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2003 North Carolina State Agricultural Mechanics Test


MultipleChoice
Identify the letter of the choice that best completes the statement or answers thequestion.
 

 1. 
A bag of Portland Cementcontains one:
a.
Cubic foot
b.
Cubic yard
c.
Square foot
d.
Square yard
 

 2. 
The types of pipe fitting usedto connect pipes of different sizes are:
a.
Adapters andelbows
c.
Plugs and couplings
b.
Caps andunions
d.
Reducers and bushings
 

 3. 

Welded wire is used in concretefloors to:
a.
Level the floor
c.
Keep animalscomfortable
b.
Reinforce the floor
d.
Keep out mice andrats
 

 4. 

The point of a metal drill bitis used for drilling holes in mild steel cuts best when the point is sharpened to an angleof:
a.
12 degrees
b.
30 degrees
c.
59 degrees
d.
83 degrees
 

 5. 

The relationships of metalthickness to number of teeth per inch of hacksaw blades is:
a.
No relationships
b.
The thicker the metal, the fewerteeth
c.
The thicker the metal, the more teeth
d.
the thinner the metal, the longer the blade
 

 6. 

Which of these metals is thebest conductor of electricity?
a.
Aluminum
b.
Copper
c.
Lead
d.
Tin
 

 7. 

When compared to select gradesof lumber, common grades have:
a.
No knots
c.
Fewer knots
b.
Equal amount of knots
d.
More knots
 

 8. 

Which of these is a nonferrousmetal?
a.
Aluminum
b.
Cast iron
c.
Mild steel
d.
Wrought iron
 

 9. 

The term used to describe 1000watts of electricity is:
a.
Ampere
b.
Kilowatt
c.
Megawatt
d.
Volt
 

 10. 

An alloy is:
a.
Cutting oil
c.
Mixture of metals
b.
Metal in its pure state
d.
Steel before it is cooled
 

 11. 

When compared to machineryrepairs, maintenance is:
a.
About the samecost
c.
More costly
b.
Lesscostly
d.
Twice as costly
 

 12. 

The major reason for changingoil and filters in agricultural machinery is to protect the internal engine partsfrom:
a.
Dirt
b.
Fuel
c.
Old oil
d.
Water
 

 13. 

Pipe friction loss decreaseswhen water capacity decreases, when pipe length decreases, or when the:
a.
Pipe diameter decreases
c.
Water has chlorine added
b.
Pipe diameter increases
d.
Water is pure
 

 14. 

Submersible pumps are easy toinstall and efficient, but their use is limited to:
a.
Deep wells
c.
Wells at least 4” in diameter
b.
Shallow wells
d.
Wells at least 8” in diameter
 

 15. 

Target rods used with tripodlevels are graduated in:
a.
Feet, inches, and 1/16inches
c.
Feet, tenths and hundredths
b.
Feet, inches, and  1/2inches
d.
Yards, feet and inches
 

 16. 

The most important step insetting up a farm level is:
a.
Clean thelens
c.
Measure the distance to the rod
b.
Level the instrument
d.
Set tripod legs 3’ apart
 

 17. 

To improve safety and qualityof work, tools used for cutting should be:
a.
Dull
b.
New
c.
Old
d.
Sharp
 

 18. 

Compared to repairs andrenovations, the ratio of materials to labor for new construction is:
a.
About the same
b.
Higher
c.
Lower
d.
Zero
 

 19. 

The first thing that should bedone when planning construction projects is:
a.
Make a plan withdrawings
c.
Plan to purchase the materials
b.
Plan to find a contractor
d.
Start constructing the project
 

 20. 

Most large swine producers inNorth Carolina wash animal wastes into a:
a.
Ditch
b.
Fish pond
c.
Lagoon
d.
Septic tank
 

 21. 

The Land Capability Class withthe fewest limitations to its use is:
a.
I.
b.
II.
c.
VI.
d.
VIII.
 

 22. 

Before storing lawnmowers,,chain saws, tractors or other gasoline engines more than three months, the fuel tanks, lines andcarburetors should be drained to:
a.
Keep gasoline from gettingold
c.
prevent loss of gasoline
b.
Prevent gummingup
d.
Use the fuel in other machinery
 

 23. 

A major DISADVANTAGE ofcenter-pivot sprinkler irrigation is:
a.
Corners of square fields get no water
b.
Corners of square fields get too much water
c.
Operation costs are high
d.
Water-use efficiency islow
 

 24. 

The two factors that determinethe amount of water to be applied during irrigation are:
a.
Land class and slope
c.
Soil pH and fertility
b.
Rooting depth and soil texture
d.
Soil thickness andcolor
 

 25. 

Which two variables that affectsoil erosion are most controlled by the person managing the land?
a.
Cover and support practices
c.
Soil erodability andslope
b.
Slope and rainfall runoff
d.
Support practices andrainfall
 

 26. 

Buildings that have heavy steelframes connected to concrete floors are:
a.
Polebuildings
c.
Post-frame buildings
b.
Post-and-girderbuildings
d.
Rigid-frame buildings
 

 27. 

For both diesel and gasolineengines, the greatest efficiency on a heavy load is when the speed control or fuel leveris:
a.
Completely closed
c.
One-half open
b.
Completely open
d.
One-third open
 

 28. 

Most portable arc welders thatare powered by gasoline engines are:
a.
AC
b.
AC/DC
c.
DC
d.
Oxyacetylene
 

 29. 

In the safety color code,safety and first aid equipment are designated by:
a.
Green
b.
Red
c.
White
d.
Yellow
 

 30. 

Which class of fire is agasoline fire?
a.
A
b.
B
c.
C
d.
D
 

 31. 

Which device is used inagricultural buildings to control temperature?
a.
Carbon dioxidemeter
c.
Photocell
b.
Humidistat
d.
Thermostat
 

 32. 

The fuel for most chain saw andstring-type grass cutter engines is a gasoline and oil mixture of a specific ratio because theengines are:
a.
Four-cycle
b.
Four-cylinder
c.
One-cycle
d.
Two-cycle
 

 33. 

The major purpose of enginemaintenance is to keep the inside of the engine:
a.
Clean
b.
Cool
c.
Hot
d.
Oiled
 

 34. 

About two-thirds of the cost ofpainting is the:
a.
Cleaning materials
c.
Paint
b.
Labor
d.
Painting supplies
 

 35. 

What is the grade for interiorplywood with the best available grade for the face ply and lowest grade for the backlayer?
a.
A-A
b.
A-B
c.
A-D
d.
C-D
 

 36. 

The state of being free fromdanger, risk, or injury is:
a.
Engineering
c.
Mechanics
b.
First-AidSupplies
d.
Safety
 

 37. 

Which type of nail isrecommended for making concrete forms?
a.
Box
b.
Common
c.
Doubleheaded
d.
Finishing
 

 38. 

From how many locations can alight be controlled by using three-way switches?
a.
1
b.
2
c.
3
d.
4
 

 39. 

The two deadly hazardsassociated with electric current are:
a.
Bruises andcuts
c.
Fire and shock
b.
Edison andOhm
d.
Light and darkness
 

 40. 

The recommended wire size forcircuits designed for general purpose outlets is:
a.
4
b.
8
c.
10
d.
12
 

 41. 

Pipe size is usually identifiedby the:
a.
Inside diameter
c.
Outside diameter
b.
Length
d.
Thickness
 

 42. 

Because of its low cost andease of installation, which type of pipe is used in most water systems?
a.
Cast iron
b.
Galvanized
c.
Plastic
d.
Steel
 

 43. 

Concrete should be cured sothat it will:
a.
Dry quickly
b.
Dry slowly
c.
Freeze
d.
Remain wet
 

 44. 

Compared to using screws toconnect electrical wires, the amount of insulation that should be removed when connecting with wirenuts is:
a.
1/8 inch less
b.
1/8 inchmore
c.
1 inch less
d.
1 inch more
 

 45. 

The ground wire in nonmetallicsheathed cable stamped “12-3 w/g” is:
a.
Black
b.
Green orbare
c.
Red
d.
White
 

 46. 

The pressure per square inch inacetylene lines should not be above:
a.
1 pound
b.
5 pounds
c.
15 pounds
d.
25 pounds
 

 47. 

A dressed or planed 2 X 4 boardis actually:
a.
1-1/2 inches by 3-1/2 inches
c.
2 inches by 3-7/8inches
b.
1-1/2 inches by 4 inches
d.
2 inches by 4inches
 

 48. 

The ratio of rise to the widthof a building or the slope of the roof is the:
a.
Pitch
b.
Rise
c.
Run
d.
Ventilation
 

 49. 

Almost one-half the accidentsthat happen to farm people involve:
a.
Burns
b.
Falls
c.
Livestock
d.
Machinery
 

 50. 

Safety in an agriculturalmechanics shop or laboratory depends primarily on the:
a.
Cost of the equipment
c.
Safety color codes
b.
People who use the shop
d.
Safety rules displayed
 



 
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