List four of the major sources of electrical hazards in the workplace
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The major causes of electrical shock are as follows:
• Contact with bare wire carrying current. The bare wire may have deteriorated insulation or be normally bare.
• Working with electrical equipment that lacks the UL label for safety inspection.
• Electrical equipment that has not been properly grounded. Failure of the equipment can lead to short circuits.
• Working with electrical equipment on damp floors or other sources of wetness.
• Static electricity discharge.
• Using metal ladders to work on electrical equipment. These ladders can provide a direct line from the power source to the ground, again causing a shock.
• Working on electrical equipment without ensuring that the power has been shut off.
• Lightning strikes
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? Identify and state the historical significance of the Pullman Strike.
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Peter planted 510 acres of soybeans following corn. He treated it with 2.5 pints per acre of an herbicide that is sold in 21/ /2-gallon containers at $98.78 per container. Peter applied 31-80-80 units of fertilizer per acre. He used 46-0-0 urea at $503 per ton, 18-46-0 DAP at $702 per ton, and 0-0-60 muriate of potash at $570 per ton. He planted 88 pounds of soybeans per acre at $41.50 per 50-pound bag. He made three trips per acre preparing it for planting, using an average of 0.98 gallon of fuel per trip. Fuel sells for $3.21 per gallon. He used a combine with a 20-foot reel traveling 3.5 miles per hour, using 0.98 gallon of fuel per acre. His field has a harvesting efficiency of 0.78. He had a yield of 46.8 bushels per acre.
a. How many containers of herbicide were purchased? b. How many tons of fertilizer were applied? c. How many gallons of fuel were used? d. From the information given, what was the total expense? e. Using the formula HC = (S × W × EFF × Y) ÷ 8.25, what was the harvesting capacity?
Which of the following is essential to long turbocharger life?
A) Flush the turbocharger unit when the engine is overhauled. B) Keep dirt particles and contamination out of intake and exhaust housings. C) Maintaining a clean supply of engine oil. D) All of these are correct.
Describe and explain the basic function of the vernier caliper.
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