Top Electrical Engg MCQ - 500+ MCQ
221
The charging current in cables
222
Interlocking is not possible in which type of fuse
223
A factory runs in 3 shifts of 8 hours each, in which it consumes 30 kW, 15 kW and 25 kW in each shift respectively. Calculate the energy (in kWh) consumed by the factory per day.
224
Which of the following can measure the resistance having value below 1 Ohms most precisely?
225
Which of the following motors is universally preferred for heavy electric traction (like locomotives)?
226
A 3-phase, 4 wire system is commonly used on ____.
227
The collector current is I_C = β * I_B + (1 + β) * I_CBO. I_C = (49 * 95µA) + (50 * 5µA) = 4655µA + 250µA = 4905 µA = 4.905 mA. The emitter current is I_E = I_C + I_B = 4.905 mA + 0.095 mA = 5 mA. 22. A transistor connected in a common base configuration has the following readings: IE = 2 mA and IB =20 µA, Find the current gain α.
228
The critical resistance of a DC shunt generator is the resistance of:
229
What is the types of insulator used at dead ends and on straight lines as suspension type for voltages 3.3 kV and above?
230
Calculate the value of emitter current for a transistor with αdc = 0.98, ICBO = 5µA and IB = 95 µA.
231
A simple method of increasing the voltage of a DC generator is ____.
232
The chemical used in the breather of a transformer to absorb moisture is:
233
Synchronous motors are ____.
234
A 20 kVA, 2000 V/200V, 2-winding transformer, when used as an auto transformer with constant voltage source of 2000 V, is capable of handing
235
The core of a transformer is laminated to minimize:
236
Which of the following motors has a squirrel-cage winding embedded in the armature under the regular winding?
237
The primary purpose of equipment grounding (earthing) in electrical installations is to:
238
What will be the peak value of voltage (in V) of a voltage waveform, when the root mean square value of the voltage is 30 V?
239
Figure given below represents a
240
A relay used on short transmission lines is……