Describe the characteristics of concrete block cores.
What will be an ideal response?
Block cores are typically tapered so that the top surface of the block has a greater surface on which to spread a mortar bed. There may be two, three or four cores, although two cores are the most common configuration. The core configuration allows steel reinforcing to be inserted into the assembly, greatly increasing its strength. Reinforced cores are filled with grout to secure the reinforcing in proper relationship to the structure, and to bond the block and reinforcing. The reinforcing is primarily used to impart greater tensile strength to the assembly, improving its ability to resist lateral forces such as wind load and seismic forces.
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A ____ section provides the means for removing or inserting trolleys. This section contains two hinged doors that open when a lever is raised.
A. run B. drop-out C. switch D. curved
Technician A says that low pressure smoke installed in the fuel system can be used to check for leaks
Technician B says that nitrogen under low pressure can be installed in the fuel system to check for leaks. Which technician is correct? A) Technician A only B) Technician B only C) Both technicians A and B D) Neither technician A nor B
A drive center or face driver makes possible the:
A) Facing off the rough end of a shaft or in the case of a drive center, the truing up of the center by a kind of reaming B) Driving of a face plate C) Driving work between centers so that a cut can be taken full length D) Driving of tubular material without chucking it
Once a bed of compound and tape has been applied in interior corners, the tape is smoothed using a _____
a. flat finisher b. corner applicator c. BAZOOKA® d. corner roller