C. 4,35Q d 2,175n
c. M9ch tu cua cac cu9n day trong cac thiet bi di$n tu, may khuech d9i tu.
tu, may khuech d9i tu.
d. Gau b va c dung
4.10 0iflc di§m cua v$t li$u sat tu mem la: □ □ □ □
a. C6 d9 dan tu thap, c6 tu d- l&n. b. 89 dan tu l&n, t6n hao be. c. Ca a va b deu dung. d. Ca a va b deu saj
4.11 £)§ truyen tai d-gc nang I- gng tu tr- cJng ta phai dung □ □ □ □
v$t li$u;
a. V$t li$u each di$n. b. V$t li$u dan di$n.
C. V;%1t li$u d~n tu'. d. Ca a,b va c deu saj
4.12 Trong h1nh (1 ) d- cJng cong Whoa so 2 lad- cJng cong □ D D D
tu hoa cua:
a. Sat dac biet tinh khiet.
b. Sat ky thu;%1t tinh khiet (99,92%Fe). c. Sat tinh khiet (99,98%Fe).
d. Hqp kim sat - Niken (26%).
12or I/ 1.2 I V ---AJ-A-+---t-1 soo / Yv V 08 I I ,J . 400 H--/--+1---+--+--+----,lr--/--+--, 0 .4 J i----- " - - - R 0 0.2 0.4 0.6 0.8 1.0 1.2 octtit Hinh 1
4.13 Trong h1nh (1 ) d- cJng cong tu hoa so 3 lad- cJng cong W □ D D D
hoa cua:
a. Sat dac biet tinh khiet.
b. Sat ky thu;%1t tinh khiet (99,92%Fe) c. Sat tinh khiet (99,98%Fe)
d. H<Jp kim sat - Niken (26%)
4.14 Hqp kim c6 d9 tuth§m cao gom cac lo9i: D D D D
a. Pecmaloi, AlusifE?
b. Pecmaloi, Alusife, Alunico c. Pecmaloi, Alusife, Alunisi d. Pecmaloi, Alusife, Alunj
4.15 Cac v;%1t li$u sat tu mem baa gom: D D D D
a. Pecmaloi, Alusife, sat ky thu;%1t, thep silfc. b. Alusife, sat ky thu;%1t, thep silfc
c. Pecmaloi, sat ky thu;%1t, thep silfc .
d. Sat ky thu$t, thep silfc.
4.16 Cac v$t li$u sat tlf cCrng bao gom: □ □ □ □ a. Thep h<;5p kim hoa, Cac nam cham d0ng b9t
b. Cac h<;5p kim tLf cCrng, Alunico, Alusife
c. Thep h<;5p kim hoa, Cac nam cham d0ng b9t, Cac h<;5p kim tLf cCrng.
d. Thep h<;5p kim hoa, cac nam cham d9ng b(>t, pecmaloi.
4.17 Trang h1nh (1) d- ang cong Whoa so 6 la d- ang cong tlf □ □ □ □
hoa cua:
a. Sat d$c bi$t tinh khiet.
b. Sat ky thu$t tinh khiet (99,92%Fe) c. Sat tinh khiet (99,98%Fe)
d. H<;5p kim sat - Niken (26%)
4.18 Trang ky hi$u thep ky thu$t di$n d- <;5c ky hi$u bang chCr □ □ □ □
va cac con so, con so thCr nhat ch1:
a. 8$c tr- ng cho tfnh chat di$n va tU' cua thep. b. Chi thep d-<;JC can ngu9i.
c. Thep d- <;5c can ngu9i va ft thc:J.
d. Chi ham I- <;5ng gan dung cua silfc theo %.
4.19 Thep ky thu$t di$n d- <;5c ky hi$u bang ch Cr va cac con so, □ □ □ □
con so thCr hai chi:
a. 8$c tr- ng cho tf nh chat di$n va tU' cua thep.
b. Chi thep d- <;5c can ngu(>i. c. Thep d- <;5c can ngu(>i va ft th&.
d. Chi ham I- <;5ng gan dung cua silfc theo %.
4.20 V$t li$u sat tLf c6 cac lo9i sau: □ □ □ □
a. V$t li$u sat tLf mem, v$t li$u sat tLf cCrng,
b. V$t li$u sat tLf mem, v$t li$u sat tLf cung va v$t lieu c6 cong dt;-1ng tlf d$c bi$t
c. V$t li$u sat tU' mem, v$t li$u c6 cong dt;-1ng tlf d$c
b1et
d. V$t li$u sat W cCtng, v$t li$u c6 cong dL;Jng tu' di[lc
biet, Vat lieu sat W mem . . .
4.21 Theo cong ngh$ che t9o thep la ky thu$t di$n c6 cac □ □ □ □
loai:
a. Sat ky thu$t, thep silfc b. Thep d~ng h- &ng.
c. Thep can n6ng va thep can ngu9i. d. Thep vo h- dng
4.22 M9t hgp kim c6 ham I- gng (40-50)% Nikel so phan tram □ □ □ □
con 19i la sat va cac t9p chat c6 ten g9i la: a. Pecmaloi
b. Alusife.
c. Pecmaloi lo9i nhieu niken. d. Pecmaloi loai ft niken.
4.23 Gae hqp kim c6 d9 tu tham phL;J thu9c nhieu vao nhi$t □ □ □ □ d9 d-qc g9i la:
a. V$t li$u sat tu mem.
b. Pecmaloi lo9i nhieu niken.
c. V$t li$u c6 cong dt:1ng W di[lc bi$t.
d. Sat ky thu$t tinh khiet (99,92%Fe).
4.24 De truyen tai d- qc nang I- gng W tr- c1rig ta phai dung □ □ □ □
v$t li$u;
9 V$t li$u each di$n. b. V$t li$u dan di$n. c. Vat lieu dan tu'. d. Ca a,b va c deu sa!
4.25 Trong ky hi$u cua thep ky thu$t di$n neu sau ky hi$u c6 □ □ □ □
chCf A chung to d6 la:
a. Sat ky thu$t tinh khiet (99,92%Fe).
b. Thep c6 suat t6n hao 16n
c. Thep c6 suat t6n hao nho
d. Tat ca deu sai.
TAI u~u THAM KHAo
1. VATLI~UE>$N
Tac gia: Nguyen Xuan Phu - NXB Khoa h9c va Ky thu$t - 1998.
2. KHI Cl) E>$N - KET CAU SU Dl)NG VA SUA CHUA
Tac gia: Nguyen Xuan Phu - NXB Khoa h9c va Ky thu$t - 1998.
3. MAYE>I~Nl,2
Tac gia: Tran Khanh Ha - NXB Khoa h9c va Ky thu$t - 1997
4. CONG NG~ CHE TAO VA TINHTOAN SUACHUAMAYE>I~N 1,2,3
Tac gia: Nguyen Tr9ng Thang - NXB Giao Dl}c - 1995
5. QUAN DAY, SUDl)NGVA SUACHUAE>QNGCOE>$NXOAYCHIEU VA MQT CHIEU THONG Dl)NG
Tac gia: Nguyen Xuan Phu (chu bien) - NXB Khoa h9c va Ky thu$t- 1997.