Test savollari variant №1. Inson xayoti uchun qaysi tok kuchi havfli?

105. Magnit eng engil metall bulib uning zichligi 1,74 g/sm³ erish xarorati necha graduss

A) 300⁰ S

B) 1000⁰ S

C) 651⁰ S

D) 7000⁰ S

106. Javoblardan titanning suyuklanish xaroratini kursating?

A) 1680⁰ S

B) 1800⁰ S

C) 2000⁰ S

D) 1080⁰ S

107. Payvandlash tokning kattaligi elektrod sterjenni diametrining xar 1 mm ga necha a xisobidan olinadi?

A) 40-60 a

B) 20-30a

C) 80-90 a

D) 70-80 a

108. 8 mm kalinlikdagi metall uchun elektrod diametri necha mm bulishi kerak.

A) 7-10 mm

B) 4-5 mm

C) 2-3 mm

D) 8-12 mm

109. Simlarning payvandlash apparatlaridan ish joyiga bo’lgan uzunliklari necha

metrdan oshmasligi kerak?

A) 30-40 m

B) 3-5 m

C) 100-200 m

D) 8-15 m

110. Payvandlash o’zgartgichning payvandlash toki nima bilan rostlanadi?

A) generator bilan.

B) to’g’irlagich bilan.

C) voltmeter bilan.

D) reostat bilan.

111. Muzlab qolgan generatorni nima bilan isitadi? (isitish kerak)

1. 
   A) Ochiq olovda
   
2. 
   B) Par bilan
   
3. 
   S) Par bilan suvga botirilgan paxta bilan
   
4. 
   D) Yopiq olovda.