网友您好， 请在下方输入框内输入要搜索的题目：
题目内容
（请给出正确答案）
单选题
To avoid damaging the components of a printed circuit board when testing it with a DC volt-ohmmeter, you should （）
A
ground the board
B
avoid reversing the polarity of the leads
C
isolate sensitive components with heat sinks
D
all of the above
参考答案
参考解析
解析：
暂无解析
更多 “单选题To avoid damaging the components of a printed circuit board when testing it with a DC volt-ohmmeter, you should （）A ground the boardB avoid reversing the polarity of the leadsC isolate sensitive components with heat sinksD all of the above” 相关考题
考题
For (71) service, we need a virtual-circuit subnet. Let us see how that works. The idea behind virtual circuits is to avoid having to choose a new (72) for every packet sent. Instead, when a connection is established, a route from the (73)machine to the destination machine is chosen as part of the connection setup and stored in tables inside the (74) That route is used for all traffic flowing over the connection, exactly the same way that the telephone system works. When the connection is released, the virtual circuit is also terminated. With connection-oriented service, each packet carries an (75) telling which virtual circuit it belongs to.A．connectionlessB．connection-orientedC．datagramD．telegram
考题
Catalog sheets submitted with the bid must be “originals” and not copies; drawings, schematics and/or circuit diagrams and printed circuit board diagrams must be ().A、legislativeB、legionaryC、legibleD、legal
考题
● Serialization delay and （71） delay are the two components of network delay that are improved by increasing bandwidth. Serialization delay, i.e. the amount of time it takes to put the （72） on the wire, and queuing delay (depth of the queue) are improved by increasing the （73） from a 128Kbps circuit to a T1. However, three other components of delay, routing/switching delay, distance delay, and protocol delay are components that can not be positively affected by an （74） in bandwidth. If the circuits are not over-utilized, then increasing the bandwidth to improve the （75） of the application will only result in an increased bandwidth with no positive effects on performance.
考题
A technician receives an error message ‘inaccessible boot device’ on their monitor. Which of thefollowing components is causing the issue?()
A. Hard disk drive failureB. NTLDR file is missingC. BIOS is corruptedD. System board failure
考题
A circuit breaker and a fuse have a basic similarity(类似) in that they both ______.A.can be reset to energize the circuitB.should open the circuit when overloadedC.will burn out when an over current flow developsD.should short the circuit when overloaded
考题
A circuit breaker and a fuse have a basic similarity in that they both______.A.can be reset to energize the circuitB.should open the circuit when overloadedC.will burn out when an over current flow developsD.should short the circuit when overloaded
考题
When weighing anchor in a rough sea，how would you avoid risk of damaging the bow plating ________．A.Heave it home as fast as you canB.Heave it home intermittently，between swellsC.Leave the anchor under foot，until the vessel may be brought before the seaD.Wait for a calm spot between seas，then house it
考题
On an ONS 15454 node you can tunnel a（n） （）.A、 SDH circuit over a SONET network delivering it as an SDH signalB、 SDH circuit over a SONET network delivering it as a SONET signalC、 SONET circuit over an SDH network delivering it as an SDH signalD、 SONET circuit over an SDH network delivering it as a SONET signal
考题
Which of the following is the term used to describe the aggregation of multiple components to formone logical component?（）A、BondingB、Circuit switchingC、CSMA/CDD、Channelization
考题
电子公告牌BBS的正确英语写法是（）A、Bulletin Board SystemB、Buletin Board SystemC、Bulltin Board SystemD、Bullitin Board System
考题
RBS2000由许多“Units”组成，它们通常称为（）。A、Software UnitsB、Replaceable UnitsC、Logical UnitsD、Printed Circuit Boards
考题
BBS的英文全称是（）。A、Bulletin Board SystemB、Board Bulletin SystemC、Board about SayD、Bulletin about Say
考题
On an ONS 15454 node you can tunnel an （）.A、SDH circuit over a SONET network delivering it as an SDH signalB、SDH circuit over a SONET network delivering it as a SONET signalC、SONET circuit over an SDH network delivering it as an SDH signalD、SONET circuit over an SDH network delivering it as a SONET signal
考题
A technician is performing preventive maintenance on the hardware components in a workstation. Which of the following actions should the technician take？ （）A、Remove the case front and clean the air vents.B、Unplug the capacitors from the board and clean the contacts.C、Remove the processor and clean the pins with an eraser.D、Remove the processor and clean any dust that has collected between the processor and the heatsink.
考题
A technician receives an error message ‘inaccessible boot device’ on their monitor. Which of thefollowing components is causing the issue?（）A、Hard disk drive failureB、NTLDR file is missingC、BIOS is corruptedD、System board failure
考题
Which of the following ATM components are needed to configure an ATM SVC （switched virtual circuit） classical IP interface？（）A、LESB、BUSC、LECSD、ARP server
考题
单选题In a series circuit, which value will remain unchanged at all places in the circuit?（）A
VoltageB
CurrentC
ResistanceD
Inductance
考题
多选题A technician is attempting to get into the BIOS and they are being prompted for a password. Which of the following can clear the BIOS password？（）APull the CMOS battery.BPull the 20/24 pin connector from the main board.CShort the reset circuit near the RAM.DUse the appropriate jumper on main board.EUse the reset button on the front panel.
考题
单选题On an ONS 15454 node you can tunnel a（n） （）.A
SDH circuit over a SONET network delivering it as an SDH signalB
SDH circuit over a SONET network delivering it as a SONET signalC
SONET circuit over an SDH network delivering it as an SDH signalD
SONET circuit over an SDH network delivering it as a SONET signal
考题
单选题Capacitance is the property of an electric circuit opposing a change in the （）A
current in the circuitB
voltage in the circuitC
inductance in the circuitD
resistance in the circuit
考题
单选题For (1) service, we need a virtual-circuit subnet. Let us see how that works. The idea behind virtual circuits is to avoid having to choose a new (2) for every packet sent. Instead,when a connection is established, a route from the(3) machine to the destination machine is chosen as part of the connection setup and stored in tables inside the (4) . That route is used for all traffic flowing over the connection, exactly the same way that the telephone system works.When the connection is released, the virtual circuit is also terminated. With connection-oriented service, each packet carries an (5) telling which virtual circuit it belongs to.
空白（3）处应选择（）A
sourceB
routeC
destinationD
host
考题
单选题A circuit that has one wire in contact with the hull of the ship is a（）A
series circuitB
grounded circuitC
short circuitD
closed circuit
考题
单选题Which of the following on-board components is used exclusively for exchanging data with remote machines？（）A
PCIB
USBC
AGPD
NIC
考题
单选题The purpose of a main switchboard circuit breakers reverse-power trip is to （）.A
prevent main circuit overloadB
protect the circuit breaker blowout coilC
prevent alternator motorizationD
prevent low voltage tripout
考题
单选题A circuit breaker differs from a fuse in that a circuit breaker （）.A
melts and must be replacedB
is enclosed in a tube of insulating material with metal ferrules at each endC
gives no visual indication of having opened the circuitD
trips to break the circuit and may be reset
考题
单选题询问船上健康状况。（）A
Enquire the health conditions on board.B
Enquire the safety conditions on board.C
Enquire the loading conditions on board.D
Enquire the fire conditions on board.
考题
单选题When weighing anchor in a rough sea，how would you avoid risk of damaging the bow plating （）.A
Heave it home as fast as you canB
Heave it home intermittently，between swellsC
Leave the anchor under foot，until the vessel may be brought before the SeaD
Wait for a calm spot between seas，then house it
热门标签
最新试卷
