Lucknow Metro Questions

---

---

Q1:- Bulk oil circuit breakers are suitable for 

1. low voltage systems 
2. high voltage systems
3. medium voltage systems
4. extra high voltage system 

ANSWER:- 1

---

---

Q2:- Which of the following is symmetrical fault ?

1. three phase short circuits 
2. three phase short circuit with different fault impedance 
3. line to line fault 
4. line to ground fault 

ANSWER:-1

---

---

Q3:- Four lamps of 100 watt each are connected in parallel to 240 volt supply . the equivalent resistance of the circuit will be 

1. 300 ohm 
2. 33.33 ohm 
3. 1728 ohm 
4. 192 ohm 

ANSWER:-4

---

---

Q4:- When AC voltage is applied across pure resistance pure inductor and pure capacitor separately the true statement is 

1. V&I are in phase for inductor, V leads I for resistance & I leads V for capacitor 
2. V&I are in phase for resistor V leads I for capacitor & I leads V for inductor 
3. V&I are in phase for resistor , V leads I for inductor & I leads V for for capacitor 
4. V&I are in phase for capacitor ,V leads I for inductor &
   I leads V for resistor 

ANSWER:-3

---

---

Q5:- In RLC series circuit with constant voltage source but of frequency varaying from zero to infinity . the ckt is said to be in electrical reasonace when 

1. magnitude of inductance =capacitance and Z is not equal to R
2. magnitude of inductance = capacitance and Z=R
3. magnitude of inductance > capacitance and Z is not equal to R
4. magnitude of inductance < capacitance and Z is not equal to R

ANSWER:-2

---

---