MCQOPTIONS
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MCQOPTIONS
This section includes 657 Mcqs, each offering curated multiple-choice questions to sharpen your Testing Subject knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
Steady state direct axis reactance is greater than subtransient direct axis reactance and transient direct axis reactance. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 2. |
Which of the following reactance is eliminated first in synchronous generator just after the symmetrical fault? |
| A. | Leakage reactance |
| B. | Damper winding reactance |
| C. | Armature winding reactance |
| D. | Field winding reactance |
| Answer» C. Armature winding reactance | |
| 3. |
What is the phase current in phase Y and in phase B out of R-Y-B when sudden short circuit to all three phases occurs at no load? It is given that after fault current in phase R is equal (Vm Sin t) |
| A. | Y = V<sub>m</sub> Sin( t +60 ) & B = V<sub>m</sub>Sin( t +120 ) |
| B. | Y = V<sub>m</sub> Sin( t +120 ) & B = V<sub>m</sub>Sin( t+240 ) |
| C. | Y = V<sub>m</sub> Sin( t +240 ) & B = V<sub>m</sub> Sin( t +120 ) |
| D. | Y = V<sub>m</sub> Sin( t +90 ) & B = V<sub>m</sub> Sin( t -90 ) |
| Answer» C. Y = V<sub>m</sub> Sin( t +240 ) & B = V<sub>m</sub> Sin( t +120 ) | |
| 4. |
In a synchronous generator for how much time transient period of symmetrical short circuit current lasts? |
| A. | For 200 Cycles |
| B. | For 500 Cycles |
| C. | For 30 Cycles |
| D. | For 2 Cycles |
| Answer» D. For 2 Cycles | |