Important Paper Electrical Engineering
1. Which electrical device is used to reduce the are produced between conductors :
(1) Capacitor
(2) Resistance
(3) Diode
(4) Transistor
Ans (1)
2. In are welding, once the are is struck, the voltage required to maintain it will be
(1) )20 - 30) v
(2) (100 - 120) v
(3) (200 - 220) v
(4) (500 - 1000) v.
Ans (1)
3. Which of the following is not a welding accessory ?
(1) Cable
(2) Electrode holder
(3) Hand screen
(4) Gloves
Ans (1)
4. In helium arc welding , the electrode is made of -
(1) Copper
(2) Carbon
(3) mild steel
(4) Tungsten
Ans (4)
5. During the resistance welding, the heat produced at the joint is proportinal to ?
(1)Volt - Ampere
(2) Voltage
(3) Current
(4) I2 R
Ans (4)
6. Electric arc welding process produces temperature upto
(1) 1000° C
(2) 1500° C
(3) 3500° C
(4) 5550° C.
Ans (4)
7. During the resistance welding heat produced at the joint is proportional to
(1) I2R
(2) kVA
(3) Current
(4) Voltage
Ans (1)
8. The minimum dielectric stress in a cable is at
(1) armour
(2) bedding
(3) conductor surface
(4) lead sheath
Ans (4)
9. Power-factor of industrial are and induction furnace is :
(1) High lagging
(2) High leading
(3) Low lagging
(4) Very low lagging
Ans (4)
10. For are heating , the electrodes are made of :
(1) Copper
(2) Aluminium ium
(3) graphite
(4) ACSR conductor
Ans (3)
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