SECTION 306.010 DIAMOND BLADE

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What is the purpose of the policy mentioned in Section 306.010?

To provide guidelines for safe operation of saws with diamond blades (correct)
To explain the different methods of constructing a diamond blade
To outline the department's history in using diamond blades
To discuss the cost of manufacturing diamond blades

When do the contents of this policy apply to all members?

During maintenance, training, or emergency operations (correct)
Only during training
Only during emergency operations
Only during maintenance

What type of saws are the diamond blades used for?

K-8 or the K-930 saws
K-10 or the K-920 saws
K-12 or the K-950 saws (correct)
K-15 or the K-970 saws

What is the arbor size for the K-12 saw?

$7/8$-inch (A) Signup and view all the answers

How is a diamond blade made using the sintered method?

The entire tool is heated along with the metal containing the diamonds and the metal matrix 'fuses' to the steel core in a permanent mold (B) Signup and view all the answers

What is the main distinguishing feature of diamond blades made by the brazed method?

They consist of diamonds embedded in a metal matrix which is bonded to the steel core using high pressure and temperature (A) Signup and view all the answers

What is the primary advantage of the brazing process for manufacturing diamond tools?

It offers flexibility in determining the hardness or softness of the metal matrix (C) Signup and view all the answers

How does the laser welding process differ from the brazing process for diamond tool manufacturing?

It involves individually making segments and then welding them to the steel core using a high-powered industrial laser machine (D) Signup and view all the answers

In the context of diamond tool cutting, why is it preferable to cut wet instead of cutting dry?

Dry cutting poses a respiratory danger associated with breathing dust and potential tool overheating (A) Signup and view all the answers

What is one effect of excess tool pressure against the material being cut?

The metal matrix may wear away too fast, leading to quick tool wearing out (A) Signup and view all the answers

How does the type of aggregate in the asphalt or concrete being cut affect diamond tool cutting speed and wear rates?

Sharp sand wears away the metal matrix more quickly than rounded sand, requiring higher diamond tool RPM and less tool pressure (A) Signup and view all the answers

What is the implication of a situation where the aggregate being cut is very hard and the sand is very sharp?

This type of cutting situation can cause diamond tools to be used up at two to five times the normal rate (B) Signup and view all the answers

What is one disadvantage of using dry blades for cutting?

Respiratory danger associated with breathing dust and potential tool overheating (A) Signup and view all the answers

What happens if the diamond tool RPM is too low?

The diamonds cannot fall out at the proper rate, slowing down the cutting of the tool (A) Signup and view all the answers

What is one effect of light tool pressure during cutting?

Light tool pressure may allow diamonds to dull without exposing new diamonds quickly enough, causing slow cutting (B) Signup and view all the answers

Why is it preferable to cut limestone aggregates at higher RPM?

Limestone aggregates are soft and can be cut at higher RPM for good tool life and fast cutting speed (D) Signup and view all the answers

What is one effect of using excess pressure during cutting flint and chert aggregates?

The metal matrix may wear away too fast, allowing diamonds to fall out before their ability to cut is fully utilized (B) Signup and view all the answers

What is one implication of using sharp sand in mixture of asphalt or concrete?

Sharp sand wears away the metal matrix more quickly than rounded sand, requiring higher diamond tool RPM and less tool pressure (C) Signup and view all the answers