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Test: Population Forecasting - Civil Engineering (CE) MCQ


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10 Questions MCQ Test Environmental Engineering - Test: Population Forecasting

Test: Population Forecasting for Civil Engineering (CE) 2024 is part of Environmental Engineering preparation. The Test: Population Forecasting questions and answers have been prepared according to the Civil Engineering (CE) exam syllabus.The Test: Population Forecasting MCQs are made for Civil Engineering (CE) 2024 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for Test: Population Forecasting below.
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Test: Population Forecasting - Question 1

 In which method of population forecasting, increase in population from decade to decade is assumed constant?

Detailed Solution for Test: Population Forecasting - Question 1

Explanation: In the arithmetic increase method, Dp/dt = K where Dp/dt = rate of change of population and K is a constant. So, the increase in the population from decade to decade is assumed constant.

Test: Population Forecasting - Question 2

What is the expression used for population forecasting by the arithmetical increase method?

Detailed Solution for Test: Population Forecasting - Question 2

Explanation: The expression of the arithmetical increase method is given by PO+n*x, where PO is the present population, x is the average of the population increase in known decade and n is the number of decades.

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Test: Population Forecasting - Question 3

In which method of population forecast, percentage increase in population from decade to decade is assumed constant?

Detailed Solution for Test: Population Forecasting - Question 3

Explanation: In the geometrical increase method, percentage increase in population from decade to decade is assumed constant. Percentage increase in population is found from a population of 3 or 4 decades and then its average is found.

Test: Population Forecasting - Question 4

What is the expression used for population forecasting by the geometrical increase method?

Detailed Solution for Test: Population Forecasting - Question 4

Explanation: The expression of geometrical increase method is given by PO (1 + R/100) n
where PO is the present population, R is the average percentage growth rate per decade and n is the number of decades.

Test: Population Forecasting - Question 5

Which method of population forecast combines both arithmetical increase and geometrical increase method?

Detailed Solution for Test: Population Forecasting - Question 5

Explanation: In the incremental increase method, the population for the next decade is found by adding to the present population, the average increase plus the average incremental increase per decade, hence combines both arithmetical and geometrical methods.

Test: Population Forecasting - Question 6

What is the expression used for population forecasting by the incremental increase method?

Detailed Solution for Test: Population Forecasting - Question 6

Explanation: The expression of the incremental increase method is given by PO + n*x + (n (n+1) /2) *y where PO is the present population, x is the average of the population increase in known decade, y is the average of incremental increase and n is the number of decades.

Test: Population Forecasting - Question 7

Logistic method is also called as _______

Detailed Solution for Test: Population Forecasting - Question 7

Explanation: Logistic method is also called a decreased rate of growth method. In this method, the percentage increase in growth rate and then the percentage decrease in growth rate are founded where all populations grow according to the logistic curve.

Test: Population Forecasting - Question 8

Consider the following statements
1. The arithmetical increase method is suitable for new cities
2. The decreasing growth rate method is used where the rate of growth shows a downward pattern
3. The geometrical increase method is used for older cities
Which of the following above statements is/are correct?

Detailed Solution for Test: Population Forecasting - Question 8

Explanation: Arithmetical increase method is suitable for older cities, whereas a geometrical increase method is suitable for new cities.

Test: Population Forecasting - Question 9

Which method is suitable if the growth rate is decreasing and population is reaching towards saturation?

Detailed Solution for Test: Population Forecasting - Question 9

Explanation: In decreased rate of growth method, growth rate is decreasing and population is reaching towards saturation and is only valid when growth rate shows a downward pattern.

Test: Population Forecasting - Question 10

Which method of population forecast is suitable when extension is required for small duration and past record is available for long duration?

Detailed Solution for Test: Population Forecasting - Question 10

Explanation: In the graphical extension method, a curve is drawn between population and time up to the present period, then the curve is extended from present to the future decade and the population is approximately determined from the extended part of the curve.

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