DC Generator Efficiency MCQ Quiz in मराठी - Objective Question with Answer for DC Generator Efficiency - मोफत PDF डाउनलोड करा

Last updated on Apr 17, 2025

पाईये DC Generator Efficiency उत्तरे आणि तपशीलवार उपायांसह एकाधिक निवड प्रश्न (MCQ क्विझ). हे मोफत डाउनलोड करा DC Generator Efficiency एमसीक्यू क्विझ पीडीएफ आणि बँकिंग, एसएससी, रेल्वे, यूपीएससी, स्टेट पीएससी यासारख्या तुमच्या आगामी परीक्षांची तयारी करा.

Latest DC Generator Efficiency MCQ Objective Questions

Top DC Generator Efficiency MCQ Objective Questions

DC Generator Efficiency Question 1:

A shunt generator delivers 160 A at terminal voltage of 220V. The armature resistance and shunt field resistance are 0.06 and 90 Ω respectively. The iron and friction losses are 700 W. What are mechanical, commercial and electrical efficiencies for generator respectively?

  1. 98.16%, 94.32%, 92.58%

  2. 92.58%, 98.16%, 94.32%

  3. 98.16%, 92.58%, 94.32%

  4. 94.32%, 98.16%, 92.58%

Answer (Detailed Solution Below)

Option 3 :

98.16%, 92.58%, 94.32%

DC Generator Efficiency Question 1 Detailed Solution

Current in shunt field, Ish=22090 

= 2.44 A

Armature emf, E = V + Iara

= 220 + (160 + 2.44) × 0.06   

= 229.75 V

Armature copper loss =Ia2ra

=(162.44)2×0.06

= 1583 W  

Shunt Cu loss = VIsh

= 220 × 2.44

= 536.8 W

Total cu loss = 2119.8 W

Stray losses = 700 W

Total losses = 2819.8 W  

o/P=VI=220×160

= 35200 W

I/P Provided by prime mover

= 35200 + 2819.8

= 38019.8 W

= Generator i/P

Electrical power produced in armature

= EgIa = 38019.8 – 700

= 37319.8 W

Mechanical Efficiency =εgIaPrime moverIP=37319.838019.8

= 0.9816

= 98.16%

Electrical efficiency =VIEgIa=3520037319.8

= 94.32%

Commercial efficiency =3520038019.8

= 92.58%

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