MCQOPTIONS
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MCQOPTIONS
This section includes 6 Mcqs, each offering curated multiple-choice questions to sharpen your Electrical Engineering knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
A 3-phase moving coil type power factor meter has three fixed and symmetrically spaced current coils, inside of which are three other similarly placed moving potential coils. While in operation, rotating magnetic field is produced |
| A. | in the current coils but not in the potential coils |
| B. | in the potential coils but not in the current coils |
| C. | in both potential coil and the current coils |
| D. | in neither the potential coils nor the current coils |
| Answer» D. in neither the potential coils nor the current coils | |
| 2. |
In vector impedance meter, the coverage of instrument can be obtained with |
| A. | V-I characteristics of the test system |
| B. | Power-frequency plot |
| C. | sweep frequency plots of impedance and phase angle versus frequency |
| D. | voltage-angle plot |
| Answer» D. voltage-angle plot | |
| 3. |
Power factor of saw mill is about |
| A. | 0.5 |
| B. | 0.8 |
| C. | 0.1 |
| D. | 0.9 |
| Answer» B. 0.8 | |
| 4. |
In a digital frequency meter, the Schmitt trigger is used for |
| A. | converting sinusoidal waveforms into rectangle pulses |
| B. | scaling of sinusoidal waveforms |
| C. | providing timebase |
| D. | triggering a start pulse |
| Answer» B. scaling of sinusoidal waveforms | |
| 5. |
For measurement of which of the following is a Low Power Factor (LPF) wattmeter NOT suitable? |
| A. | Measurement of power in inductive loads |
| B. | Open circuit test on single phase transformer |
| C. | Measurement of power in resistive loads |
| D. | Load test on induction motor |
| Answer» D. Load test on induction motor | |
| 6. |
A pointer is connected to the spindle of a dynamometer type phase angle meter. The two light coils of the phase angle meter mounted on the spindle |
| A. | carry equal amount of currents in phase with each other and develop torques opposing each other |
| B. | carry unequal amount of currents in phase with each other and develop torques opposing each other |
| C. | carry equal amount of currents at quadrature to each other and develop torques opposing each other |
| D. | carry the load current and develop the magnetic field required for the meter |
| Answer» B. carry unequal amount of currents in phase with each other and develop torques opposing each other | |