NO.20 The physical attributes testing of manufactured bricks during pre-shipment testing shall require a minimum Acceptable Quality Limit (AQL) of:

NO.21 Forms (types) of refractory

NO.22 A change in the length of a specimen measured before and after heating to a specific temperature is referred to as:

NO.23 Newly applied cast linings must cure before stripping the forms per the:

NO.24 The formation of slag takes place by chemical action and fusion at furnace operating temperature in the way of

NO.25 A layer coat of refractory lining that is applied to an existing lining in an attempt to extend the lining’s life is known as:

NO.26 Applicator qualification for plastic thick layer, the test panel with an applied lining thickness and anchorage shall be

NO.27 Which of the following is the inspector responsible for?

NO.28 Modulus of rupture test for castable refractories, the test specimen shall be

NO.29 The term that describes the condition of pre-set refractory in which gravitational forces cause it to lose its desired shaped is called

NO.30 The destructive chemical reaction between refractories and external agencies at high temperatures, resulting in the formation of a liquid is called

NO.31 Test results received from cast sample mock-ups will serve to qualify the:

NO.32 Mechanical wearing away of the surfaces of refractory bodies in service by washing action of moving liquid or gases is called

NO.33 Fiber concentrations typically range is

NO.34 The property of matter by virtue of which heat energy is transmitted through particles in contact.

NO.35 Metallic anchor made from rod or bar and usually used for dual layer linings that are configured in