FE Questions

-

SIMULATED

EIT

ENGINEERING ECONOMICS An automobile costs $5000.00 and has an estimated life of 5 years.

Expenditure of extra money on certain additional maintenance items will extend this life to 10 years. Interest is 12.5%

1. How much should be spent for this additional maintenance? b. $450 a. $500 d. $350 c. $400 e. $300 2. What annual payment is required in order to have the renewal cost available in 5 yrs.? b. $840 a. $960 d. $690 c. $780 e. $573 3. If the interest rate was reduced to 12% per annum, compounded monthly, what is the effective interest rate? b. 12.35% a. 12.25% d. 12.7% c. 12.5% e. none of the above 4. If expenditures such as gasoline, oil, tires, batteries, etc., amount to $2300 per year, insurance costs $1,000 per year, what is the Annual Cost for owning this car for the 5 year life if the salvage value is $1,000? a. $43,000.00 c. $4,548.60 e. $3,829.25

b. $4,147.50 d. $4,829.25

ELECTRICAL THEORY Problems 5-8 relate to the circuit shown below.

141 sin rot

V

3Q

R

L f

=

10.6 60hz

X

10- 3 h

The circuit shown is a series R-L hook with a sinusoidal input equal to V. V = 141 sin wt; R=3il;L=l0.6 x 1Q-3h :f =60Hz

EXAM

SESSION PM ftp.taobao#Egf_oae3.

-3-3-3 13-17

13-18

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5.

What is the effective steady state current? (include the relative phase angle. a. 141LQ.:_ b. 141L...i5...: c. 20/-53.11. d. 100/73.2. e. 5/53.11.

6.

Using the values of the components given compute the power factor. a. 0.7 b. 0.6 c. 0.5 d. 0.8 e. 0.78

7.

Using the values given, what is the effective value of the voltage drop across the inductor? (include its phase angle.) a. 141/89.21. b. 60/-53.1. c. 80/36.9. d. 100/73.2. e. none of these

8.

What is the power consumed by the load? a. 60 watts b. 123 watts c. 180 watts d. 319 watts e. 1200 watts

DYNAMICS Problems 9-11 relate to the following problem statement.

The motion of a particle is defined by a= 200 + 6t2 ftlsec2. It has a velocity of 2 ftlsec and a distance s = 0, at time = 0 from a fixed point.

9.

Determine the average velocity during the first 10 sec. a. 8004 fps b. 4002 fps c. 4440 fps d. 8040 fps e. 6030 fps

10.

If a second particle has a motion defined by v = 160t + 12t2, which equation expresses the length of time required for it reach the first particle? S = 0, and t = 0 for the second particle. a. (t3 - 8t2 + 40t + 4. b. t(t3 - 8t2 + 40t + 4. c. t(t4 - 8t3 + 40t2 + 4t. d. 2t(t3 - 8t2 + 40t + 4. e. 2(t3 - 8t2 + 40t + 4.

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11.

If the weight of the particle with v = 160t + 12t2 is 2 lbs, what constant force would be required to stop it if the force were applied at time t = 2.5 seconds. Assume that the stopping distance is 1 ft.

a. 500 lbs c. 7000 lbs e. 14000 lbs

b. 5000lbs d. 10,000 lbs

MECHANICS OF MATERIALS Questions 12 and 13 refer to the following problem statement: A composite beam is made of wood and steel, as shown: Assume Est! = 20XEwood

12. Determine the moment of inertia about the neutral axis. a. 1688 in4 b. 3459 in4 c. 2586 in4 d. 1248 in4 e. none of these

13. The function of the connectors in a composite unit such as this is to: a. Help balance the loads in the beam b. Transfer moment from the plates to the beam c. Transfer horizontal shear from the plate to the beam d. Transfer vertical shear from the plate to the beam e. It has something to do with diagonal tension

13-20

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STATICS Problems 14 and 15 refer to the beam shown below which carries a moving load of 1500 lbs. Assume the beam to be supported at B by a rod BC as shown. The supports at A and C and the joint at B permit unrestricted rotation.

T.25 .25

X

X

4

5l .25 X 4 Beam Cross

Section

12'

Beam Data Modulus of Elasticity E = 30 x 106 Moment of Inertia I = 20 in4 Cross Sectional Area A = 3.375 in2 Rod Data Modulus of Elasticity E = 30 x 106 Cross Sectional Area A= 0.4418 in2 14. The maximum unit flexural stress in the beam is most nearly b.6000 psi a.3000 psi d.l6000 psi c.8000 psi e. 32000 psi 15. The maximum unit tensile stress in the rod BC is most nearly. b.6000 psi a.3000 psi d.l6000 psi c.8000 psi e.32000 psi

MAlHEMATICS 16.

The sum of the circumferences of two circles is 367t. The sum of the areas of the circles is 1807t. The radius of one of the circles is: b. 9 a. 10 d. 7 c. 8 e. 6

17.

Ground salt is poured in a pile on the ground at the rate of 4 cfm. it forms a conical pile whose height is 30% of the diameter of the base.

How fast is the height of the pile increasing when the base is 5 ft. in diameter? b .. 687 fpm a . .458 fpm d. 2.83 fpm c .. 204 fpm e. 5.76 fpm

W0 RK B0 0 K

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18.

What is the general solution of the differential equation ydx- y2dy = dy? a. x = 3y2+ 2y + C b. X = y3f3 + y + C c. x =esc y + C d. x = y2/2 + In y + c e. x sin y cos y + In y + C

19.

A 3-ft long wire is cut into two pieces. One piece is used to form a square and the other piece used to form a circle. If the sum of the enclosed areas is to be a minimum, what length of the wire should be used to form the circle? a. 0.14 ft. b. 0.56 ft. c. 1.12 ft. d. 1.32 ft. e. none of the above

20.

My pencil holder contains 3 red pencils, 4 green pencils and 3 blue pencils. My secretary has a pencil holder nearby which contains 4 blue pencils, 4 red pencils and 2 green pencils. What is the probability of myreaching out and grasping a blue pencil? a. 7/l b. 12/l c. 7/10 d. 12/20 e. 7/20

Problems 21 and 22 refer to the figure below.

Line CD is Perpendicular to line AB.

c

(1,5)

y

B

(9, 1) X

A

(0,-2)

21.

What is the slope of line BD? a. -5 b.. 33333 c. -.33333 d. -3 e. 3

22

What is the area of triangle ABC? a. s("l"O b. 6{10 c. 26 d. 30 e. 60

3--3--33 13-21

13-22

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TIIERMODYNAMICS

Problems 23 and 24 refer to the following problem statement Atmospheric air inlet to an air cooler has a specific humidity of .009 lbs water vapor/lbs dry air at 80°F. Calculate the following.

23. Density of dry air a .. 0726 lb/ft3 c .. 0459 lbfft3 e .. 0858 lb/ft3

b .. 0680 lb/ft3 d .. 0472 lb/ft3

24. Enthalpy of the water vapor a. 41.5 Btu/lbs dry air b. 32.5 Btullbs dry air c. 29.0 Btu/lbs dry air d. 39.6 Btullbs dry air e. 24.8 Btu/lbs dry air

FLUID MECHANICS

Problems 25 and 26 refer to the following problem statement.

A radial gate, 5 ft wide, is installed as shown.

Sea Water w

=

16'

65.0 p

25.

Neglecting the weight of the gate and any mechanical forces, such as friction, what force Pis required to open the gate?

(Answers are rounded off.) a. 100,000 lbs c. 25,000 lbs e. 0 lbs

26.

b. 50,000 lbs d. 12,500 lbs

What force acts against the sea wall? a. 41600 lb. b. 40960 lb. d. 39936lb. c. 79872 lb. e. none of these

W0 RK B0 0 K