SSC JE Electrical 2019 with solution SET-1 An alternator has 9 slots/pole. What is the value of the pitch factor if each coil spans 8 slot pitches Cos 30° Cos 60° Cos 45° Cos 10° Cos 30° Cos 60° Cos 45° Cos 10° ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Coil Span = 8Pole Pitch = 9 slots/poleSlot angle (α) = 180° / Pole Pitch = 180°/9 = 20°Pitch Factor = cos(α/2) = cos (20/2)Pitch Factor = cos 10°
SSC JE Electrical 2019 with solution SET-1 The annual load factor of a generation station is equal to (No. of units actually supplied per year) ⁄ (Max. possible demand) (No. of units actually supplied per year) ⁄ (Max. possible demand × 8760) (No. of units actually supplied per year) ⁄ (Max. possible demand) (No. of units actually supplied per month) ⁄ (Max. possible demand × 8760) (No. of units actually supplied per year) ⁄ (Max. possible demand) (No. of units actually supplied per year) ⁄ (Max. possible demand × 8760) (No. of units actually supplied per year) ⁄ (Max. possible demand) (No. of units actually supplied per month) ⁄ (Max. possible demand × 8760) ANSWER DOWNLOAD EXAMIANS APP
SSC JE Electrical 2019 with solution SET-1 The ratio of average energy demand to maximum demand during a specific period in Form factor Power factor Load factor Utilization factor Form factor Power factor Load factor Utilization factor ANSWER EXPLANATION DOWNLOAD EXAMIANS APP The ratio of average energy demand to maximum demand during a specific period is called the load factor.Load Factor = Average Load/Maximum Demand
SSC JE Electrical 2019 with solution SET-1 The below symbol which is used in single line diagrams represents Power transformer Circuit breaker Potential transformer Current transformer Power transformer Circuit breaker Potential transformer Current transformer ANSWER DOWNLOAD EXAMIANS APP
SSC JE Electrical 2019 with solution SET-1 When the supply to the excitation fails, the synchronous generator acts like a/an Synchronous motor Induction motor Synchronous generator Induction generator Synchronous motor Induction motor Synchronous generator Induction generator ANSWER DOWNLOAD EXAMIANS APP
SSC JE Electrical 2019 with solution SET-1 A coil is wound with 50 turns and a current 8A produces a flux of 200μWb. Calculate the inductance of the coil 0.25 mH 0.125 mH 1.25 mH 2.5 mH 0.25 mH 0.125 mH 1.25 mH 2.5 mH ANSWER EXPLANATION DOWNLOAD EXAMIANS APP The inductance of the coil is given by the relationL = Nφ/IWhereN = number of turns = 50φ = flux = 200μWbI = current = 8 AL = 50 × 200 × 10−6 ⁄ 8L = 1.25 mH
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