Toplinska obrada čelika
Quiz
•
Instructional Technology
•
9th Grade
•
Practice Problem
•
Hard
Jasna Zagar
Used 18+ times
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10 questions
Show all answers
1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Toplinska obrada je postupak djelovanja temperature na materijal u svrhu mijenjanja njegove mikrostrukture i time mijenjanja njegovih svojstava.
Točno
Netočno
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Koji materijali se najčešće toplinski obrađuju?
Čelici
Obojeni metali
Plemeniti metali
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Koje svojstvo čelika se postiže kaljenjem?
Rezljivost
Oblikovljivost
Tvrdoća
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Popuštanje je toplinska obrada kojom se:
Povećavaju krutost i tvrdoća materijala
Poboljšava svojstvo tečenja
Materijal omekšava da bi se lakše oblikovao deformiranjem
5.
MULTIPLE CHOICE QUESTION
45 sec • 1 pt
Zašto se pri toplinskoj obradi kaljenjem moraju zaštititi oči naočalama ili maskom za lice?
Voda u kojoj se vruć materijal hladi može prskati pa vrele kapljice mogu upasti u oči i trajno oštetiti vid
Zbog iskrenja zagrijanog materijala
Zbog električnog luka koji može nastati zbog kratkog spoja na oštećenom kabelu električne peći za zagrijavanje materijala
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Kako se naziva svojstvo materijala da podnese plastičnu deformaciju bez loma?
Elastičnost
Duktilnost
Taljivost
7.
MULTIPLE SELECT QUESTION
45 sec • 1 pt
Koji su najčešći razlozi za toplinsku obradu čelika?
Poboljšanje mehaničkih svojstava
Smanjenje žilavosti
Povećanje duktilnosti
Povećanje unutrašnjih naprezanja
Priprema za obradu rezanjem
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