SAT College

Example 7.26 A hall 30m Long and 12m wide is to be illuminated and illumination required is 50 matre Candles Five types of lamps having lumen outputs as given below are available 300 500 1.000 Lumens 1.615 3.650 4.700 9.950 21.500 Taking a depeciation factor of 1.3 and utilisation coefficient of the number of lamps needed in each case to produce required illumination out of above five types of lamps select most suitable type and design a Suitable scheme and make a sketch showing Location of lamps Assuma asuitable mounting height and calculate space-heigh ration of lamps ​

Answers

Answer 1

Answer:

Area of the hall = length x width = 30m x 12m = 360 sq. m

Illumination required = 50 meter-candles

Total lumens required = area x illumination required = 360 x 50 = 18,000 lumens

Now, we can find the number of lamps needed for each type of lamp by dividing the total lumens required by the lumen output of each lamp, and then accounting for the depreciation factor and utilization coefficient:

For 300 lumen lamp: (18,000 / 300) x 1.3 x 0.4 = 31.2 lamps (round up to 32 lamps)

For 500 lumen lamp: (18,000 / 500) x 1.3 x 0.4 = 22.9 lamps (round up to 23 lamps)

For 1000 lumen lamp: (18,000 / 1000) x 1.3 x 0.4 = 13.5 lamps (round up to 14 lamps)

For 1615 lumen lamp: (18,000 / 1615) x 1.3 x 0.4 = 8.6 lamps (round up to 9 lamps)

For 3650 lumen lamp: (18,000 / 3650) x 1.3 x 0.4 = 3.9 lamps (round up to 4 lamps)

For 4700 lumen lamp: (18,000 / 4700) x 1.3 x 0.4 = 3 lamps (round up to 3 lamps)

For 9950 lumen lamp: (18,000 / 9950) x 1.3 x 0.4 = 1.4 lamps (round up to 2 lamps)

For 21500 lumen lamp: (18,000 / 21500) x 1.3 x 0.4 = 0.9 lamps (round up to 1 lamp)

The most suitable type of lamp would be the 1000 lumen lamp, as it requires the least number of lamps to produce the required illumination. A suitable scheme could involve mounting 14 of these lamps evenly spaced throughout the hall, at a mounting height of around 4-5 meters. The space-height ratio of the lamps would be around 1:1, meaning that the distance between each lamp would be roughly equal to the mounting height.

Explanation:

Related Questions

Another Logic question, would really appreciate if someone can help!

Answers

The Bill will be certainly rejected.

What is a Bill?

The Indian Parliament enacts legislation through the use of governmental acts. These acts are only incorporated into the Indian Constitution after the draught bills are approved by parliament. To enact a law, various types of bills are introduced in either house of Parliament.Ordinary Bill (Article 107, Article 108)Concerned with any matter other than financial subjects.Money Bill (Article 110)Concerned with financial matters like taxation, public expenditure, etc.Financial Bill (Article 117 [1], Article 117[3])Concerned with financial matters (but are different from money bills).Constitutional Amendment Bill (Article 368)Concerned with the amendment of the provisions of the Constitution.Unlike Ordinary Bills, Money Bills must be introduced in Lok Sabha on the recommendation of the President.A government bill is one that is introduced in the Lok Sabha on the President's recommendation.After the bill is passed by the Lok Sabha, it is sent to the Rajya Sabha, which has only limited powers. It has no authority to reject or amend the bill.Rajya Sabha must return the bill within 14 days, with or without amendment recommendations.If it does not return the bill within the specified time frame, it is deemed to have been passed.The amendments may or may not be accepted by the Lok Sabha.

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as a young Catholic student how can you you live the four essential marks of the church in your class,school,or family​

Answers

Answer:

1. Unity: To live the essential mark of unity, you can strive to be a peacemaker in your school and family, and avoid gossip or negative talk about others. You can also seek to build bridges between different groups at school and in your family, and celebrate each other’s unique gifts and talents.

2. Holiness: To live out the essential mark of holiness, you can set aside time each day to pray and be in conversation with God. You can also practice good stewardship of your time and money, and strive to live a life of integrity and virtue.

3. Catholicity: To live out the essential mark of catholicity, you can learn about and celebrate the diversity of cultures and beliefs that make up the Church. You can also attend Mass or other liturgies in different languages and traditions, and invite others to join you in worship.

4. Apostolicity: To live out the essential mark of apostolicity, you can share the Good News of Jesus Christ with others by living out your faith in practical ways. You can also get involved in service projects in your school or community, and look for opportunities to share your faith with your family and friends.

1. According to Figure 1, the mass of cheese remaining at
4 hr was closest to which of the following values?
A. 140 mg
B. 176 mg
C. 185 mg
D. 190 mg
ARCA

Answers

Answer:

C. 185 mg

Explanation:

Therefore, we can assume that the mass of cheese remaining at 4 hours is closest to 185 mg, which is the correct answer.

22. The process of achieving employment success can be broken down into these 3 areas:
a. searching, finding and keeping a job
b. choosing, getting and keeping a job
c. trying, finding and losing a job
d. seeking, getting then losing a job

Answers

Answer:

22. The process of achieving employment success can be broken down into these 3 areas:

a. searching, finding and keeping a job

b. choosing, getting and keeping a job

c. trying, finding and losing a job

d. seeking, getting then losing a job

Explanation:
b. choosing, getting and keeping a job

Which of the following is tested on the writing and language section of the
PSAT?
OA. Essay writing
B. Recognition of incorrect metrical form
OC. Recognition of errors in usage and structure
OD. Poetry analysis
SUBMIT

Answers

The recognition of errors in usage and structure can be tested on the language and writing section of the PSAT

What is PSAT

The PSAT/NMSQT® (National Merit Scholarship Qualifying Test), also known as the Preliminary SAT, is a practise version of the SAT exam. The PSAT can only be taken once per year, and many students take it in both 10th and 11th grade. If you score well on the PSAT in your junior year, you may be eligible for a National Merit Scholarship—$180 million in merit scholarships are awarded to students each year. The PSAT lasts 2 hours and 45 minutes and assesses your reading, writing, and math skills. Unlike the SAT, the highest possible PSAT score is 1520.

HOW LONG DOES THE PSAT LAST?

The PSAT is frequently administered during the school day in lieu of other classes. The test itself lasts approximately 3 hours, including breaks.

WHAT ARE THE SECTIONS OF THE PSAT?

A composite score, two section scores, and a variety of subsection scores will be assigned to you. The exam consists of four timed sections: Evidence-Based Reading, Writing and Language, Math (no calculator), and Math (calculator allowed).

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