更多"The crankcase cover should never be"的相关试题:
[单项选择]A compressor should never be stopped （）.
A. without first cooling it
B. without first heating it
C. without first unloading it
D. without first loading it
[单项选择]The crank-room cover should not be opened until at least （） minutes after the engine stops.
A. 10
B. 15
C. 20
D. 30
[单项选择]A centrifugal pump vibrates excessively during operationUpon disassembling the pump it is found that the impeller is out of balanceWithout an available spare, you should （）.
A. drill holes through the heavy side of the impeller until it balances
B. weld counterweights to the light side of the impeller
C. remove metal from the heavy side by machining in a lathe
D. acid wash and serape the heavy side until it balances
[单项选择]An overcorrecting and unstable engine governor operation is known as（）.
A. droop
B. dead banding
C. dash potting
D. hunting
[单项选择]Which conditions will normally cause a SART to operate in the active mode?（）
A. It will respond only to interrogation by 9-Ghz radar signals
B. A SART will normally respond to interrogation from a searching vessel's radar if the radar antenna is at least 15 meters high
C. A SART will normally respond to interrogation from a searching aircraft's radar if the radar's output power is at least 10，000 watts and the aircraft is at a height of 3000 feet and within 30 nautical miles
D. All of the above
[单项选择]A portable foam fire extinguisher is placed in operation by（）
A. turning it upside down
B. pressing the foam lever
C. squeezing the grip handle
D. opening the hose valve
[单项选择]Which of the terms listed below represents the operational speed at which excessive engine vibration is created?（）
A. Non-harmonic speed
B. Critical speed
C. Maximum speed
D. Design maximum speed
[单项选择]When ship navigating in rough sea, the correct operation is （）
A. navigating with a low diesel engine speed
B. navigating with a stable diesel engine speed
C. increasing the efficiency of propeller
D. increasing fuel injection
[单项选择]The plunger in the fuel injector pump, usually operated by a （）, is driven up and down when working.
A. crankshaft
B. camshaft
C. piston rod
D. rack and pinion
[单项选择]An orange and white buoy marking an area where operating restrictions are in effect will be marked with which symbol? （）
A. Open-faced diamond
B. Diamond with a cross
C. Circle
D. Rectangle
[单项选择]Which of the conditions listed may occur in an operating diesel engine if air pockets form within the cylinder head circulating water passages? （）
A. Hydraulic stress and distortion will develop
B. Hot spots will develop
C. Fuel oil viscosity will increased
D. An increase in trapped deposits of scale and dirt
[单项选择]The term （） refers to one complete sequence of operations required to produce power in an engine.
A. diesel engine
B. stroke
C. cycle
D. compression ratio
[单项选择]Start the turning gear, and with some one hand-operating the cylinder lubricators at regular intervals, and with the indicator cocks （）, and with the control gear in the （）position, give the engine at least one complete turn.
A. open；“stop”
B. closed；“stop”
C. open；“start”
D. closed；“start”
[简答题]请简述OPE收费业务管理应用程序中包含的功能？
[多项选择]200H车载设备VC单元OPE8-6A的作用（）。
A. 接收速度信号
B. 接收轨道电路信息
C. 进行速度比较
D. 设备整体的故障检测
[多项选择]SNMPv3 authorizes management operations only by configured users and encrypts SNMP messages. Which authentication protocols does Cisco NX-OS Software use for SNMPv3？（）
A. NMAC-SHA-96 authentication protocol
B. HMAC-MD5-96 authentication protocol
C. Community String Match protocol
D. NMAC-MD5-96 authentication protocol
E. HMAC-SHA-96 authentication protocol
[简答题]对OPE系统中车道通行观察代码为“4”的交易信息，站监控员处何处理？
[多项选择]CTCS2-200H型车载列控系统VC-OPE8板的作用是将制动指令（）传输给AMP板。
A. BR7
B. BR4
C. BR1
D. EB
