The world population growth rate at a certain reference year was 3.5%. Assuming exponential growth of population, after how many years, the population of the world would have increased by a factor 16 ? (A) ~ 80 years (B) ~ 40 years (C) ~ 160 years (D) ~ 320 years

The world population growth rate at a certain reference year was 3.5%. Assuming exponential growth of population, after how many years, the population of the world would have increased by a factor 16 ? (A) ~ 80 years (B) ~ 40 years (C) ~ 160 years (D) ~ 320 years
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Answer: A
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Description : Station A uses 32 byte packets to transmit messages to Station B using a sliding window protocol. The round trip delay between A and B is 80 milliseconds and the bottleneck bandwidth on the path between A and B ... What is the optimal window size that A should use? a. 20 b. 40 c. 160 d. 320

Last Answer : b. 40

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Last Answer : (C) 240 acres

A man on tour travels first 160 km at 64 km/hr and the next 160 km at 80 km/hr. The average speed for the first 320 km of the tour is: a) 35.55 km/hr b) 36 km/hr c) 71.11 km/hr d) 71 km/hr e) 69.69km/hr

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Last Answer : c 130-160/min

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Description : The missing term in the series 2, 7, 24, 77, ?, 723 is (A) 238 (B) 432 (C) 542 (D) 320

Last Answer : Answer: A 

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Description : The formula for exponential population growth is

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Description : When does exponential growth of a population stop?

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Last Answer : Answer: D

ECE Board Exam March 1996 What is the transmission rate of a system for transmitting the output of a microcomputer to a line printer operating at a speed of 30 lines/minute? Assume that the line printer has 8 bits of data per character and prints out 80 characters/line. A. 800 bps B. 400 bps C. 320 bps D. 640 bps

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Last Answer : C. 320 bps

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Last Answer : c) 80

The pipe wall thickness is minimum for a pipe of given nominal size having schedule number (A) 160 (B) 120 (C) 80 (D) 40

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Description : Two coal trains, one southbound, the other westbound, reach an over and under crossing at the same instant and each proceed at 40 kilometers per hour on their respective courses. Approximately how far apart are the lead cars two hours later, to the nearest kilometer? w) 80 x) 113 y) 136 z) 160

Last Answer : ANSWER: X -- 113 

A radio station is broadcasting at 3750 khz (kilohertz). This station would be found in which radio band? w) 20 meter x) 40 meter y) 80 meter z) 160 meter

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Last Answer : A Let 1 males 1 hr work = x 1 female 1 hour work = y 1 girl 1 hour work = z Then 2x + 6y + 8z = 1/192 ------>1 4x + 16z = 1/160 --------->2 4x + 6y = 1/240 ------------->3 Adding 2 and ... 1/192 + 1/160 =(5+6) / 960 = 11/960 10 male and 24 girls can do work in 960/11 hrs i.e., 87 3 /11 hrs

If a colleague belongs to the minority group but quite progressive in views, the basis of maintenance of healthy relations will be the realisation of that Options: A) The throat-cut competition as you assume that he is having cultural handicaps B) High selfishness- because you fell that the person will go to any extent for his vested interests C) High jealous attitude-assuming that he is relishing all benefits due to minority groups D) The hard-work he has done to achieve the status

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Description : In certain city the Taxi charges comprise of a fixed charge and the charge of the distance travelled. A person paid Rs.156 for a journey of 16 km and another person paid Rs.204 for the journey of 24 km. The amount paid by a passenger who has travelled 30 km is (A) 236 (B) 240 (C) 248 (D) 256

Last Answer : Answer: B

The percentage share of electrical power from solar energy in the total electric power generation from all renewable energy sources sought to be achieved by Indian government by the year 2022, is (A) ~ 57.1% (B) ~ 65.5% (C) ~ 47.5% (D) ~ 75%

Description : The percentage share of electrical power from solar energy in the total electric power generation from all renewable energy sources sought to be achieved by Indian government by the year 2022, is (A) ~ 57.1% (B) ~ 65.5% (C) ~ 47.5% (D) ~ 75% 

Last Answer : Answer: A

The sound power level of a jet plane flying at a height of 1 km is 160 dB. What is the maximum sound pressure level on the ground directly below the plane assuming that the aircraft radiates sound equally in all directions? A. 59.1 dB B. 69.1 dB C. 79.1 dB D. 89.1 dB

Description : The sound power level of a jet plane flying at a height of 1 km is 160 dB. What is the maximum sound pressure level on the ground directly below the plane assuming that the aircraft radiates sound equally in all directions? A. 59.1 dB B. 69.1 dB C. 79.1 dB D. 89.1 dB

Last Answer : D. 89.1 dB

The maximum growth rate occurs in (a) stationary phase (b) senescent phase (c) lag phase (d) exponential phase

Description : The maximum growth rate occurs in (a) stationary phase (b) senescent phase (c) lag phase (d) exponential phase

Last Answer : (d) exponential phase.

During exponential growth, the growth rate isA-.number of generations per unit time B- reciprocal of generation time C- both (a) and D- none of these

Description : During exponential growth, the growth rate isA-.number of generations per unit time B- reciprocal of generation time C- both (a) and D- none of these

Last Answer : reciprocal of generation tim

If the population growth follows a logistic curve, the maximum sustainable yield: (A) is equal to half the carrying capacity. (B) is equal to the carrying capacity. (C) depends on growth rates. (D) depends on the initial population.

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Last Answer : (A) is equal to half the carrying capacity.

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Description : The linearized regression equation for an exponential data set is log Å· = 0.14x + 0.4, where x is the number of years and y is the population. What is the predicted population when x = 15 Round your answer to the nearest whole number.?

Last Answer : 316

The population of India is about 1.2 billion. Take the average consumption of energy per person per year in India as 30 Mega Joules. If this consumption is met by carbon based fuels and the rate of carbon emissions per kilojoule is l5 x I0 6 kgs, the total carbon emissions per year from India will be (A) 54 million metric tons (B) 540 million metric tons (C) 5400 million metric tons (D) 2400 million metric tons

Description : The population of India is about 1.2 billion. Take the average consumption of energy per person per year in India as 30 Mega Joules. If this consumption is met by carbon based fuels and the rate of ... tons (B) 540 million metric tons (C) 5400 million metric tons (D) 2400 million metric tons 

Last Answer : (B) 540 million metric tons

A sender uses the Stop-and-Wait ARQ protocol for reliable transmission of frames. Frames are of size 1000 bytes and the transmission rate at the sender is 80 Kbps (1Kbps = 1000 bits/second). Size of an acknowledgement is 100 bytes and the transmission rate at the receiver is 8 Kbps. The one-way propagation delay is 100 milliseconds. Assuming no frame is lost, the sender throughput is __________ bytes/second. a. 2500 b. 2000 c. 1500 d. 500

Description : A sender uses the Stop-and-Wait ARQ protocol for reliable transmission of frames. Frames are of size 1000 bytes and the transmission rate at the sender is 80 Kbps (1Kbps = 1000 bits/second). Size of ... is lost, the sender throughput is __________ bytes/second. a. 2500 b. 2000 c. 1500 d. 500

Last Answer : a. 2500

At present, a mother is 3 times older than her son. After 5 years, the sum of their ages will be 70 years. The age of the mother after 10 years will be (A) 40 (B) 55 (C) 45 (D) 60

Description : At present, a mother is 3 times older than her son. After 5 years, the sum of their ages will be 70 years. The age of the mother after 10 years will be (A) 40 (B) 55 (C) 45 (D) 60

Last Answer : 45

The mean of the ages of father and his son is 27 years. After 18 years, father will be twice as old as his son. Their present ages are (A) 42, 12 (B) 40, 14 (C) 30, 24 (D) 36, 18

Description : The mean of the ages of father and his son is 27 years. After 18 years, father will be twice as old as his son. Their present ages are (A) 42, 12 (B) 40, 14 (C) 30, 24 (D) 36, 18

Last Answer : Answer: A

A person covered a certain distance by bus at the rate of 40 kmph and walked back to the initial point at the rate of 6 kmph. The whole journey took 13 hours and 48 minutes. What distance did he walk? a) 60km b) 64 km c) 70km d) 72km e) 80 km

Description : A person covered a certain distance by bus at the rate of 40 kmph and walked back to the initial point at the rate of 6 kmph. The whole journey took 13 hours and 48 minutes. What distance did he walk? a) 60km b) 64 km c) 70km d) 72km e) 80 km

Last Answer : Let the distance be x km. then (x/40) + (x/6) = 13 + (48/60) = 69/5 Answer is: d)

Four years ago, the average of a 4 member family was 40 years. 3 years ago, a boy got married to a 23 years old girl, and they had a baby boy last year. what is the average of the family 2 years from now assuming no one joins or leaves from the family in the next 2 years.

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A two-winding single phase transformer has a voltage regulation of 4.5% at full-load and unity power-factor. At full-load and 0.80 power-factor lagging load the voltage regulation will be (A) 4.5%. (B) less than 4.5%. (C) more than 4.5%. (D) 4.5% or more than 4.5%.

Description : A two-winding single phase transformer has a voltage regulation of 4.5% at full-load and unity power-factor. At full-load and 0.80 power-factor lagging load the voltage regulation will be (A) 4.5%. (B) less than 4.5%. (C) more than 4.5%. (D) 4.5% or more than 4.5%.

Last Answer : (C) more than 4.5%.

Nine year olds are taller than seven year olds. This is an example of a reference drawn from (A) Vertical study (B) Cross-sectional study (C) Time series study (D) Experimental study

Description : Nine year olds are taller than seven year olds. This is an example of a reference drawn from (A) Vertical study (B) Cross-sectional study (C) Time series study (D) Experimental study

Last Answer : (B) Cross-sectional study

The rate constant of a chemical reaction increases by 100 times when the temperature is increased from 400 °K to 500 °K. Assuming transition state theory is valid, the value of ‘E/R’ is (A) 8987°K (B) 9210°K (C) 8764°K (D) 8621°K

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Last Answer : (B) 9210°K

What is the share of urban population in the total population of Pakistan? A. 44.8% B. 52.5% C. 40.2% D. None of these

Description : What is the share of urban population in the total population of Pakistan? A. 44.8% B. 52.5% C. 40.2% D. None of these

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What is the share of urban population in the total population of Pakistan? A. 44.8% B. 52.5% C. 40.2% D. None of these

Description : What is the share of urban population in the total population of Pakistan? A. 44.8% B. 52.5% C. 40.2% D. None of these

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What is the average level of cholesterol in an egg? a. 80 mg c. 240 mg b. 120 mg d. 320 mg

Description : What is the average level of cholesterol in an egg? a. 80 mg c. 240 mg b. 120 mg d. 320 mg

Last Answer : c. 240 mg

The turns ratio required to match an 80 ohms source to a 320 ohms load is?

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The sum of the ages of two persons A and B is 50. 5 years ago, the ratio of their ages was 5/3. The present age of A and B are (A) 30, 20 (B) 35, 15 (C) 38, 12 (D) 40, 10

Description : The sum of the ages of two persons A and B is 50. 5 years ago, the ratio of their ages was 5/3. The present age of A and B are (A) 30, 20 (B) 35, 15 (C) 38, 12 (D) 40, 10

Last Answer : Answer: A

Anil is twice as old as Sunita. Three years ago, he was three times as old as Sunita. The present age of Anil is (A) 6 years (B) 8 years (C) 12 years (D) 16 years

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Anil played 8 cricket matches. The mean (average) of the runs was found to be 80. After playing four more matches, the mean of the runs of all the matches was found to be 70. The total runs made in the last four matches is (A) 400 (B) 300 (C) 200 (D) 100

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Certain characteristic demographic features of developing countries are (a) high fertility, low or rapidly falling mortality rate, rapid population growth and a very young age distribution(b) high fertility, high density, rapidly rising mortality rate and a very young age distribution (c) high infant mortality, low fertility, uneven population growth and a very young age distribution (d) high mortality, high density, uneven population growth and a very old age distribution.

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Last Answer : (a) high fertility, low or rapidly falling mortality rate, rapid population growth and a very young age distribution