单选题Which of the following statements represents the FIRST precaution to be taken prior to working on any installed electrical component （）AWear rubber gloves and bootsBUse only approved non-conducting toolsCGround the case of the machine before beginning any repairsDOpen the supply circuits and tag the switches
单选题
Which of the following statements represents the FIRST precaution to be taken prior to working on any installed electrical component （）
A
Wear rubber gloves and boots
B
Use only approved non-conducting tools
C
Ground the case of the machine before beginning any repairs
D
Open the supply circuits and tag the switches
参考解析
解析：
暂无解析
相关考题：
Which of the following statements represents the function of the compression rings installed at the top of a diesel Engine piston?A.Control the amount of lube oil burned in the combustion chamberB.Transmit heat from the piston to the cylinder linerC.Prevent damage to ring groove inserts by acting as a heat damD.Dissipate combustion chamber gas pressure by channeling it through the ring gap
Which of the following statements is true?A. The author's father built a bonfire on VE Day.B. The author's father had fought in the First World War.C. The author's father had fought in the Second World War.D. The author's father threw two chairs on the fire to keep it going.
Which of the following statements represents an advantage of an electromagnetic clutch?A.Large misalignments can be tolerated between the shaft and engine couplingB.Slip is held to a minimum when reversing shaft rotationC.Engine torsional vibrations to the driven shaft are eliminatedD.It aids in maintaining power factor
Which of the following statements is NOT a way of consolidating vocabulary A.Defining.B.Matching.C.Gapfilling.D.Labeling.
Which 4 statements regarding MPLS Label Stack Encoding is true？（）A、A value of 4 represents the "Implicit NULL Label."B、A value of 0 represents the "IPv4 Explicit NULL Label."C、A value of 1 represents the "Router Alert Label". The use of this label is analogous to the use of the"Router Alert Option" in IP packets （for example， ping with record route option）D、A value of 2 represents the "IPv6 Explicit NULL Label"E、A value of 1 represents the "IPv1 Explicit NULL Label"F、A value of 3 represents the "Implicit NULL Label"
Which of the following represents a wiring standard for twisted pair cables?（）A、FiberB、T568AC、IEEE1394D、CAT5
The "1000" in 1000BaseT cabling represents which of the following?（）A、The theoretical maximum cable lengthB、The theoretical maximum bandwidthC、The theoretical port limit of the cableD、The quality level of the copper wiring used
Which of the following represents a safety hazard？（）A、liquid on the floorB、a tiled floorC、a concrete floorD、carpet
Which of the following describes what the number two represents in l00Base2 cabling?（）A、FiberB、Coaxial cableC、UTPD、Twisted pair
Which of the following will begin a new unit of work?（）A、The CONNECT statementB、The first FETCH of a cursorC、The BEGIN TRANSACTION statementD、The first executable SQL statement
The internet address 198.102.27.120 represents which of the following addresses？（）A、Class AB、Class BC、Class CD、Class D
单选题Which of the following best describes the rela- tionship between the statement in lines 7-8 (To get an edge,.your gut) and the statement in lines 22-24 (Trust them,.within you)?AThe first represents a generalization about intuition, while the second represents a specific example of that general idea.BThey represent two contrasting recommendations about intuition.CThey reflect different stages of the author's evolving perspective on intuition.DThey are both recommendations from people who value the power of intuition.EThe first represents a medical opinion, while the second represents a popular misconception.
多选题Concerning the figure below, if a =b, which of the following statements must be true? (Indicate all such statements.)Ac=dBl and k are parallelCm and l are perpendicular
多选题Which of the following statements are true? (Indicate all such statements.)Aτ(5) =τ(7)Bτ(5) τ(7) =τ(35)Cτ(5) + τ(7) =τ(12)
单选题Which of the following statements represents an advantage of an electromagnetic clutch?（）ALarge misalignments can be tolerated between the shaft and engine couplingBSlip is held to a minimum when reversing shaft rotationCEngine torsion vibrations to the driven shaft are eliminatedDIt aids in maintaining power factor
单选题Which of the following statements is TRUE concerning the po column of the vmstat command？（）A The sys is high when po is high.B The po represents the number of page steals.C The low values usually indicate insufficient paging space.D The low values usually indicate sufficient memory for the load.
单选题Which of the following statements is NOT a way of consolidating vocabulary?ADefining.BMatching.CGap-filling.DLabeling.
单选题Which of the following statements represents the correct action to take when three crew members discover a fire?（）AOne man report the fire, and the other two men fight the fireBOne man report the fire, one man fight the fire, and one man evacuate and secure the areaCOne man report the fire, one man fight the fire, and one man act as a safety observerDAll three men fight the fire and report it immediately after it is extinguished
单选题Which of the following statements represents the FIRST precaution to be taken prior to working on any installed electrical component （）AWear rubber gloves and bootsBUse only approved non-conducting toolsCGround the case of the machine before beginning any repairsDOpen the supply circuits and tag the switches
单选题Which of the following statements represents the main difference between a relay and a contactor?（）AContactors control current and relays control voltageBA relay is series connected and a contactor is parallel connectedCContactors can handle heavier loads than relaysDContactors are made from silver and relays are made from copper
单选题Which of the following statements represents the reason for rolling over a diesel engine with the cylinder indicator cocks open prior?（）ATo test the starting systemBTo remove air bubbles from the jacket waterCTo ensure that the lube oil system delivers pressureDTo ensure foreign material (water etc) is not present in the cylinders
单选题Which of the following statements is TRUE?APeople with seat belts tied will always be safe in cars.BVolvo was the first carmaker to use seat belts in cars.CAir bags will come out before the cars hit something.DAll cars have air bags in front of the seats.
单选题Which of the following represents a wiring standard for twisted pair cables?（）AFiberBT568ACIEEE1394DCAT5
单选题Which of the following represents a safety hazard？（）Aliquid on the floorBa tiled floorCa concrete floorDcarpet
单选题Which of the following most closely represents an image copy? （）AUnix cp command of a fileBBit-by-bit copy of a fileCWindows COPY command of a file DAll of the above
多选题Which 4 statements regarding MPLS Label Stack Encoding is true？（）AA value of 4 represents the Implicit NULL Label.BA value of 0 represents the IPv4 Explicit NULL Label.CA value of 1 represents the Router Alert Label. The use of this label is analogous to the use of theRouter Alert Option in IP packets （for example， ping with record route option）DA value of 2 represents the IPv6 Explicit NULL LabelEA value of 1 represents the IPv1 Explicit NULL LabelFA value of 3 represents the Implicit NULL Label