Question

In: Electrical Engineering

Please answer the following questions in "Energy Efficiency Basics" multiple choice: QUESTION 7 An electrical system...

Please answer the following questions in "Energy Efficiency Basics" multiple choice:

QUESTION 7
An electrical system has 52.9 kVA and 50.5 kW. How many kVARs of capacitance are required to correct the power factor of the total load to 95%? a. 10.8 kVARs
a 0 kVARs
b 20 kVARs
c 35 kVARs
d 75 kVARs

QUESTION 8
You find that you can replace a 50 kW motor with a 5 kW motor by cutting the total air flow requirements, given than ( motor running time is 8,750 hours/year, efficiency 90% for both motors, demand charge $ 9 /kW-month, energy charge $0.05/kWh fuel adjustment cost $0.005/kwh). Calculate the dollar savings ?
a $ 29,490
b $20,400
c $22,090
d $14,010

QUESTION 9
An air handler delivers 1,200 L/s of air at 10 ºC. When the air arrives at the space to be cooled, it is 20 ºC. How many kW of air conditioning capacity has been lost?
a 6 kW
b 14.4 kW
c 12.1 kW
d 20 kW

QUESTION 10
If a 75-kW fan motor has a VSD installed that slows down the fan by 20% what is the effect on air flow rate and the kW savings?
a 20% CFM reduction, and 36.6 kW savings
b 80% CFM reduction, and 51.2 kW savings
c 20% CFM reduction, and 20 kW savings
d 20% CFM reduction, and 37.4 kW savings

QUESTION 11
In a given facility you measure the incoming supply 3 phase voltage and you find the following voltages present. 236V 231V 227V. What impact is this likely to have on the motor load in the installation? imbalance?
a Increase motor losses by approx. 7%
b Increase motor losses by approx. 15%
c Reduce motor losses by approx. 7%
d Reduce motor losses by approx. 15%

Solutions

Expert Solution


Related Solutions

Please, faster Please answer the following questions in "Energy Efficiency Basics" multiple choice: Which knowledge in...
Please, faster Please answer the following questions in "Energy Efficiency Basics" multiple choice: Which knowledge in the hands of an industrial consumer is most likely to lead to discovery of the most valuable energy cost savings? The total energy bill The energy bill split between sub-divisions of the plant The energy bill split between end-uses on the plant Time-based energy consumption profiles per end-use السؤال 12 A facility has a demand ratchet rate structure of 75%. In the current billing...
Please, faster Please answer the following questions in "Energy Efficiency Basics" multiple choice: 14 An air...
Please, faster Please answer the following questions in "Energy Efficiency Basics" multiple choice: 14 An air handler delivers 1,200 L/s of air at 10 ºC. When the air arrives at the space to be cooled, it is 20 ºC. How many kW of air conditioning capacity has been lost? 6 kW 14.4 kW 12.1 kW 20 kW السؤال 15 Why do utilities charge a power factor charge? The utility has to deliver more current for the same kW billed The...
Please, faster Please answer the following questions in "Energy Efficiency Basics" multiple choice: السؤال 16 A...
Please, faster Please answer the following questions in "Energy Efficiency Basics" multiple choice: السؤال 16 A 20 kW electric roof top A/C unit (RTU) is 10 years old, and has a COP of 2.0 . It operates at full load for 3,000 hours a year. The electric cost is $0.10 per kWh. If this to unit to be replaced with a new 20 kW, what is the minimum value of COP for the new unit to reach an annual savings...
Basics Energy Efficiency Choose the correct answer : QUESTION 12 Which knowledge in the hands of...
Basics Energy Efficiency Choose the correct answer : QUESTION 12 Which knowledge in the hands of an industrial consumer is most likely to lead to discovery of the most valuable energy cost savings? a-The total energy bill b-The energy bill split between sub-divisions of the plant c-The energy bill split between end-uses on the plant d-Time-based energy consumption profiles per end-use QUESTION 13 Suppose that we have a motor three phase voltages as 404, 395 and 380 volts. Calculate the...
Please answer the following multiple choice questions -- explain too please 1. Blood flow in the...
Please answer the following multiple choice questions -- explain too please 1. Blood flow in the coronary circulation a. increases during systole b. increases during diastole 2. Oncotic pressure normally helps to draw fluid into a. arterial ends of capillaries b. interstitial fund c. venous ends of capillaries 3. If a blood vessel is vasocontricted a. the region in front of the constriction will have increased blood pressure and the region after the constriction will have reduced blood pressure b....
In a multiple choice exam, there are 7 questions and 4 choices for each question (a,...
In a multiple choice exam, there are 7 questions and 4 choices for each question (a, b, c, d). Nancy has not studied for the exam at all and decides to randomly guess the answers. What is the probability that: (please round all answers to four decimal places) a) the first question she gets right is question number 3? b) she gets all of the questions right? c) she gets at least one question right?
Please answer the multiple choice question. Only choose one answer choice. Then write an IRAC answer...
Please answer the multiple choice question. Only choose one answer choice. Then write an IRAC answer about the issue that is being tested. Peter built a small pond in front of his house for his prize koi fish. The pond was visible from the sidewalk. To keep people and animals away, Peter constructed an eight-foot high chain link fence between the sidewalk and the pond. One day, Stewie, a six-year­ old who lived next door, struggled over the fence to...
QUESTION 1 (10 marks) (12 minutes) Answer the following multiple-choice questions. Indicate your choice by selecting...
QUESTION 1 (12 minutes) Answer the following multiple-choice questions. Indicate your choice by selecting only one option from the four options given for each question answered. (a) Which one of the following is not considered to be an enhancing qualitative characteristic to ensure the usefulness of information that is already relevant and faithfully represented in terms of The Conceptual Framework for Financial Reporting 2018? 1) Completeness; 2) Comparability; 3) Timeliness; 4) Understandability. (b) Which one of the following is not...
QUESTION 1 (10 marks) Answer the following multiple-choice questions. Indicate your choice by selecting only one...
QUESTION 1 Answer the following multiple-choice questions. Indicate your choice by selecting only one option from the four options given for each question answered. (a) Which one of the following is not considered to be an enhancing qualitative characteristic to ensure the usefulness of information that is already relevant and faithfully represented in terms of The Conceptual Framework for Financial Reporting 2018? 1) Completeness; 2) Comparability; 3) Timeliness; 4) Understandability. (b) Which one of the following is not an objective...
Can someone please answer the following 10 Multiple choice questions? Thank you. An analyst needs to...
Can someone please answer the following 10 Multiple choice questions? Thank you. An analyst needs to build a forecasting model but he is not sure whether it has trend or seasonality components. Which of the following can help the analyst build decide on the forecasting model. Check all that apply. Assume it has only seasonality but not trend, because time series with trend are rare. Try different models and pick the best one. Try plotting the time series and visually...
ADVERTISEMENT
ADVERTISEMENT
ADVERTISEMENT