FE Exam Questions and correct
Answers
$20,000 is deposited at the end of each year into a fund earning 6% interest. At the
end of ten years, the amount accumulated is most nearly
(A) $150,000
(B) $180,000
(C) $260,000
(D) $280,000
50-5 - ------------ANS: C
$2000 will become available on January 1 in year 8. If interest is 5%, what is most
nearly the present worth of this sum on January 1 in year 1?
(A) $1330
(B) $1350
(C) $1400
(D) $1420
50-4 - ------------ANS: D
$5000 is put into an empty savings account with a nominal interest rate of 5%. No
other contributions are made to the account. With monthly compounding,
approximately how much interest will have been earned after five years?
,(A) $1250
(B) $1380
(C) $1410
(D) $1420
Engineering Economics DE - ------------ANS: D
0.5 m^3 of superheated steam at 400 kPa and 300*C is expanded behind a piston
until the temperature is 210*C. The steam expands polytropically with a polytropic
exponent of 1.3. The final volume and pressure of the steam are 0.884 m^3 and
190.7 kPa, respectively. What is most nearly the total work done during the
expansion process?
(A) 24 kJ
(B) 100 kJ
(C) 330 kJ
(D) 420 kJ - ------------ANS: B
0.5 m^3 of superheated steam has a pressure of 400 kPa and temperature of 300*C.
What is most nearly the mass of the steam?
(A) 0.040 kg
(B) 0.76 kg
(C) 42 kg
(D) 55 kg - ------------ANS: B
,100 random samples were taken from a large population. A particular numerical
characteristic of sampled items was measured. The results of the measurements
were as follows.
45 measurements between 0.859 and 0.900
0.901 was observed once
0.902 was observed three times
0.903 was observed twice
0.904 was observed four times
45 measurements between 0.905 and 0.958
The smallest value was 0.859, and the largest value was 0.958. The sum of all 100
measurements was 91.170. Except those noted, no measurements occurred more
than twice.
What are the mean, mode, and median of the measurements, respectively?
(A) 0.908; 0.902; 0.902
(B) 0.908; 0.904; 0.903
(C) 0.912; 0.902; 0.902
(D) 0.912; 0.904; 0.903 - ------------ANS: D
100 resistors produced by company A and 150 resistors produced by company B are
tested to find their limits before burning out. The test results show that the company
A resistors have a mean rating of 2 W before burning out, with a standard deviation
of 0.30 W. What are the 95% confidence limits for the difference between the two
means for the company A resistors and company B resistors (A-B)?
, (A) -1.1 W; -1.0W
(B) -1.1W; -0.93W
(C) -1.1W; 0..90W
(D) -1.0W; -0.99W
(6-16) - ------------ANS: B
15 kg/s of air are compressed from 1 atm and 300K (enthalpy of 300.19 kJ/kg) to 2
atm and 900K (enthalpy of 732.93 kJ/kg). Heat transfer is negligible. The air
compressor's power output is most nearly
(A) 5.6 MW
(B) 6.5 MW
(C) 7.6 MW
(D) 8.9 MW - ------------ANS: B
15% of a batch of mixed-color gumballs are green. Out of a random sample of 20
gumballs, what is the probability of getting two green balls?
(A) 0.12
(B) 0.17
(C) 0.23
(D) 0.46 - ------------ANS: C
1g of oxygen and 2 g of helium are mixed in a gas sampling bag. The gases are at
50*C and atmospheric pressure. What is most nearly the volume of the bag?
Answers
$20,000 is deposited at the end of each year into a fund earning 6% interest. At the
end of ten years, the amount accumulated is most nearly
(A) $150,000
(B) $180,000
(C) $260,000
(D) $280,000
50-5 - ------------ANS: C
$2000 will become available on January 1 in year 8. If interest is 5%, what is most
nearly the present worth of this sum on January 1 in year 1?
(A) $1330
(B) $1350
(C) $1400
(D) $1420
50-4 - ------------ANS: D
$5000 is put into an empty savings account with a nominal interest rate of 5%. No
other contributions are made to the account. With monthly compounding,
approximately how much interest will have been earned after five years?
,(A) $1250
(B) $1380
(C) $1410
(D) $1420
Engineering Economics DE - ------------ANS: D
0.5 m^3 of superheated steam at 400 kPa and 300*C is expanded behind a piston
until the temperature is 210*C. The steam expands polytropically with a polytropic
exponent of 1.3. The final volume and pressure of the steam are 0.884 m^3 and
190.7 kPa, respectively. What is most nearly the total work done during the
expansion process?
(A) 24 kJ
(B) 100 kJ
(C) 330 kJ
(D) 420 kJ - ------------ANS: B
0.5 m^3 of superheated steam has a pressure of 400 kPa and temperature of 300*C.
What is most nearly the mass of the steam?
(A) 0.040 kg
(B) 0.76 kg
(C) 42 kg
(D) 55 kg - ------------ANS: B
,100 random samples were taken from a large population. A particular numerical
characteristic of sampled items was measured. The results of the measurements
were as follows.
45 measurements between 0.859 and 0.900
0.901 was observed once
0.902 was observed three times
0.903 was observed twice
0.904 was observed four times
45 measurements between 0.905 and 0.958
The smallest value was 0.859, and the largest value was 0.958. The sum of all 100
measurements was 91.170. Except those noted, no measurements occurred more
than twice.
What are the mean, mode, and median of the measurements, respectively?
(A) 0.908; 0.902; 0.902
(B) 0.908; 0.904; 0.903
(C) 0.912; 0.902; 0.902
(D) 0.912; 0.904; 0.903 - ------------ANS: D
100 resistors produced by company A and 150 resistors produced by company B are
tested to find their limits before burning out. The test results show that the company
A resistors have a mean rating of 2 W before burning out, with a standard deviation
of 0.30 W. What are the 95% confidence limits for the difference between the two
means for the company A resistors and company B resistors (A-B)?
, (A) -1.1 W; -1.0W
(B) -1.1W; -0.93W
(C) -1.1W; 0..90W
(D) -1.0W; -0.99W
(6-16) - ------------ANS: B
15 kg/s of air are compressed from 1 atm and 300K (enthalpy of 300.19 kJ/kg) to 2
atm and 900K (enthalpy of 732.93 kJ/kg). Heat transfer is negligible. The air
compressor's power output is most nearly
(A) 5.6 MW
(B) 6.5 MW
(C) 7.6 MW
(D) 8.9 MW - ------------ANS: B
15% of a batch of mixed-color gumballs are green. Out of a random sample of 20
gumballs, what is the probability of getting two green balls?
(A) 0.12
(B) 0.17
(C) 0.23
(D) 0.46 - ------------ANS: C
1g of oxygen and 2 g of helium are mixed in a gas sampling bag. The gases are at
50*C and atmospheric pressure. What is most nearly the volume of the bag?
