Name: 
 

2004 Ohio State Agricultural Engineering Technology Problem Solving Test



Multiple Choice
Identify the choice that best completes the statement or answers the question.
 

 1. 

The speedometer on Ann’s tractor is not working. She thinks she is traveling at 4 MPH. She sees two trees along a fence 176 feet apart. She drives that distance. About how fast should she cover that distance at 4 MPH?
a.
15 seconds
b.
30 seconds
c.
60 seconds
d.
90 seconds
 

 2. 

When plowing (under load), David observes that he has 20 wheel revolutions between two telephone poles. However when not under load he observes 18 wheel revolutions between the same two telephone poles. Determine the percent slippage Peter is experiencing between the two poles. The poles are 80 feet apart.

Percent of slippage is:
a.
5
b.
10
c.
15
d.
20
 

 3. 

When plowing (under load), David observes that he has 20 wheel revolutions between two telephone poles. However when not under load he observes 18 wheel revolutions between the same two telephone poles. Determine the percent slippage Peter is experiencing between the two poles. The poles are 80 feet apart. After figuring the percentage of slippage, is it acceptable?
a.
Yes
c.
depends on conditions
b.
No
d.
can’t tell
 

 4. 

You have your own welding shop. You’ve specialized in having a mobile welding service. You modified a Hum-Vee to have SMAW, GTAW, OAC/OAW and PAC processes which you can take anywhere in the field.

Currently, you are working on two jobs. One job is in the shop and the other will be done in the field.

For the shop job you are required to weld with E7024 electrodes. Here is the information for the job:

A 1/2” flat fillet weld is to be made around the base of round light poles. There are 100 poles to be welded. Each pole is 7” in diameter.

For the field job you are also required to weld with E7024 electrodes. Here is the information for this job:

A 1/2” flat fillet weld is to be made around the base of square light poles at a new shopping mall. There are 100 poles to be welded. Each pole is 5.5” in square.

You need to determine how long each job will take to weld and how many pounds of electrodes needed to do the work. Use the following to do the calculations:

Given the above information calculate the length of weld (perimeter/circumference of lamp post) needed to weld each lamp post (field job and shop job). For Pi use 22/7. Calculate to the length of each weld to the nearest inch.
a.
22” of weld for the shop job and 16.5” of weld for the field job.
b.
22” of weld for both projects.
c.
30” of weld for the shop job and 11” of weld for the field job.
d.
30” of weld for both projects.
 

 5. 

You have your own welding shop. You’ve specialized in having a mobile welding service. You modified a Hum-Vee to have SMAW, GTAW, OAC/OAW and PAC processes which you can take anywhere in the field.

Currently, you are working on two jobs. One job is in the shop and the other will be done in the field.

For the shop job you are required to weld with E7024 electrodes. Here is the information for the job:

A 1/2” flat fillet weld is to be made around the base of round light poles. There are 100 poles to be welded. Each pole is 7” in diameter.

For the field job you are also required to weld with E7024 electrodes. Here is the information for this job:

A 1/2” flat fillet weld is to be made around the base of square light poles at a new shopping mall. There are 100 poles to be welded. Each pole is 5.5” in square.

You need to determine how long each job will take to weld and how many pounds of electrodes needed to do the work. Use the following to do the calculations:

Given the above information you need to order electrodes for the job. A 1/2” flat fillet weld weight 1/2lb per foot. Electrode efficiency is about 50% for E7024 electrodes. This means that it takes 1 lb of electrodes to make a foot of 1/2” flat fillet weld. The combined length of weld for both jobs is 4400” of weld. How many 50 lb boxes of electrode will you need to buy? You can only buy whole boxes.
a.
5 boxes
b.
7 boxes
c.
8 boxes
d.
10 boxes
 

 6. 

The Allegheny and Monongahela Rivers meet at Pittsburgh to form the Ohio River. The Allegheny River, flowing south through forests, well-tended farms, and small towns, has an average flow rate of 340 cubic feet per second (cfs) and a slit load of 250 mg/L. The Monongahela River, flowing north through old steel towns and poor farm country, has a flow rate of 460 cfs and a slit load of 1500 mg/L. What is the average flow of the Ohio River?
a.
500 cfs
b.
600 cfs
c.
700 cfs
d.
800 cfs
 

 7. 

The Allegheny and Monongahela Rivers meet at Pittsburgh to form the Ohio River. The Allegheny River, flowing south through forests, well-tended farms, and small towns, has an average flow rate of 340 cubic feet per second (cfs) and a slit load of 250 mg/L. The Monongahela River, flowing north through old steel towns and poor farm country, has a flow rate of 460 cfs and a slit load of 1500 mg/L. What is the expected slit concentration in the Ohio River?
a.
890 mg/L
b.
925 mg/L
c.
969 mg/L
d.
1010 mg/L
 

 8. 

The field contains how many acres?

mc008-1.jpg
a.
More than 3 acres
c.
About 1 3/4 acres
b.
About 2 1/8 acres
d.
Less than one acre
 

 9. 

If algae contain a carbon: nitrogen: phosphorous (C:N:P) ratio of 100:16:1 by weight, and the water in which the algae grow contains 1.00 mg/L of carbon, .32 mg/L of nitrogen, and .20 mg/L of phosphorous, which element will be limiting algae growth?
a.
Nitrogen
c.
Phosphorous
b.
Carbon
d.
None of the above
 

 10. 

A given high school has a student body of 750 students. on average, each student contributes 0.25 lbs of solid waste per day, excluding the cafeteria which contributes 370 lbs daily. This trash is placed in 20 cubic yard capacity dumpsters behind the school. If the density of the solid waste placed in the dumpster is 120 lbs/ cubic yard and trash pickup occurs only once a week, how many dumpsters does the school need?
a.
One
b.
Two
c.
Three
d.
Five
 

 11. 

The heater in a pig nursery has an output of 45,000 BTU/hr. if the heater is burning propane at 80% efficiency, what is the cost per hour for the propane to operate the heater? Assume that the propane costs $1.10/gal and has an energy content of 92,000 BTU/gal.
a.
$.67/hour
b.
$.54/hour
c.
$.43/hour
d.
$.38/hour
 

 12. 

A 1500 watt heater operates 10 hours per day. What is the cost to operate the heater for one month (30 days) if electricity costs $.065/kWh?
a.
$2.92
b.
$29.25
c.
$8.98
d.
$.98
 

 13. 

Given a farmstead with the following buildings and the corresponding maximum demand loads, determine the minimum main service capacity

Residence                            92 A, 230 V
Grain Handling System      125 A. 230 V
Farm Shop                           80 A, 230 V
Hog House                         100 A, 230 V
Beef Barn                            60 A, 230 V
a.
100 A
b.
200 A
c.
500 A
d.
1000 A
 

 14. 

Given the following date for an electric motor, calculate the operating efficiency of the motor. Hint: 1 hp = 764 W

Motor Inputs - 225 V                      25 A                          4500 W
Motor Outputs - 5.0 hp                    1760 rpm
a.
66.3%
b.
95.4%
c.
76.5%
d.
82.9%
 

 15. 

What is the pressure in a 4 inch diameter cylinder that is producing 18,000 lb of force to support a load?  (F=PA)
a.
4500 psi
b.
1432 psi
c.
1125 psi
d.
358 psi
 

 16. 


mc016-1.jpg

The National Fire Prevention Association (NFPA) uses a colored-coded, numerical diamond labeling and marking system (see above) to identify hazardous materials. The ‘”red” 4 (top of the diamond) labeled above indicates a material that is:
a.
a severe health hazard
c.
a deadly flammable hazard
b.
a moderately reactive hazard
d.
a slight health hazard
 

 17. 


mc017-1.jpg
Given the above chart on fire, fire extinguisher types and symbols which type would be the best to have in a farm shop?
a.
A type extinguisher
c.
ABC type extinguisher
b.
B type extinguisher
d.
A bucket of water
 

 18. 


mc018-1.jpg

Minimal or no insulation: 12.5 watts/sq. ft.
Average amount of insulation (R-11 in walls and R-19 in ceiling): 10 watts/sq. ft.
Fully insulated (R-19 in walls and floor, R-38 in ceiling): 8 watts/sq. ft.

You are planning to purchase a heater for a fully insulated farm office. The room is 250 square feet. Given the above information and using the graph what is the recommended wattage:
a.
500
b.
1500
c.
2000
d.
2500
 

 19. 


mc019-1.jpgmc019-2.jpgmc019-3.jpgmc019-4.jpgmc019-5.jpg
Which type of pipe material would be best given exposure to acidic fluids and high UV radiation:
a.
PVC
c.
Polypropylene
b.
PVDF
d.
Teflon
 

 20. 

mc020-1.jpgmc020-2.jpgmc020-3.jpgmc020-4.jpgmc020-5.jpg
Which type of pipe material would be best for good strength, rigid and the most cost-effective:
a.
PVC
b.
PVDF
c.
Polyethylene
d.
Teflon
 

 21. 

What depth (ft) is required to store 8000 bushels of corn in a cylindrical grain bin 30 ft in diameter?
a.
11.1
b.
11.3
c.
14.1
d.
20.2
 

 22. 

A concrete curing compound is applied to fresh concrete to increase the strength of the concrete. The compound is applied at a rate of 5 gallons for every 350 square feet. The concrete to be cured measures 100 feet long by 80 feet wide and 4” thick. How many gallons of curing compound will be needed to cure the concrete?
a.
23 gallons
b.
115 gallons
c.
5 gallons
d.
1600 gallons
 

 23. 

The concrete for a feed lot is to be 5 inches thick with a 6 inch compacted sub-grade. The sub-grade material is 411 limestone that has a density of 100 pounds per cubic foot. The feed lot measures 120 feet long by 75 feet wide. How many tons of stone are required for the sub-grade?
a.
450 tons
b.
900 tons
c.
225 tons
d.
500 tons
 

 24. 

How many square yards of plastic are required to construct a temporary greenhouse covered with a single layer of plastic? The greenhouse is to be semicircular in shape; 100 feet long, 20 feet wide, and 10 feet high in the center. Include the ends.
a.
384 yd2
b.
349 yd2
c.
222 yd2
d.
356 yd2
 

 25. 

A gallon of con yellow barn paint will cover 350 square feet. How many gallons are required to paint two barns? Each barn has outside walls of a 40’ x 90’, the height from the foundation to the eaves is 12’ and the roof is a 12-12 pitch?
a.
10 gallons
b.
17 gallons
c.
24 gallons
d.
36 gallons
 



 
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