2007 State Agricultural Mechanics Written Examination
Directions: Place your name, chapter, and contestant number on the accompanying scantron form that you will receive from the test administrators. Read each of the following multiple-choice items and the possible answers carefully. Mark the letter of the correct answer on your answer sheet (scantron form) as instructed by the test administrators. PLEASE MAKE NO MARKS ON THIS TEST.
1. Which safety color is used to indicate the presence of safety and first aid equipment?
a. Blue
b. Green
c. Yellow
d. White Agricultural Mechanics, 4th Edition, page 37
2. Which determines the classification of wood as either softwood or hardwood?
a. Age of wood
b. Firmness of wood
c. Strength of the wood when exposed to weather
d. Whether the tree sheds leaves in the winter
Agricultural Mechanics, 4th Edition, page 103
3. Electrical current which reverses its direction of flow frequently is:
a. Alternating.
b. Direct.
c. Positive polarity.
d. Straight polarity. Agricultural Mechanics, 4th Edition, page 319
4. Which is MOST characteristic of conventional tillage?
a. Crop seed placed directly into the residue of the previous crop
b. Current planting done without disturbing the topsoil
c. Disking and plowing to incorporate previous crop into the soil
d. Double-cropping soybeans in the stubble of wheat or oats
Handbook for Land Judging in North Carolina, 5th Edition
5. Which is the BEST wood preservative when treating material to be painted?
a. Cresote
b. Mineral spirits
c. Pentachlorophenol
d. Rustoleum Agricultural Mechanics, 4th Edition, page 360
6. When storing pesticides in an agricultural shop, it is BEST to store the chemicals:
a. Close to the ventilation fan.
b. In a locked cabinet or separate locked room.
c. Near the welding booths to prevent freezing in winter.
d. Under work benches.
Agricultural Mechanics, 4th Edition, page 50
7. Electric motors that are larger than ½ horsepower run more efficiently and cause less voltage drop problems if operating with:
a. 120 volts.
b. 230 volts.
c. Moderating current.
d. Single-phase current. Agricultural Mechanics, 4th Edition, page 463
8. The MOST likely reason for changing an “O ring” on a faucet is to:
a. Create a smooth stream coming from the faucet.
b. Increase water pressure.
c. Prevent freezing.
d. Stop dripping. Agricultural Mechanics, 4th Edition, page 493
9. Which land capability class is MOST likely subject to leaching problems?
a. I
b. IIw
c. IIIe
d. IVs Handbook for Land Judging in North Carolina, 5th Edition
10. Which weld is laid between two pieces of metal set edge to edge or end to end?
a. Butt
b. Fillet
c. Spot
d. Tack Agricultural Mechanics, 4th Edition, page 704
11. When lighting the oxyacetylene torch, the acetylene cylinder valve should be:
a. Closed until after the torch is lit.
b. Greased prior to opening.
c. Opened completely.
d. Opened no more than ½ turn. Agricultural Mechanics, 4th Edition, page 283
12. When using the miter gage for crosscutting with a table saw, a kick back may be caused by:
a. A properly installed blade guard.
b. Also using the rip fence to guide the board.
c. Holding the board against the miter gage.
d. Saw blade teeth extended just above the wood being cut.
Agricultural Mechanics, 4th Edition, page 193
13. What is a MAJOR difference in using hydraulic fluid as compared to air pressure to transfer force?
a. Air pressure needs to circulate through a circuit.
b. Hydraulic fluid can be compressed, but air can not.
c. Hydraulic fluid cannot be compressed, but air can be.
d. Hydraulic fluid depends on the use of pneumatics.
Agricultural Mechanics, 4th Edition, page 516
14. Plywood with both sides smooth, paintable, and suitable for natural finish is grade:
a. AA
b. AB
c. AC
d. AD Agricultural Mechanics, 4th Edition, page 559
15. Which tool would be MOST helpful when laying out terraces?
a. Increment borer
b. Micrometer
c. Transit
d. Zigzag rule
Handbook for Land Judging in North Carolina, 5th Edition
16. What advantage does the E6011 electrode have over the E6013 electrode? The E6011 electrode:
a. Does not produce slag and is easier to see when welding.
b. Gives deeper penetration for a stronger weld.
c. Is easier for the beginning welder to use.
d. Makes a more attractive weld to help students develop confidence.
Agricultural Mechanics, 4th Edition, page 324
17. Which fastener is BEST for hanging sheetrock?
a. Deck screw
b. Drywall screw
c. Finishing nail
d. Roofing nail Agricultural Mechanics, 4th Edition, page 76
18. If a farmer wishes to automatically control a night light outside a barn, he/she should use a:
a. LED (light-emitting diode).
b. Oscillator.
c. Photoconductive cell.
d. Video amplifier.
Agricultural Mechanics, 4th Edition, page 453
19. Timbers that carry the weight of floors and interior walls are:
a. Girders.
b. Joist.
c. Rafters.
d. Studs. Agricultural Mechanics, 4th Edition, page 555
20. Which treatment is used to prevent erosion on open, large fields with a smooth, loose, and droughty sandy surface layer over 20″ deep?
a. Chiseling
b. Disking
c. Terraces
d. Windbreak Handbook for Land Judging in North Carolina, 5th Edition
21. What is a MAJOR advantage of using soapstone to mark metal for cutting?
a. Brushes off real easily
b. Blends in with most metals
c. Permanent mark
d. Shows up well
Agricultural Mechanics, 4th Edition, page 141
22. Which describes a Slow Moving Vehicle (SMV) emblem?
a. Black rectangular flag with reflective yellow and red stripes
b. Fluorescent orange triangle with red reflective borders
c. White square with reflective red tractor in the center
d. Yellow circle with a reflective blue line through the middle
Agricultural Mechanics, 4th Edition, page 49
23. In the air-cooled small engine, the fins on the flywheel are used to:
a. Create a velocity of moving air.
b. Keep the engine clean from debris.
c. Pump water through the cooling system.
d. Remove fumes from the motor.
Agricultural Mechanics, 4th Edition, page 393
24. Which is the BEST material to provide a rustproof screw where severe moisture is a problem?
a. Blued finish
b. Cadmium finish
c. Chromium finish
d. Solid brass
Agricultural Mechanics, 4th Edition, page 76
25. If one pot in a drip irrigation system of 100 pots is not getting enough water, one should check the:
a. Emitter.
b. Humidstat.
c. Solenoid valve.
d. Timer. Agricultural Mechanics, 4th Edition, page 505
26. Which metal is the BEST choice for use as a milk tank or where sanitation is necessary?
a. Cast iron
b. Copper
c. Stainless steel
d. Wrought iron Agricultural Mechanics, 4th Edition, page 138
27. What is a disadvantage of the power hacksaw as compared with the horizontal band saw? The power hack saw blade is brittle and:
a. Cuts slower.
b. Moves in only one direction.
c. Needs less lubrication.
d. Will not cut metal. Agricultural Mechanics, 4th Edition, page 210
28. Which oil has the highest viscosity or flow at low temperatures?
a. SAE 10
b. SAE 20
c. SAE 50
d. SAE 60
Agricultural Mechanics, 4th Edition, page 521
29. A 1-2-3 mix of concrete has:
a. 1 part cement, 2 parts fine aggregate, and 3 parts coarse aggregate.
b. 1 part coarse aggregate, 2 parts fine aggregates, and 3 parts cement.
c. 1 part fine aggregate, 2 parts cement, and 3 parts water.
d. 1 part sand, 2 parts cement, and 3 parts water.
Agricultural Mechanics, 4th Edition, page 536
30. The unit of measurement used to designate the length of most nails is the:
a. Inch (″).
b. Millimeter (mm).
c. Penny (d).
d. Pound (lb). Agricultural Mechanics, 4th Edition, page 74
31. Why should galvanized nails not be used when nailing aluminum such as siding? Galvanized nails will:
a. Dent the aluminum and cause leaks.
b. Look different and create an unsightly appearance.
c. React with and destroy the aluminum they touch.
d. Rust and break when exposed to weather.
Agricultural Mechanics, 4th Edition, page 76
32. Which is not a component of the fire triangle?
a. Fuel
b. Heat
c. Oxygen
d. Water Agricultural Mechanics, 4th Edition, page 46
33. What is the first thing to check when a small engine fails to start?
a. Compression of the cylinder
b. If there is fuel in the gas tank
c. Improper carburetor adjustment
d. The gap on the spark plug
Small Engines, 8th Edition, page 212
34. Which is a tapered, rectangular shaped nail used for wood flooring and fastening masonry materials?
a. Common
b. Cut
c. Finishing
d. Staple
Agricultural Mechanics, 4th Edition, page 74
35. If one wishes to change the size of PVC from a ¾″ line to a ½″ line, which should be used?
a. Bushing
b. Coupling
c. Elbow
d. Plug Agricultural Mechanics, 4th Edition, page 491
36. Which is a flexible, elastic type material used to fill air gaps and cracks in construction joints?
a. Caulk
b. Cement
c. Insulation
d. Putty Agricultural Mechanics, 4th Edition, page 362
37. Which is BEST when storing oily rags?
a. Leave them on shop tables
b. Place them in a closed metal container
c. Place them in a bucket of water
d. Stack them in a pile on the floor Agricultural Mechanics, 4th Edition, page 57
38. Neutral wires are connected to receptacles by screws colored:
a. Black.
b. Green.
c. Silver.
d. Yellow. Agricultural Mechanics, 4th Edition, page 437
39. If a white wire is used as a positive wire in a light switch, the wire should be:
a. Connected to the ground wires in the fixture.
b. Folded back in the box and left disconnected.
c. Painted black or marked with black tape.
d. Painted yellow or marked with yellow tape.
Agricultural Mechanics, 4th Edition, page 437
40. Which pipe material is lightweight and BEST for hot water lines?
a. ABS
b. Cast iron
c. Chlorinated polyvinyl chloride (CPVC)
d. Polyvinyl chloride (PVC)
Agricultural Mechanics, 4th Edition, page 488
41. When a welder has the correct arc length, the sound of the arc is that of:
a. A low hum.
b. Bacon frying.
c. High pitched sirens.
d. Thumping a watermelon.
Agricultural Mechanics, 4th Edition, page 338
42. Which is the BEST first aid treatment to avoid serious eye injury from foreign materials?
a. Clean the eyes immediately at an eye wash station
b. Cover the eyes with sterile patches soaked in eye drops
c. Gently remove the material with a clean shop towel
d. Put on a pair of sun shades until ship work is finished
Agricultural Mechanics, 4th Edition, page 39
43. What part of the ignition system of a small engine needs the MOST care?
a. Armature
b. Flywheel magnet
c. Spark plug
d. Venturi Agricultural Mechanics, 4th Edition, page 402
44. A concrete base that provides a solid, level foundation to support walls is the:
a. Footer.
b. Form.
c. Mortar bed.
d. Vapor barrier. Agricultural Mechanics, 4th Edition, page 537
45. Which welding application is similar to oxyacetylene welding in that a filler rod is used and provides the best looking weld on aluminum, but is also slower than other welding applications used for aluminum?
a. AC
b. DC
c. MIG
d. TIG Agricultural Mechanics, 4th Edition, page 351
46. What type of joint uses thin, oval-shaped pieces of wood that are fitted and glued into slots cut into the edge of the boards to be joined?
a. Biscuit
b. Butt
c. Dado
d. Lap Agricultural Mechanics, 4th Edition, page 118
47. What is the MAJOR advantage of having a Bill of Materials for a project?
a. Eliminates the need for a project plan with detailed drawings and dimensions
b. Helps avoid costly errors and reduces time needed to secure materials
c. Makes more trips to the building supply store necessary
d. Reduces the time required to actually construct the project
Agricultural Mechanics, 4th Edition, page 239
48. How can one cheaply ensure that concrete will not stick to the wooden forms?
a. Coat the forms with used motor oil
b. Shovel soil on the outside of the forms
c. Spray the forms with water
d. Use pressure treated lumber Agricultural Mechanics, 4th Edition, page 538
49. Which size copper wire is normally used for a 15 amp circuit?
a. 10
b. 12
c. 14
d. 16 Agricultural Mechanics, 4th Edition, page 428
50. When compared to bolt threads, pipe threads are:
a. Cut on the full the length of the pipe.
b. Identical in distance and uniformity to bolt threads.
c. Tapered and cut on only about 1″ of the pipe.
d. Uniform and cut on only about 1″ of the pipe.
Agricultural Mechanics, 4th Edition, page 159
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