1,5 im )