1.
Išskiriamos trys siūlių kokybės klasės:
Correct Answer(s)
A. D
B. C
C. B
Explanation
The given answer suggests that there are three different quality classes for threads: D, C, and B. The quality classes are likely ranked in descending order, with D being the lowest quality and B being the highest. The answer does not provide any information about the specific criteria or characteristics that determine the quality class of the threads.
2.
Įrašyk teisingą skaičių iš paveiksliuko, prie teiginio:
1.Ištisinėmis siūlėms nurodomas siūlės ilgis, o neištisinėms - siūlių atkarpų skaičius ir atkarpų ilgis (šiame paveikslėlyje nurodoma, kad yra 10 suvirinimo atkarpų, kurių kiekvienos ilgis yra 150 mm, o atstumas tarp siūlių atkarpų yra 200mm)________
2.Papildomas siūlės tipo simbolis________
3.Siūlės tipo simbolis________
4.Siūlės skerspjūvio matmuo________
5.Simbolis nurodo, kad suvirinimą būtina atlikti montavimo vietoje________
6.Simbolis nurodantis, kad siūlė yra uždaras kontūras________
7.Siūlės kokybės klasė________
8.Simbolis nurodantis, kad siūlė abiejose privirintos plokštės pusėse yra neištisinė ir priešingose plokštės pusėse išdėstytos šachmatiškai________
9.Atstumas tarp siūlės atkarų (tik neištisinėms siūlėms)________
10.Suvirinimo būdas (pagal EN ISO 4063)________
Correct Answer(s)
6
5
4
3
2
1
10
7
8
9
Explanation
The correct answer is the order in which the symbols should be placed in the given statement. The symbols represent different aspects of the welding process, such as the length of the weld, the type of weld, the quality class of the weld, etc. The correct order of the symbols is important for accurately describing the welding specifications.
3.
Apsauginių dujų cheminė sudėtis:
________97% Ar + 3% CO2
________CO2 100%
________80% Ar + 20% CO2
________Ar 100%
Correct Answer(s)
3
4
2
1
Explanation
The correct answer is 3,4,2,1. The chemical composition of the protective gas is 97% Ar + 3% CO2, which means that it consists of 97% argon and 3% carbon dioxide. Therefore, the correct order of the blanks is 3 (97% Ar + 3% CO2), 4 (100% CO2), 2 (80% Ar + 20% CO2), and 1 (100% Ar).
4.
Norint gauti gerą, kokybišką, patikimą suvirinimo siūlę, būtina suderinti suvirinimo parametrus. MMA suvirinimo procesą nusako šie suvirinimo parametrai:
Correct Answer(s)
A. Glaisto tipas
B. Elektrodo skermuo, mm
C. Srovės rūšis ir poliškumas
D. Srovės stiprumas, A
E. Elektrodų džiovinimo laikas
F. Suvirinimo padėtis
G. Lanko ilgis, mm
H. Siūlės geometrija
I. Apsauginio skydelio tamsinančio stiklo numeris
J. Elektrodo galo judesiai suvirinimo metu
K. Papildomi rankinio lankinio suvirinimo duomenys
Explanation
The correct answer includes all the welding parameters that need to be considered in order to obtain a good, high-quality, reliable weld. These parameters include the type of flux, electrode diameter, current type and polarity, current strength, electrode drying time, welding position, arc length, weld geometry, shade number of the protective shield glass, electrode movements during welding, and additional data for manual arc welding. Each of these parameters plays a crucial role in determining the quality and characteristics of the weld.
5.
Atsižvelgiant į anglies kiekį, plienai skirstomi į:
Correct Answer(s)
A. Neanglinguosius (iki 0,25% C)
B. Vidutinio anglingumo (0,25-06% C)
C. Labai anglingus (Daugiau kaip 0,6% C)
Explanation
Based on the given information, steel is classified into three categories based on carbon content. Non-alloy steels have a carbon content of up to 0.25%, medium alloy steels have a carbon content ranging from 0.25% to 0.6%, and high alloy steels have a carbon content greater than 0.6%.
6.
Kokie tai žymėjimai? Įrašyk mažosiomis raidėmis a ir b:
Amerikietiškas________
Europietiškas________
Correct Answer(s)
b
a
Explanation
The correct answer is "b,a" because the question asks to write the letters "a" and "b" in lowercase as markings for "Amerikietiškas" and "Europietiškas" respectively.
7.
Ką reiškia šis ženklas?
Correct Answer
D. Bazinis paviršius
Explanation
This Lithuanian question asks for the meaning of a certain symbol. The correct answer is "Bazinis paviršius," which translates to "Base surface" in English.
8.
Vidiniai suvirinimo defektai yra:
Correct Answer(s)
A. Įtrūkimai
B. Neįvirinimai
C. Poros
D. Šlako intarpai
E. Oksidų intarpai
F. Perkaitinta siūlė
Explanation
The correct answer includes various types of internal welding defects such as cracks, lack of fusion, porosity, slag inclusions, oxide inclusions, and overheated weld. These defects can weaken the weld joint and affect its integrity, leading to potential failures or structural issues. It is important to identify and address these defects during welding inspections to ensure the quality and reliability of the welded components or structures.
9.
Išoriniai suvirinimo defektai yra:
Correct Answer(s)
A. Neįvirinimai
B. Surinkimo klaidos
C. Atviros poros
D. Krateriai
E. Užtekėjimai
F. Išorinis oksidavimas
G. Įpjovos
H. Siūlės formos ir matmenų neatitikimas
Explanation
The correct answer includes a list of various welding defects, such as lack of fusion, assembly errors, open pores, craters, excess weld metal, external oxidation, notches, and mismatch of weld size and shape. These defects can occur during the welding process and can negatively impact the quality and integrity of the weld joint.
10.
Kaip galandami TIG elektrodai kintamai srovei?
Correct Answer
A. Užapvalinami
Explanation
TIG elektrodai yra užapvalinami kintamai srovei. This means that TIG electrodes are rounded off for variable current.
11.
Kaip galandinami TIG elektrodai nuolatinei srovei?
Correct Answer
C. 2D t.y. per du elektrodo diametrus max. 5mm
Explanation
The correct answer is 2D, which means that the TIG electrodes are galvanized using two electrode diameters, with a maximum diameter of 5mm. This implies that the TIG electrodes are coated with a layer of zinc or a zinc alloy, which provides corrosion resistance and prolongs the lifespan of the electrodes. Galvanizing the electrodes using two diameters ensures that a sufficient amount of coating is applied, while still maintaining the maximum diameter limit.
12.
Kokie tai suvirinimo procesai pagal LST EN ISO 4063?
________Acetileninis deguoninis suvirinimas
________Rankinis lankinis suvirinimas lydžiuoju elektrodu(lankinis suvirinimas glaistytais elektrodais)
________Lankinis suvirinimas volframo elektrodu inertinėse dujose (TIG suvirinimas)
________Lankinis suvirinimas milteline savisauge viela
________Lankinis suvirinimas lydžiuoju elektrodu inertinėse dujose (MIG suvirinimas)
________Lankinis suvirinimas lydžiuoju elektrodu aktyviose dujose (MAG suvirinimas)
________Lankinis suvirinimas milteline viela aktyviose dujose
________Lankinis suvirinimas milteline viela inertinėse dujose
________Liepsninis pjovimas
________Plazminis pjovimas
Correct Answer
311
111
141
114
131
135
136
137
81
83
Explanation
The correct answer is a combination of different welding processes according to LST EN ISO 4063. These processes include Acetylene-oxygen welding, Manual metal arc welding with covered electrodes, Tungsten inert gas welding, Flux-cored arc welding, Metal inert gas welding, Metal active gas welding, Submerged arc welding, Oxy-fuel gas cutting, and Plasma arc cutting.
13.
Virinant pusautomačiu nuo ko priklauso vielos padavimo greitis?
Correct Answer
C. Nuo srovės stiprumo
Explanation
The speed of wire feed in a welding machine depends on the current strength. The higher the current strength, the faster the wire feed will be.
14.
Koks suvirinimo pusautomačiu didžiausias privalumas prieš kitus suvirinimo būdus?
Correct Answer
B. Didelis suvirinimo greitis
Explanation
The biggest advantage of welding with a semi-automatic welding machine is the high welding speed. This means that the welding process can be completed quickly, saving time and increasing productivity.
15.
Virinant pusautomačiu nuo ko priklauso vielos storis?
Correct Answer
A. Virinamos medžiagos storio
Explanation
The thickness of the weld bead depends on the thickness of the material being welded. Thicker materials require a larger weld bead to ensure proper fusion and strength. Therefore, the correct answer is "Virinamos medžiagos storio" (The thickness of the material being welded).
16.
Pagal ką parenkamas apsauginių dujų debitas?
Correct Answer(s)
A. Pagal vielos skersmenį
B. Pagal amperažą
17.
Kur yra a, z, s, pažymėkite šiuos matmenis?
1. ________
2. ________
3. ________
Correct Answer(s)
z
a
s
Explanation
The correct answer is z,a,s. This is because the question asks for the locations of a, z, and s, and the given answer correctly identifies these locations as z, a, and s.
18.
Kokios spalvos volframo elektrodas naudojamas virinant aliuminį?
Correct Answer
C. Žalias
Explanation
The correct answer is "Žalias" (Green). In welding, a green tungsten electrode is commonly used when welding aluminum. This is because the green electrode is made of pure tungsten, which has a high melting point and good heat resistance. It is able to withstand the high temperatures required for welding aluminum without melting or deteriorating. Additionally, the green color helps to differentiate it from other types of tungsten electrodes used for different materials.
19.
Kokios spalvos volframo elektrodas naudojamas virinant nerūdijantį plieną?
Correct Answer(s)
A. Raudonas
B. Juodas
Explanation
The correct answer is Raudonas, Juodas.
20.
Kokia temperatūra būna degant acetileno dujoms deguonyje?
Correct Answer
C. 3100
Explanation
The correct answer is 3100. This is the temperature at which acetylene gas burns in oxygen.
21.
Kokia temperatūra būna degant probano-butano dujoms deguonyje?
Correct Answer
A. 2400
Explanation
The correct answer is 2400. This temperature is the burning temperature of propane-butane gas in oxygen.
22.
Su kuo susilietęs deguonis sprogsta?
Correct Answer
A. Tepalu
Explanation
Deguonis sprogsta susilietus su tepalu. Tepalas yra degi medžiaga, todėl, susilietus su deguonimi, gali įvykti cheminė reakcija, kuri sukelia sprogimą. Vandeniu ir propanu deguonis nesprogsta, todėl jie netinkami atsakymai.
23.
Koks metalas ilgai kontaktuodamas su acetilenu, sudaro sprogų junginį?
Correct Answer
A. Varis
Explanation
When copper comes into prolonged contact with acetylene, it forms an explosive compound.
24.
Kas yra SPA (WPS)?
Correct Answer
C. Suvirinimo procedūros aprašas
Explanation
The correct answer is "Suvirinimo procedūros aprašas" which translates to "Welding procedure description" in English. This answer is supported by the fact that the acronym "SPA" stands for "suvirinimo procedūros aprašas" in Lithuanian, which directly translates to "welding procedure description" in English.
25.
Ką nurodo šis ženklas (geltonam fone)?
Correct Answer
C. Oksiduojančios medžiagos
Explanation
This sign indicates oxidizing substances.
26.
Ką nurodo šis ženklas (baltame fone, raudonai apibraukta)?
Correct Answer
C. Draudžiama gerti
Explanation
This sign, indicated by a red outline on a white background, prohibits drinking.
27.
Virinant MIG/MAG pusautomačiu dažnai reikia tikrinti ir valyti:
Correct Answer
C. Valyti degiklio angalį
Explanation
The correct answer is "Valyti degiklio angalį" which means "Clean the burner chamber" in English. In MIG/MAG welding with automatic machines, it is necessary to regularly clean the burner chamber to ensure proper functioning and prevent any blockages or buildup of debris. This helps maintain the quality of the weld and prolong the lifespan of the equipment.