Ag Mechanics #1

Which of the following letter classifications for plywood indicates that the exterior veneer has fewer imperfections (has a better appearance)?

• The letter A
• The letter B
• The letter C
• The letter D

What is the term used to describe a construction member placed between posts and girders in post frame buildings to strengthen and add rigidity to a building?

• Brace
• Purlin
• Joist
• Ridge Board

Which of the following statements is correct with respect to pressure treated lumber?

• Pressure treated lumber does not hold nails as well as untreated lumber
• Pressure treated lumber has greater nail holding power than untreated lumber
• Pressure treated lumber has the same nail holding power than untreated lumber
• Nails cannot be used to secure pressure treated lumber

What term identifies the highest point of a gable roof?

• Ridge
• Gusset
• Purlin
• Rafter

Which of the following quantities of lumber has the greatest number of board-feet?

• Six boards measuring 2 inches by 12 inches by 10 feet
• Eight boards measuring 1 inch by 6 inches by 10 feet
• Twelve boards measuring 2 inches by 4 inches by 10 feet
• Ten boards measuring 1 inch by 12 inches by 10 feet

How many sheets of standard sized, three-quarter inch plywood are needed to completely cover a floor measuring 36 feet by 24 feet? Note: Standard size plywood is 4 feet by 8 feet

• 27 sheets of plywood
• 24 sheets of plywood
• 36 sheets of plywood
• 40 sheets of plywood

The floor of a wooden structure can safely hold a maximum of 18 tons. If the average weight of wheat is 45 pounds per bushel, how many bushels of wheat can be stored on the floor of the wooden structure? Note: 1 ton = 2000 pounds

• 800 bushels
• 400 bushels
• 1600 bushels
• 3200 bushels

What is the approximate surface area, in square inches, for the end of a round concrete posts with a diameter of 6 inches? Area of circle = (π) x ( diameter)2 ÷ 4

• 28.26 square inches
• 18.84 square inches
• 75.36 square inches
• 113.04 square inches

The weight of wheat is 26.1 pounds per cubic foot and wheat is stored to a depth of 10 feet in a wooden storage bin. If the floor supports of the bin are spaced 4 feet apart, what is the maximum pressure, in pounds per square foot, applied to the supports? Formula: Pressure in pounds per square foot = (pounds per cubic foot) x (depth of wheat in feet)

• 261.0 pounds per square foot
• 1044.0 pounds per square foot
• 6.5 pounds per square foot
• 26.1 pounds per square foot

In electrical terminology, what is the meaning of the abbreviation AC?

• Alternating Current
• Arc Current
• Always Current
• Acetylene Current