Ag Mech 2023 National Exam

A combine costs $1.55 per acre, what is the cost to operate the combine for a rectangular field measuring 2147 meters by 0.85 miles?

1 acre = 43, 560 square feet

1 foot = 0.3048 meter

• $578.60

• $613.50

• $1,123.50

• $1,124.90

A variety of incandescent lights are all operating on a single 120-volt electrical circuit in a livestock barn. The circuit includes ten 150-watt lights, three 300-watt lights, and twelve 40-watt lights. What is the amperage of the circuit with all of these lights operating?

Total Wattage = Voltage x Amperage

• 13.2 amps

• 17.5 amps

• 23.2 amps

• 24.0 amps

For a naturally aspirated engine, what component mixes air and fuel in the proper ratio for efficient combustion?

• Throttle body

• Choke Valve

• Carburetor

• Injector

If 112 feet of angle iron, 95 feet of tubing, and twelve 20-foot lengths of rebar are purchased, and 6.67% taxes are paid with the purchase, what is the approximate total price for the metal?

• $474.96

• $493.96

• $524.96

• $571.04

Refer to the enlarged view of contour lines (in feet) on the topographic map at the right of the page. What is the elevation of the line marked by the arrow?

• 2980 feet

• 3500 feet

• 4100 feet

• 4600 feet

Using the foresight rod measurement marked with the arrow in the image provided, what is the elevation of the unknown point? Assume a benchmark elevation of 1,252 feet and a backsight of 2.45. A Philadelphia rod is used.

• 1,242.20 feet

• 1,247.02 feet

• 1,254.45 feet

• 1,261.80 feet

For a hydraulic cylinder, which dimension determines the output force in psi?

• Diameter of the cylinder

• Length of the cylinder

• SAE grade of the hydraulic oil

• The horsepower of the hydraulic pump

Electrical: Circuit protection devices for motor circuits incorporate a time-delay component to allow for a brief period of overload needed for electric motor ________________.

• controllers

• cool-down

• starting

• shifting

Which component would not be at fault when troubleshooting the fuel delivery system of a gravity-feed float bowl style carburetor?

• Fuel pump

• Emulsion tube

• Fuel hose

• Float-needle

For a non-family placement/internship agricultural production SAE, what is the FLSA maximum height that a person under 16 years old may work from using a ladder or scaffold?

• 15 feet

• 18 feet

• 20 feet

• 25 feet