Electrical Engineering (EE) Exam  >  Electrical Engineering (EE) Questions  >  Two 490 kW transformers each has a maximum ef... Start Learning for Free
Two 490 kW transformers each has a maximum efficiency of 98%, but in one the max efficiency occurs at full load while in other, it occurs at half load. Each transformer is on full load for 4 hours, on half load for 6 hours and on one tenth load for 14 hours per day
Q. 
The all day efficiency of transformer 2 is _____
  • a)
    98.0%    
  • b)
    95.6%
  • c)
    96.7%    
  • d)
    97.6%
Correct answer is option 'C'. Can you explain this answer?
Verified Answer
Two 490 kW transformers each has a maximum efficiency of 98%, but in o...




View all questions of this test
Most Upvoted Answer
Two 490 kW transformers each has a maximum efficiency of 98%, but in o...
Calculation of Efficiency at different loads

For transformer 1:

- Maximum efficiency occurs at full load, which is 98%
- On full load for 4 hours, efficiency = 98%
- On half load for 6 hours, efficiency = 0.98 x (0.5)^2 = 0.245 or 24.5%
- On one-tenth load for 14 hours, efficiency = 0.98 x (0.1)^2 = 0.0098 or 0.98%

For transformer 2:

- Maximum efficiency occurs at half load, which is also 98%
- On full load for 4 hours, efficiency = 0.98 x (0.5)^2 = 24.5%
- On half load for 6 hours, efficiency = 98%
- On one-tenth load for 14 hours, efficiency = 0.98 x (0.1)^2 = 0.0098 or 0.98%

Calculation of All day efficiency

- Total energy consumed by transformer 1 = (490 kW x 4 hours) + (245 kW x 6 hours) + (49 kW x 14 hours) = 4,900 kWh
- Total energy output by transformer 1 = 4,900 kWh x 0.98 = 4,802 kWh
- All day efficiency of transformer 1 = (4,802 kWh / 4,900 kWh) x 100% = 97.99% or 98.0%
- Total energy consumed by transformer 2 = (245 kW x 4 hours) + (490 kW x 6 hours) + (49 kW x 14 hours) = 4,900 kWh
- Total energy output by transformer 2 = 4,900 kWh x 0.967 = 4,731.3 kWh
- All day efficiency of transformer 2 = (4,731.3 kWh / 4,900 kWh) x 100% = 96.67% or 96.7%

Therefore, the all day efficiency of transformer 2 is 96.7%.
Explore Courses for Electrical Engineering (EE) exam

Similar Electrical Engineering (EE) Doubts

Top Courses for Electrical Engineering (EE)

Two 490 kW transformers each has a maximum efficiency of 98%, but in one the max efficiency occurs at full load while in other, it occurs at half load. Each transformer is on full load for 4 hours, on half load for 6 hours and on one tenth load for 14 hours per dayQ.The all day efficiency of transformer 2 is _____a)98.0% b)95.6%c)96.7% d)97.6%Correct answer is option 'C'. Can you explain this answer?
Question Description
Two 490 kW transformers each has a maximum efficiency of 98%, but in one the max efficiency occurs at full load while in other, it occurs at half load. Each transformer is on full load for 4 hours, on half load for 6 hours and on one tenth load for 14 hours per dayQ.The all day efficiency of transformer 2 is _____a)98.0% b)95.6%c)96.7% d)97.6%Correct answer is option 'C'. Can you explain this answer? for Electrical Engineering (EE) 2024 is part of Electrical Engineering (EE) preparation. The Question and answers have been prepared according to the Electrical Engineering (EE) exam syllabus. Information about Two 490 kW transformers each has a maximum efficiency of 98%, but in one the max efficiency occurs at full load while in other, it occurs at half load. Each transformer is on full load for 4 hours, on half load for 6 hours and on one tenth load for 14 hours per dayQ.The all day efficiency of transformer 2 is _____a)98.0% b)95.6%c)96.7% d)97.6%Correct answer is option 'C'. Can you explain this answer? covers all topics & solutions for Electrical Engineering (EE) 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Two 490 kW transformers each has a maximum efficiency of 98%, but in one the max efficiency occurs at full load while in other, it occurs at half load. Each transformer is on full load for 4 hours, on half load for 6 hours and on one tenth load for 14 hours per dayQ.The all day efficiency of transformer 2 is _____a)98.0% b)95.6%c)96.7% d)97.6%Correct answer is option 'C'. Can you explain this answer?.
Solutions for Two 490 kW transformers each has a maximum efficiency of 98%, but in one the max efficiency occurs at full load while in other, it occurs at half load. Each transformer is on full load for 4 hours, on half load for 6 hours and on one tenth load for 14 hours per dayQ.The all day efficiency of transformer 2 is _____a)98.0% b)95.6%c)96.7% d)97.6%Correct answer is option 'C'. Can you explain this answer? in English & in Hindi are available as part of our courses for Electrical Engineering (EE). Download more important topics, notes, lectures and mock test series for Electrical Engineering (EE) Exam by signing up for free.
Here you can find the meaning of Two 490 kW transformers each has a maximum efficiency of 98%, but in one the max efficiency occurs at full load while in other, it occurs at half load. Each transformer is on full load for 4 hours, on half load for 6 hours and on one tenth load for 14 hours per dayQ.The all day efficiency of transformer 2 is _____a)98.0% b)95.6%c)96.7% d)97.6%Correct answer is option 'C'. Can you explain this answer? defined & explained in the simplest way possible. Besides giving the explanation of Two 490 kW transformers each has a maximum efficiency of 98%, but in one the max efficiency occurs at full load while in other, it occurs at half load. Each transformer is on full load for 4 hours, on half load for 6 hours and on one tenth load for 14 hours per dayQ.The all day efficiency of transformer 2 is _____a)98.0% b)95.6%c)96.7% d)97.6%Correct answer is option 'C'. Can you explain this answer?, a detailed solution for Two 490 kW transformers each has a maximum efficiency of 98%, but in one the max efficiency occurs at full load while in other, it occurs at half load. Each transformer is on full load for 4 hours, on half load for 6 hours and on one tenth load for 14 hours per dayQ.The all day efficiency of transformer 2 is _____a)98.0% b)95.6%c)96.7% d)97.6%Correct answer is option 'C'. Can you explain this answer? has been provided alongside types of Two 490 kW transformers each has a maximum efficiency of 98%, but in one the max efficiency occurs at full load while in other, it occurs at half load. Each transformer is on full load for 4 hours, on half load for 6 hours and on one tenth load for 14 hours per dayQ.The all day efficiency of transformer 2 is _____a)98.0% b)95.6%c)96.7% d)97.6%Correct answer is option 'C'. Can you explain this answer? theory, EduRev gives you an ample number of questions to practice Two 490 kW transformers each has a maximum efficiency of 98%, but in one the max efficiency occurs at full load while in other, it occurs at half load. Each transformer is on full load for 4 hours, on half load for 6 hours and on one tenth load for 14 hours per dayQ.The all day efficiency of transformer 2 is _____a)98.0% b)95.6%c)96.7% d)97.6%Correct answer is option 'C'. Can you explain this answer? tests, examples and also practice Electrical Engineering (EE) tests.
Explore Courses for Electrical Engineering (EE) exam

Top Courses for Electrical Engineering (EE)

Explore Courses
Signup for Free!
Signup to see your scores go up within 7 days! Learn & Practice with 1000+ FREE Notes, Videos & Tests.
10M+ students study on EduRev