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Wires that are installed in air returns above a ceiling must be（）
- A、fire proof
- B、fiberglass coated
- C、plenum rated
- D、teflon coated
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更多 “Wires that are installed in air returns above a ceiling must be（）A、fire proofB、fiberglass coatedC、plenum ratedD、teflon coated” 相关考题
考题
A mooring line is described as being 6x24, 1-3/4 inch wire rope. What do the above numbers refer to ? ______.A.Strands, yarns, circumferenceB.Strands, wires, diameterC.Wires, yarns, diameterD.Strands, circumference, wires
考题
这些绑扎工具必须要再次上紧。（）A、These lashing tools must be tightened again.B、These lashing wires must be tightened again.C、These lashing bars must be secured again.D、These cargo wires must be loosened again.
考题
Which three of these are characteristics of UTP cable？（）A、The wires in each pair are wrapped around each otherB、An insulating material covers each of the individual copper wires in itC、It comes in eight-pair wire bindlesD、EMI and RFI cause only limited degradation to signals running over itE、It comes in seven categoriesF、IT has an external diameter of approximately 0 28 inches
考题
Which of the following BEST describes CAT5e？（）A、Contains four pair of wires of various gaugeB、Contains two wires in a red fireproof jacketC、Contains four twisted pairs of wiresD、Contains eight wires within a thick jacket with a rip cord
考题
单选题A mooring line is described as being 6x24，1-3/4 inch wire rope. What do the above numbersrefer to?（）A
Strands，yarns，circumferenceB
Strands，wires，diameterC
Wires，yarns，diameterD
Strands，circumference，wires
考题
多选题Which three of these are characteristics of UTP cable？（）AThe wires in each pair are wrapped around each otherBAn insulating material covers each of the individual copper wires in itCIt comes in eight-pair wire bindlesDEMI and RFI cause only limited degradation to signals running over itEIt comes in seven categoriesFIT has an external diameter of approximately 0 28 inches
考题
单选题我们需要大量的绑扎钢丝。（）A
We need plenty of clamps.B
We need plenty of lashing wires.C
We need plenty of cargo wires.D
We need plenty of lashing bars.
考题
单选题A 6x19 wire rope would be（）.A
6 inches in diameter and 19 fathoms longB
6 inches in circumference with 19 strandsC
6 strands with 19 wires in each strandD
19 strands with 6 wires in each strand
考题
单选题What is the main reason to slush a wire rope?（）A
Keep the wire soft and manageableB
Lubricate the inner wires and prevent wearC
Prevent kinkingD
Prevent rotting
考题
单选题The （） is used for hauling in or letting out the wires or ropes which will fasten the ship to the shore.A
cranesB
winch barrelC
capstansD
windlass
考题
单选题Topping wires fix the height of the derricks and （） to the deck may be used to prevent fore and aft movement.A
staysB
winchesC
barrelsD
brakes
考题
单选题The （） is used to handle the ropes and wires.A
steering gearB
windlassC
deck craneD
warping drum
考题
单选题A common class of wire rope used for mooring is the 6x19 class. What does the 6 represent?（）A
Factor of safetyB
Number of wires per strandC
Number of strands per wire ropeD
Number of wires in the core
考题
单选题（）are used to secure the second and the third tiers of containers.A
TurnbucklesB
Lashing barsC
Twist locksD
Lashing wires
考题
单选题opes or wires attached to derricks to prevent them from swinging during cargo handling operations are（）.A
PreventersB
Side ropesC
StaysD
Guide lines
考题
单选题When cutting wire rope，seizings are put on each side of the cut.The seizings prevent the wire from unlaying and also（）.A
Maintain the original balance of the tension in the wires and strandsB
Prevent moisture from entering between the wires at the cut endC
Forces lubricant from the core to protect the raw，cut endD
All of the above
考题
单选题这些绑扎工具必须要再次上紧。（）A
These lashing tools must be tightened again.B
These lashing wires must be tightened again.C
These lashing bars must be secured again.D
These cargo wires must be loosened again.
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