MCQOPTIONS
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MCQOPTIONS
This section includes 214 Mcqs, each offering curated multiple-choice questions to sharpen your Electrical Engineering Questions knowledge and support exam preparation. Choose a topic below to get started.
| 201. |
Capacitors for power factor correction are rated in_________? |
| A. | kW |
| B. | kVA |
| C. | kV |
| D. | kVAR |
| Answer» E. | |
| 202. |
Capacitive susceptance is a measure of__________? |
| A. | reactive power in a circuit |
| B. | the extent of neutralisation of reactive power in a circuit |
| C. | a purely capacitive circuit’s ability to pass current |
| D. | a purely capacitive circuit’s ability to resist the flow of current |
| Answer» D. a purely capacitive circuit’s ability to resist the flow of current | |
| 203. |
Capacitive reactance is more when_______? |
| A. | capacitance is less and frequency of supply is less |
| B. | capacitance is less and frequency of supply is more |
| C. | capacitance is more and frequency of supply is less |
| D. | capacitance is more and frequency of supply is more |
| Answer» B. capacitance is less and frequency of supply is more | |
| 204. |
At very low frequencies a series R-C circuit behaves as almost purely___________? |
| A. | resistive |
| B. | inductive |
| C. | capacitive |
| D. | none of the above |
| Answer» D. none of the above | |
| 205. |
At _______ frequencies the parallel R-L circuit behaves as purely resistive |
| A. | low |
| B. | very low |
| C. | high |
| D. | very high |
| Answer» E. | |
| 206. |
Aphasoris________? |
| A. | a line which represents the magnitude and phase of an alternating quantity |
| B. | a line representing the magnitude and direction of an alternating quantity |
| C. | a coloured tag or band for distinction between different phases of a 3-phase supply |
| D. | an instrument used for measuring phases of an unbalanced 3-phase load |
| Answer» B. a line representing the magnitude and direction of an alternating quantity | |
| 207. |
An A.C. voltage is impressed across a pure resistance of 3.5 ohms in parallel with a pure inductance of impedance of 3.5 ohms? |
| A. | the current through the resistance is more |
| B. | the current through the resistance is less |
| C. | both resistance and inductance carry equal currents |
| D. | none of the above |
| Answer» D. none of the above | |
| 208. |
All the rules and laws of D.C. circuit also apply to A.C. circuit containing_____________? |
| A. | capacitance only |
| B. | inductance only |
| C. | resistance only |
| D. | all above |
| Answer» D. all above | |
| 209. |
All definitions of power factor of a series R-L-C circuit are correct except__________? |
| A. | ratio of net reactance and impedance |
| B. | ratio of kW and kVA |
| C. | ratio of J and Z |
| D. | ratio of W and VA |
| Answer» B. ratio of kW and kVA | |
| 210. |
A sine wave has a frequency of 50 Hz. Its angular frequency is ________ radian/second. |
| A. | 100 n |
| B. | 50 jt |
| C. | 25 JT |
| D. | 5 n |
| Answer» B. 50 jt | |
| 211. |
A pure inductance connected across 250 V, 50 Hz supply consumes 100 W. This consumption can be attributed to_________? |
| A. | the big size of the inductor |
| B. | the reactance of the inductor |
| C. | the current flowing in the inductor |
| D. | the statement given is false |
| Answer» E. | |
| 212. |
A pure capacitor connected across an A.C. voltage consumed 50 W. This is due to________? |
| A. | the capacitive reactance in ohms |
| B. | the current flowing in capacitor |
| C. | the size of the capacitor being quite big |
| D. | the statement is incorrect |
| Answer» E. | |
| 213. |
A parallel AC. circuit in resonance will__________? |
| A. | have a high voltage developed across each inductive and capacitive section |
| B. | have a high impedance |
| C. | act like a resistor of low value |
| D. | have current in each section equal to the line current |
| Answer» C. act like a resistor of low value | |
| 214. |
A heater is rated as 230 V, 10 kW, A.C. The value 230 V refers to__________? |
| A. | average voltage |
| B. | r.m.s. voltage |
| C. | peak voltage |
| D. | none of the above |
| Answer» C. peak voltage | |