Describe dry chemical systems.

What will be an ideal response?


Dry chemical systems do not penetrate burning materials but remain on the surface and smother fire. Chemicals frequently used include sodium bicarbonate, potassium chloride, and monoammonium phosphate. They are effective on flammable liquid, electrical materials, and ordinary combustible materials. They have a high tolerance for extreme weather conditions and temperatures.

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The main advantage of the balled and burlapped method of production is that it is cheaper than other methods

Indicate whether the statement is true or false

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Which of the following front-end angles is defined as the forward or rearward tilt of the kingpin centerline when viewed from the side of the vehicle?

A. Camber B. Caster C. Toe D. Kingpin inclination

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In an interference fit, the clearance represents the maximum amount of interference.

Answer the following statement true (T) or false (F)

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How can you avoid the effects that wet brakes can cause

1) Slow down and place transmission in low gear.| 2) Gently put on the brakes and increase engine rpm, cross the water while keeping light pressure on the brakes. 3) When out of water maintain light pressure on the brakes for a short distance. 4) All of these answers are correct.

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