單項(xiàng)選擇題

The cheek length of a block in inches should be about（）.

A.three times the circumference of a manila line
B.five times the diameter of a manila line
C.twice the diameter of its sheaves for manila line
D.twenty times the diameter of a manila line

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單項(xiàng)選擇題

The 12-foot low-velocity fog applicator（）.

A.has a spray pattern 12 feet in diameter
B.can be used in conjunction with both 1-1/2 inch and 2-1/2 inch all-purpose nozzles
C.has a 90°bend at its discharge end
D.has a screw thread end which connects to the all-purpose nozzle

單項(xiàng)選擇題

Splices made in nylon should（）.

A.be long splices only
B.have extra tucks taken
C.be short splices only
D.be around a thimble

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The cheek length of a block in inches should be about（）.

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The 12-foot low-velocity fog applicator（）.

Splices made in nylon should（）.

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