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
Machinery operating features are designed to help conserve energy.Which of the following results will not contribute to energy conservation?（）
A
Reduction of friction
B
Insulation of hot surfaces
C
Lubrication of moving parts
D
Elevation of cooler outlet temperatures
参考答案
参考解析
解析：
暂无解析
更多 “单选题Machinery operating features are designed to help conserve energy.Which of the following results will not contribute to energy conservation?（）A Reduction of frictionB Insulation of hot surfacesC Lubrication of moving partsD Elevation of cooler outlet temperatures” 相关考题
考题
Juncture refers to the features that help making a divisional contrast in meaning and that only involves pause.()
考题
For users, microkernel technology promises(90), compact and sophisticated operating systems that are typically(91)across a range of hardware platforms. These operating systems will be customizable to let users run multiple operating system and application "personalities" on top of a single microkernel(92).Microkernel based systems can provide this flexibility because the core operating system functions are(93)from the large number of utilities, features and extensions that are layered on top of them. As a result, updating and maintaining operating system is easier, since developers don't have to modify the(94)every time they must acid a new feature.A．slowB．fastC．quicklyD．speed
考题
Which of the following is NOT a recommended safe practice?A.Securing equipment against slipping or driftingB.Operating machinery at its recommended speedC.Repairing loose handles on tools before usingD.Using tools for purposes for which they are not designed
考题
CEOs of big companies decided to help colleges enroll more minority students because they_____.［A］think it wrong to deprive the minorities of their rights to receive education［B］want to conserve the fine characteristics of American nation［C］want a workforce that reflects the diversity of their customers［D］think it their duty to help develop education of the country
考题
Prolonged operation of a diesel engine with a closed cooling water system, at lower than normal designed operating temperatures can ______.A.increase power outputB.decrease lube oil viscosityC.eliminate fuel knockD.cause sulfuric acid formation
考题
A fixed carbon dioxide extinguishing system for a machinery space，designed WITHOUT a stop valve in the line leading to the protected space，is actuated by ______.A.one controlB.two controlsC.three controlsD.none of the above
考题
______ can be regarded as a vessel restricted in her ability to maneuver．A.Any aircraft designed to maneuver on the waterB.A vessel engaged in dredging，surveying or underwater operationsC.A vessel under sail provided that propelling machinery is not usedD.A small vessel sailing at night
考题
Which of the following features is involved in good textbooks?A.Good textbooks doesn’t help students feel at ease.
B.Good textbooks can’t help students develop confidence.
C.Good textbooks should maximize students’ learning potential.
D.Good textbooks should cater for students’ same learning styles.
考题
Which of the following features is not involved in good textbooks?A．Textbooks should help students feel at ease.
B．Textbooks should help students develop confidence.
C．Textbooks should maximize students' learning potential.
D．Textbooks should cater for students' same learning styles.
考题
What information does the help topic command provide?（）A、router’s version and serial number to help open a case with JTACB、software documentation describing features and configuration tasks within JUNOSC、a brief description of commands and their default valuesD、a verification of the current configuration on the router
考题
What two features in Cisco switches help prevent Layer 2 loops？（）A、UniDirectional Link DetectionB、Hot Standby Router ProtocolC、Virtual Router Redundancy ProtocolD、PortFastE、root guardF、loop guard
考题
Which of the following will help protect an operating system from vulnerability？（）A、Download free anti-virus programs from the Internet.B、Perform updates from the manufacturers website regularly.C、Using the operating systems email program only to open attachments.D、Monitoring what is displayed on the screen.
考题
单选题According to the woman, what harms our memories?A
Doing too much physical exercise.B
The number of devices in modern life.C
Devices designed to help us remember things.
考题
单选题The officer in charge of the engineering watch shall notify the chief engineer without delay （）.A
in any emergency or if in any doubt as to what decision or measures to takeB
in the event of any impending action in machinery spaces that may cause reduction in ship’s speedC
when isolating and bypassing machinery to be worked onD
co-operating with any engineer in charge of maintenance work
考题
单选题Operating a propulsion diesel engine at less than 30% of designed normal load for prolonged periods will result in （）.A
decreased fuel consumption per brake horsepowerB
more complete cylinder scavengingC
extended valve lifeD
carbon formation on combustion chamber surfaces
考题
多选题What two features in Cisco switches help prevent Layer 2 loops？（）AUniDirectional Link DetectionBHot Standby Router ProtocolCVirtual Router Redundancy ProtocolDPortFastEroot guardFloop guard
考题
单选题Which of the listed operating conditions would have the greatest effect on the volumetric efficiency of an operating reciprocating air compressor?（）A
The density of the air entering the compressorB
The temperature of the air entering the compressorC
The designed rotating speed of the compressorD
A leaking head gasket
考题
单选题What information does the help topic command provide?（）A
router’s version and serial number to help open a case with JTACB
software documentation describing features and configuration tasks within JUNOSC
a brief description of commands and their default valuesD
a verification of the current configuration on the router
考题
单选题An individual injection pump is designed for variable beginning and constant ending of injectionFor diesel engines operating at constant speeds, the start of injection will（）A
advance as the load increasesB
retard as the load increaseC
remain unchanged regardlessD
always occur at top dead center
考题
单选题The program _____ to help students prepare for their first year at our college.A
is designedB
designedC
designsD
has designed
考题
单选题Which of the listed statements is a characteristic of the liquid charged power element used with thermostatic expansion valves?（）A
At the designed operating temperature, the liquid refrigerant charge has changed to a vaporB
The liquid refrigerant tends to collect at the bellows or diaphragm and reduces the valve sensitivityC
The sensing bulb is empty of liquid refrigerant charge at the designed operating temperatureD
The sensing bulb is never emptied of liquid refrigerant under normal operating conditions
考题
单选题A fixed carbon dioxide extinguishing system for a machinery space，designed WITHOUT a stop valve in the line leading to the protected space，is actuated by（）.A
one controlB
two controlsC
three controlsD
none of the above
考题
单选题The simplest method to use for determining if a centrifugal pump is operating as designed, is to （）.A
closely observe the pump discharge temperatureB
close off the discharge valve, and watch for a rise in pressureC
momentarily close off the suction valve, and watch for a rise in pressureD
use a clamp on ammeter and compare the readings to past records
考题
单选题Which of the following is not a recommended safe practice?（）A
Securing equipment against slipping or driftingB
Operating machinery at its recommended speedC
Repairing loose handles on tools before usingD
Using tools for purpose for which they are not designed
考题
单选题A Class C EPIRB（）.A
is primarily designed for vessels operating up to 50 miles offshore or on foreign watersB
transmits a signal that can be detected by satelliteC
must be manually activatedD
operates in the medium and low frequency bands
考题
单选题Which of the following features is not involved in good textbooks?A
Textbooks should help students feel at ease.B
Textbooks should help students develop confidence.C
Textbooks should maximize students' learning potential.D
Textbooks should cater for students' same leaming styles.
考题
单选题During tours of inspection in the machinery space, you found a fire on a running generator, what should you do first?（）A
inform chief engineer officer immediatelyB
stop the generatorC
let the duty officer in bridge determine how to doD
wait for help
热门标签
最新试卷