Name: 
 

2003 National Agricultural Mechanics Test



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

 1. 

When a tractor tire is correctly filled with liquid ballast, what percentage of the total space should be ballast?
a.
10 percent
b.
25 percent
c.
75 percent
d.
100 percent
 

 2. 

If the oil in a tractor’s hydraulic system is foaming, what is most likely the problem?
a.
The hydraulic oil is dirty
b.
The hydraulic pump is not pumping
c.
There is 50% water in the hydraulic oil
d.
There is insufficient hydraulic oil in the reservoir
 

 3. 

Which of the following factors directly influences the field capacity of agricultural equipment?
a.
Power takeoff(PTO) speed and temperature
b.
Machine weight and ground clearance
c.
Travel speed and operating efficiency
d.
Machine height and length
 

 4. 

Which of the following variables directly influences power output of a tractor’s power takeoff(PTO)?
a.
PTO torque and rotational speed
b.
Tractor travel speed and direction
c.
Tractor wheel diameter and travel speed
d.
PTO diameter and tractor engine oil pressure
 

 5. 

Which of the following are all common type of manure spreaders?
a.
Flail, bucket, and box
c.
Bucket, box, and V-tank
b.
Box, V-tank, and flail
d.
V-tank, flail, and bucket
 

 6. 

What is the appropriate method to free the flails on a flail type manure spreader when they become clogged or jammed in position so they will not rotate?
a.
Use a pry bar
b.
Use a large sledge hammer
c.
Repeatedly engage the power supply
d.
Heat them with an oxy-acetylene torch
 

 7. 

while parked on a flat surface, if the loaded bucket on a tractor is raised overhead, what is the effect on the tractor’s overall center of gravity?
a.
Center of gravity moves lower
c.
Center of gravity moves to the left
b.
Center of gravity moves higher
d.
Center of gravity moves to the right
 

 8. 

When operating a tractor on a road or highway, which of the following is correct regarding brakes?
a.
Lock the left and right brake pedals together so that both the left and right brakes assist while breaking
b.
Make sure the left and right brake pedals are not locked together so the brakes can assist with steering
c.
Use the left brake for low speed braking and the right brake for high speed braking
d.
Do not use the brakes to control speed when traveling on roads or highways
 

 9. 

What safety criteria should be followed when a person must reach into the cab of a skid steer loader?
a.
The engine should be running and the operator’s seat empty
b.
The parking brake should be set and the bucket should be raised
c.
The bucket should be lowered to the ground and the engine turned off
d.
The transmission should be in neutral and the bucket should be at mid-height
 

 10. 

Which of the following is the correct procedure when the forward visibility of a tractor operator is obstructed while transporting a large round bale with a front-end loader attachment?
a.
Move the bucket to the highest position and drive quickly to the destination
b.
Stand up and hold on to the steering wheel while leaning out of the cab to see
c.
Position the bale close to the ground and back the tractor for improved visibility
d.
Have another worker ride on top of the bale and give the driver verbal instructions
 

 11. 

Which of the following gasses is a common suffocation hazard that may exist in a grain storage bin?
a.
Carbon dioxide(CO2) given off by spoiling grain
b.
Nitrogen dioxide(NO2) given off by the drying process
c.
Hydrogen sulfide(HSO4) given off by grain respiration
d.
Nitrogen tetroxide(N2O4) given off through the aeration process
 

 12. 

When moving a tractor up a steep incline, which of the following techniques is recommended?
a.
Back up the incline
b.
Steer straight up the incline while driving upward
c.
Angle about 45 degree along the slope while driving up the incline
d.
Have someone stand on the front of the tractor while driving up the slope
 

 13. 

Why do most tractor manufacturers suggest refueling at the end of the workday?
a.
To prevent moisture accumulation in the fuel tank overnight
b.
To reduce the chance of combustion common with daytime refueling
c.
Because in the morning, a cold tractor engine starts more easily with a full tank
d.
Because fuel is less dense in the evening and the tractor’s tank will hold more fuel
 

 14. 

What should be done to increase the amount of wheel slippage when a heavily ballasted tractor has little or no slippage?
a.
Drive at a slower speed
c.
Remove ballast from the tractor
b.
Add ballast to the tractor
d.
Operate the tractor in a lower gear
 

 15. 

If at ATV with an attached boom sprayer travels 200 feet in 26 seconds, what is the travel speed in miles per hour (mph)?
a.
1.22 mph
b.
3.89 mph
c.
5.24 mph
d.
13.63 mph
 

 16. 

The torque specifications for a bolt is 4 foot-pounds. If a torque wrench calibrated in inch-pounds is used, how many inch-pounds are required to equal 4 foot-pounds?
a.
3 inch-pounds
c.
36 inch-pounds
b.
12 inch-pounds
d.
48 inch-pounds
 

 17. 

A portable auger is powered by an electric motor that rotates at 1725 revolutions per minute. If the motor has a found-inch diameter pulley and the auger is to turn at approximately 495 revolutions per minute, what diameter pulley is required for the auger?
Note: (Diameter of Pulley 1) x (Speed of Pulley 1) =  (Diameter of Pulley 2) x (Speed of Pulley 2)
a.
2 inches
b.
7 inches
c.
10 inches
d.
14 inches
 

 18. 

A combine travels at five miles per hour and has a grain head that is 28 feet wide. If grain is harvested at a rate of 48 bushels of grain per acre, what is the rate of harvest in bushels per minute?
Note: 1 hour = 60 minutes    1 mile = 5,280 feet    1 acre = 43,560 ft2
a.
6.8 bushels per minute
c.
162.9 bushels per minute
b.
13.6 bushels per minute
d.
814.5 bushels per minute
 

 19. 

If a tractor’s power takeoff (PTO) produces 105 horsepower at 540 revolutions per minute (rpm), what is the approximate torque produced?
Note:  torque in foot-pounds = PTO horsepower x 5252/ rpm
a.
105 foot-pounds
c.
1,020 foot-pounds
b.
540 foot-pounds
d.
27,100 foot-pounds
 

 20. 

A loader has two hydraulic cylinders that are each 36 inches in length with 2-inch diameter cylinders. If the loader’s hydraulic system produces a pressure of 2,500 pounds per square inch, what is the approximate force that each cylinder produces?
Note:  force = pressure x cross sectional area
Note:  area of circle = (pi) x [(diameter)2 / 4]
a.
3,900 lbs
b.
7,900 lbs
c.
15,700 lbs
d.
90,000 lbs
 

 21. 

In preparation for highway transport of a combine, what advantage is there to emptying the grain tank?
a.
The operator will move the unloading auger to the unloading position
b.
The combine will operate at a maximum highway speed of 20 mph
c.
The combine’s center of gravity is moved high above the rear axle
d.
The combine’s center of gravity is lowered
 

 22. 

As an export commodity, how is corn normally classified?
a.
An oilseed crop
c.
A food grain
b.
A feed grain
d.
A fiber crop
 

 23. 

Which of the following dairy products accounted for the largest number of pounds of export from the US?
a.
Fluid milk and cream
c.
Cheese and curd
b.
Non-fat dry milk
d.
Ice cream
 

 24. 

When a licensed milk hauler checks the temperature of the milk in the bulk tank of a dairy, what temperature is required by regulations?
a.
Below 18ªF, ideally between 0ªF and 12ªF
b.
Below 32ªF, ideally between 16ªF and 30ªF
c.
Below 40ªF, ideally between 34ªF and 36ªF
d.
Below 54ªF, ideally between 45ªF and 50ªF
 

 25. 

While refueling a farm tractor, what is the best way to prevent a situation where static electricity might ignite the fuel?
a.
Refuel the tractor in the shade away from tall buildings
b.
Operate only propane tractors that are less likely to produce a static charge
c.
Ground the tractor with an electrical conductor or by lowering mounted equipment to the ground
d.
Have the operator refuel the tractor while standing on the ground and resting a hand on the fuel tank
 

 26. 

When an engine is operated in an enclosed shed, what exhaust gas presents a hazard to people and animals?
a.
Hydrogen Peroxide
c.
Hydrogen Sulfide
b.
Carbon Monoxide
d.
Carbon Dioxide
 

 27. 

Which of the following describes the level of production where businesses will break-even?
a.
Neither a loss or a profit occurs
b.
Total assets equal total liabilities
c.
Average fixed costs equal average total costs
d.
Gross sales revenue equal the marginal input costs
 

 28. 

Which of the following is an example of a variable cost for a milk hauler that is hiring full time workers?
a.
Overtime pay for hired labor
b.
School tax on the firm’s property
c.
Casualty insurance on transport trailers
d.
Depreciation on a new semi-truck with tanker
 

 29. 

What is the mandatory method of calculating tangible depreciable property for income tax purposes?
a.
Straight Line (SL)
b.
Sum of the Years Digits (SOYD)
c.
Double Declining Balance (DDB)
d.
Modified Accelerated Cost Recovery System (MACRS)
 

 30. 

When a tractor is equipped with a rollover protective structure (ROPS) and a seat belt, what is the purpose of the ROPS?
a.
Lower the tractor’s center of gravity
b.
Prevent head injuries caused by falling objects
c.
Limit most rollovers to 90 degrees and when the seatbelt is worn, to protect the operator
d.
Limit most rollovers to 180 degrees and when the seatbelt is not worn, to protect the operator
 

 31. 

Which of the following are all fixed costs associated with operating a farm?
a.
Soil conservation losses, lost crop repayments, death benefits, and federal incentive payments
b.
The opportunity and entertainment costs not declared on Schedule F of the IRS 1040 Form
c.
Shelter, interest, taxes, depreciation, and insurance
d.
Livestock depreciation and all operating costs
 

 32. 

If a 6-inch diameter auger, operating at 425 revolutions per minute, loads 47,500 pounds of corn in 1 hour and 15 minutes, what is the capacity of the auger in bushels per hour?
Note:  1 bushel of corn = 56 pounds  1 hour = 60 minutes
a.
111.76 bu/hr
c.
848.21 bu/hr
b.
678.57 bu/hr
d.
1,360.42 bu/hr
 

 33. 

If it requires 25 seconds for a pesticide spray boom to travel 135 feet, what is the travel speed of the boom in miles per hour?
Note:  1 mile = 5,280 feet   1 hour = 3600 seconds
a.
3.68 mph
c.
7.12 mph
b.
5.94 mph
d.
9.20 mph
 

 34. 

What is the effective field capacity of a combine (in acres per hour) with a 30-foot header, traveling at 4.25 miles per hour, and operating with a field efficiency of 78 percent?
Note:  effective field capacity = width of implement in feet x speed in miles per hour x efficiency divided by 8.25
a.
10.82 ac/hr
c.
108.20 ac/hr
b.
12.05 ac/hr
d.
1205.45 ac/hr
 

 35. 

The average annual fixed costs of operating is a grinder-mixer is $16,000 and the operating costs are 8.5 cents per 100 pounds of feed processed. If the custom rate for grinding-mixing is 26 cents per 100 pounds, how much feed must be processed with the grinder-mixer annually to break even on the investment?
Note: 1 cwt=100 pounds
Note: break even quantity in cwt=       average annual fixed cost 
                                            custom rate per 100 ponds-operating cost per 100 pounds
a.
914.3 cwt
c.
91428.6 cwt
b.
9142.9 cwt
d.
914285.7 cwt
 

 36. 

If a storage elevator charges 3.5 cents per bushel per month to store corn, what is the total cost to store 26,000 bushels of corn for four months?
a.
$ 910
b.
$ 3,640
c.
$ 36,400
d.
$ 364,000
 

 37. 

If the local sales tax is 5.75%, what is the total cost, including sales tax, for an item marked $78.45?
a.
$ 78.45
b.
$ 80.22
c.
$ 82.96
d.
$ 123.55
 

 38. 

If a railcar has an inside width of 96 inches, an inside length of 47 feet, and is filled with corn to a uniform depth of 84 inches, how many bushels of grain are in the railcar?
Note: 1 foot=12 inches   1 cubic foot= 1728 cubic inches  1 bushel=1.25 cubic feet
a.
210560 bu
b.
2632.5 bu
c.
2105.6 bu
d.
210.6 bu
 

 39. 

If it cost 12.5 cents per 100 pounds to haul milk, what is the total hauling charge to transport 6375 gallons of milk?
Note: milk weighs 8.6 pounds per gallon
a.
$ 1305.36
b.
$741.27
c.
$ 548.25
d.
$ 68.53
 

 40. 

Electrical controls designed for use with electric motors must include what ratings?
a.
Wattage, amperage, and horsepower
c.
Lumens, amperage, and current
b.
Wattage, foot candles, and current
d.
Wattage, lumens, and voltage
 

 41. 

When an electrical wiring system provides power to a 230-volt motor, why is the frame of the motor grounded?
a.
to complete the branch circuit
b.
to prevent the motors from turning in reverse
c.
to physically connect the motor to equipment frames
d.
to ground the motor and reduce the likelihood of electrical shock
 

 42. 

The grounded conductor is an electrical wiring system serves what purpose?
a.
It is the neutral conductor for the electrical system
b.
It is a noncurrent carrying conductor for most appliances
c.
It is the unnecessary connection of an electrical conductor to earth
d.
It is the only possible electrical connection between the electrical system and the earth
 

 43. 

Which of the following is the correct conductor to install in the walls of a wood framed building?
a.
Tripex cable
b.
USE cable
c.
NM cable
d.
UF cable
 

 44. 

When overload protection is selected for installation inside a motor or motor controller, it should be sized for what part of the circuit?
a.
The amperage of the conductors used in the specific motor circuit
b.
The amperage of the service entrance conductors
c.
The safe operating amperage of the motor
d.
The amperage of the circuit protection
 

 45. 

When using a 12-2 WG nonmetallic sheathed cable in an 120-volt electrical lighting circuit, which conductor should a single pole, single throw light switch control (make or break the connection)?
a.
Black-hot-ungrounded
c.
White-grounded
b.
Green-grounded
d.
Bare-grounded
 

 46. 

What is the designation of the switch that will control 240-volt, single phase lighting loads that are to be turned on or off from a single location?
a.
single-pole, double-throw
c.
double-pole, double-throw
b.
double-pole, single-throw
d.
triple-pole, single-throw
 

 47. 

On a three-way switch, without a grounding terminal, which of the following correctly identifies the three terminals on the switch?
a.
One common terminal, one neutral terminal, and one grounding terminal
b.
One traveler terminal, one common terminal, and one neutral terminal
c.
Two traveler terminals and one common terminal
d.
Two common terminals and one traveler terminal
 

 48. 

If a light is to be controlled by two locations, what switches are needed?
a.
One single pole, single throw switch and one 3-way switch
b.
Two single pole, single throw switches
c.
One 3-way and one 4-way switch
d.
Two 3-way switches
 

 49. 

If a light is to be controlled from three locations, what switches are needed?
a.
Two single pole, single throw switches and two 3-way switches
b.
One 3-way switch and three 4--way switches
c.
Two 3-way switches and two 4-way switches
d.
Three 3-way switches and two 3-way switches
 

 50. 

If a light it to be controlled from four locations, what switches are needed?
a.
Two single pole, single throw switches and two 3-way switches
b.
One 3-way switch and three 4-way switches
c.
Two 3-way switches and two 4-way switches
d.
Three 3-way switches and one 4-way switch
 

 51. 

Electrical resistance is measured in what units?
a.
Ohms
b.
Volts
c.
Amperes
d.
Horsepower
 

 52. 

What is the electrical device that measures and registers the amount of power used by the consumer?
a.
Voltmeter
c.
Tachometer
b.
Ohmmeter
d.
Kilowatt hour  meter
 

 53. 

The UL abbreviation on electrical equipment is the acronym for what designation?
a.
Usage limited
c.
Underground lights
b.
Unlimited length
d.
Underwriter’s Laboratory
 

 54. 

What is the purpose of the ground fault circuit interrupter (GFCI)?
a.
Provide protection from electrical shock
b.
Signal the probability of an earthquake
c.
Render an appliance inoperable
d.
Measure stray voltage
 

 55. 

IF an 120-volt incandescent lighting load has 80 ohms of resistance, what amperage is the lighting system using? Note: voltage= amperage x ohms
a.
.2 ohms
b.
.7 ohms
c.
1.5 ohms
d.
15.0 ohms
 

 56. 

If an 120-volt incandescent lighting load uses 25 amps, what is the resistance (ohms) of the lighting system? Note: voltage= amperage x ohms
a.
.2 ohms
b.
4.8 ohms
c.
48.0 ohms
d.
120.0 ohms
 

 57. 

If an incandescent lighting system uses 4 amps and has 60 ohms of resistance, what voltage is required to operate the system properly? Note: voltage= amperage x ohms
a.
60 volts
b.
120 volts
c.
240 volts
d.
480 volts
 

 58. 

If an incandescent lighting system operates at 120 volts and uses 12 amps of current, what power (watts) will the system require? Note: Wattage= voltage x amperage
a.
10 Watts
b.
120 Watts
c.
1440 Watts
d.
2880 Watts
 

 59. 

If an incandescent lighting system uses 6000 Watts of power and operates at 150 amps, what is the resistance (ohms) of the system? Note: Wattage= voltage x amperage
a.
.03 ohms
b.
.25 ohms
c.
40.00 ohms
d.
120.00 ohms
 

 60. 

What nominal measurement is generally used to identify the size of plumbing pipe?
a.
O.D. (outside diameter)
c.
Circumference
b.
I.D. (inside diameter)
d.
Length
 

 61. 

Which pipe measurement allows all standard threaded steel pipe, regardless of the pipe’s classification or schedule, to fit standard pipe fittings?
a.
O.D. (outside diameter)
c.
Wall thickness
b.
I.D. (inside diameter)
d.
Length
 

 62. 

Copper tubing may be joined by flaring, compression, or soldering. What is then name commonly given to the soldering process when used on copper plumbing pipe?
a.
Welding
b.
Brazing
c.
Sweating
d.
Threading
 

 63. 

Copper tubing is color coded and lettered as to type, the name or trademark of the manufacturer, and the country of origin. Which of the following is a type of copper tubing with its color designation?
a.
K-green
b.
ABS-blue
c.
CPVC-tan
d.
PVC-white
 

 64. 

Which of the following is a pipe joining process that uses flux?
a.
Flaring
b.
Threading
c.
Soldering
d.
Compression
 

 65. 

PVC is the abbreviation for what type of plastic pipe?
a.
Polyvinyl chlorine
c.
Polyvinyl chloride
b.
Polyvinyl chlorate
d.
Polybutylene
 

 66. 

Which of the following plastic pipes is commonly installed for sanitary drainage and for vent piping?
a.
Chlorinated polyvinyl chloride (CPVC)
c.
Polybutylene (PE)
b.
Acrylonitrile butadiene styrene (ABS)
d.
Type K
 

 67. 

When is it necessary to angle or change the direction of plumbing pipes, which of the following fittings should be used?
a.
Union
b.
Elbow
c.
Bushing
d.
Coupling
 

 68. 

Which of the following elbow angles causes less friction in the line and is preferred for drain-waste-vent (dwv) systems because it reduces the likelihood of line clogging?
a.
45 degrees
b.
75 degrees
c.
90 degrees
d.
180 degrees
 

 69. 

Which plumbing fitting resembles a short piece of pipe with external threads on each end?
a.
Joint
b.
Nipple
c.
Coupling
d.
Street Elbow
 

 70. 

Which plumbing fitting is used to connect a branch pipeline to a main pipeline at a 90 degree angle?
a.
Tee
b.
Wye
c.
Union
d.
Coupling
 

 71. 

Which plumbing fitting is used to connect a branch line to the main line at a 45 degree angle?
a.
Tee
b.
Wye
c.
Union
d.
Coupling
 

 72. 

Which plumbing fitting is used to join two pieces of pipe?
a.
Cap
b.
Plug
c.
Bushing
d.
Coupling
 

 73. 

Which plumbing fitting is used to reduce the size of an internal opening in another fitting so a smaller size pipe may be connected?
a.
Street elbow
b.
Bushing
c.
Union
d.
Tee
 

 74. 

Plumbing pipes are frequently buried in the ground 4 feet deep or deeper. When digging a trench to this depth the trench walls should be shored or fortified to protect from what danger?
a.
Pipe corrosion
c.
Trench wall cave in
b.
Soil contamination
d.
Excess pipe pressures
 

 75. 

A pipe with water flowing through it at a rate of 20 gallons per minute has an average vertical head loss of 22.8 feet per 100 feet or horizontal run. What is the head (pressure) loss in 30 horizontal feet of this pipe?
a.
.68 feet of head loss
c.
76.00 feet of head loss
b.
6.84 feet of head loss
d.
684.00 feet of head loss
 

 76. 

Water flows at a rate of 5 gallons per minute horizontally through 50 feet of a 3/4” inside diameter pipeline having three 90 degree elbows. The pressure loss through the pipe is 5.7 vertical feet of loss per 100 feet of horizontal run. The pressure loss through each elbow is equivalent to that of 2 additional horizontal feet in pipe length. What is the total head (pressure) loss for the 50 foot horizontal pipeline with three 90 degree elbows?
a.
2.850 feet of total head loss
c.
91.920 feet of total head loss
b.
3.192 feet of total head loss
d.
319.200 feet of total head loss
 

 77. 

If a pipe has a friction loss of 275 gallons per hour, what is the equivalent loss in gallons per minute? (gpm)
Note: 1 hour = 60 minutes
a.
2.75 gpm
b.
4.58 gpm
c.
16.55 gpm
d.
27.87 gpm
 

 78. 

Head (pressure) losses in plumbing pipe are measured in both vertical feet of head loss and pounds per square inch (psi). The mathematical conversion from feet of head loss to psi is 2.31 vertical feet of head= 1 psi. If a pipe has 82 feet of vertical head loss, what is the equivalent pressure loss in psi?
a.
.03 psi
b.
35.50 psi
c.
189.42 psi
d.
820.20 psi
 

 79. 

If the outside circumference of a pipe is 2.639 inches, which of the following is the minimum sized drill bit that can be used to bore a hole that will allow the pipe to pass through the opening?
Note: Circumference of a circle= Pie x diameter
a.
.500” diameter drill bit
c.
.750” diameter drill bit
b.
.625” diameter drill bit
d.
.875” diameter drill bit
 

 80. 

What are the potential pollutants of concern from animal waste?
a.
Vitamins, homogenized by products, milk solids, and stomach acids
b.
Nutrients, pathogens, organic matter, and solids
c.
Nutrients, vitamin, and minerals
d.
Three fecal coliform bacteria
 

 81. 

Historically the USDA and  USEPA recognize which of the following options as the best method of utilizing animal manures?
a.
Dumping manure in a landfill
c.
Burning manure for fuel
b.
Applying manure to farmland
d.
Composting
 

 82. 

Which of the following correctly identifies what each letter stands for in the acronym CAFO?
a.
Concentrated animal feeding operation
c.
Confined and field operations
b.
Confined animal feeder operation
d.
Cows and feeding operations
 

 83. 

How are AFOs defined?
a.
Farms and ranches with animals grazing on open range
b.
Farms and ranches where animals are confined and given feed
c.
Farms and ranches that utilize fences to control grazing and movement of cattle
d.
Farms and ranches where animals are confined to two hours each day and are given supplemental feed
 

 84. 

Which nutrient associated with animal waste pollution can move into groundwater and cause Blue Baby Syndrome in infants?
a.
Nitrate
c.
Phosphorous
b.
Ammonia
d.
Micronutrients
 

 85. 

Which nutrient associated with animal waste pollution can move into groundwater and cause Blue Baby Syndrome in infants?
a.
Nitrate
c.
Phosphorous
b.
Ammonia
d.
Micronutrients
 

 86. 

Which of the following phrases correctly describes manure when it is properly stored and used?
a.
A major environmental liability
c.
An economic disadvantage
b.
A major environmental hazard
d.
A valuable resource
 

 87. 

Which of the following is an example of non-point source pollution?
a.
Pollution from a variety of small sources
b.
A single large pollution source within a watershed area
c.
Pollution from a large dairy operation adjacent to a subdivision
d.
The discharge from a municipality or a factory that treats its waste
 

 88. 

On the average, how much manure will one, 1000 pound steer produce?
a.
One cubic foot of manure per hour
c.
One cubic foot of manure per week
b.
One cubic foot of manure per day
d.
One cubic foot of manure per month
 

 89. 

Which of the following describes the correct outcome of composting manure?
a.
Increase the number of disease-causing organisms in the waste
b.
Reduce in the size of the manure pile
c.
Increase nitrogen in the waste
d.
Reduces heavy metals
 

 90. 

What are two of the many natural earth grading and shaping techniques that can reduce erosion and help to blend landforms in the landscape?
a.
Slope rounding and slope reduction
c.
Tidal waves and hurricanes
b.
Earthquake and volcanic eruption
d.
Screening and covering
 

 91. 

In what way can vegetation alter microclimate and regulate temperature?
a.
Changing wind directions
c.
Reducing or increasing wind velocity
b.
Reducing and increasing rainfall
d.
Eliminating all environmental variables
 

 92. 

Orienting the long axis of the building in a northeast-southeast direction and using small overhangs on a roof, would tend to affect a building in what way?
a.
Increase the natural heat in a building
b.
Decrease the natural heat in a building
c.
Increase the natural ventilation in a building
d.
Decrease the natural ventilation in a building
 

 93. 

If wheat has an average weight of 56 pounds per bushel and there are 0.453 kilograms in one pound, how many kilograms are there in 50 bushels of wheat? Note 16 ounces = one pound
a.
22.7 kilograms
c.
1,268.4 kilograms
b.
25.4 kilograms
d.
1,840.7 kilograms
 

 94. 

If a dairy grazing field is irrigated at a rate of 1.25 inches of water per hour, how many hours are needed to irrigate the field to the equivalent of one acre-foot of water?
Note: One acre-foot of water is equivalent to an acre of water, one foot deep.
a.
0.1 hour
b.
2.4 hours
c.
4.8 hours
d.
9.6 hours
 

 95. 

If a field has an area of 1.6 hectares, what is the equivalent size in square feet?
Note: 1 hectare = 10,000 square meters     1 foot = 0.3048
a.
52,493.4 square feet
c.
224,934.4 square feet
b.
172,222.6 square feet
d.
528,000.0 square feet
 

 96. 

If a field has an area of 230 acres, what is the equivalent size in hectares?
Note:   1 acre = 43,560 square feet   1 hectare = 10,000 square meters  1 foot = 0.3048
a.
93.1 hectares
c.
1,014.9 hectares
b.
931.1 hectares
d.
10,149.4 hectares
 

 97. 

A round storage bin is 12 feet in diameter and filled to a depth of 10 feet. If grain weighs 50 pounds per cubic foot, how many pounds of corn are in the bin?
Note:  Volume of Cylinder = height x pie x [( diameter)2)4]
a.
56,548.7 pounds
c.
5,654,866.8 pounds
b.
565,486.6 pounds
d.
8,261,946.5 pounds
 



 
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