[单项选择]The operating medium for control systems may be （）.
A. compressed air
B. hydraulic oil
C. electricity
D. All of the above

[单项选择]Diesel engine automated control systems may utilize sensing devices of dual function, with sensing ranges providing both alarm and engine shut down capability.Which of the key points would only require an alarm sensor?（）
A. Lube oil pressure and temperature
B. jacket water pressure and temperature
C. Engine over-speed
D. Lube oil sump level

[单项选择]Engine operating conditions may be indicated by the color of the exhaust smoke.Black smoke could indicate（）
A. an insufficient speed droop setting
B. an overloaded engine
C. clogged drain holes in the oil control rings
D. complete combustion

[单项选择]The Port State Control officer may witness a fire drill carried out by the crew assigned to these duties on the （）
A. Navigation Log Book
B. Engine Room Log Book
C. Oil Record Book
D. Muster List

[单项选择]Pistons of marine medium speed diesel engines may be made of （） in order to keep the weight down for balancing purpose at high speed.
A. lead
B. forged steel
C. alloy steel
D. aluminum alloy

[单项选择]Fire detecting systems on merchant vessels may be arranged to sense （）.
A. smoke
B. rate of temperature rise
C. ionized particles
D. all of the above

[单项选择]The port State control officer may ensure that（）are exhibited in conspicuous places throughout the ship.
A. survey planning document
B. muster lists
C. bulk carrier booklet
D. bulk carrier loading triangle

[单项选择]A warp end may be fitted for operating the derrick topping wire which adjusts the derrick （）.
A. length
B. slack
C. height
D. rotation direction

[单项选择]（） may be fitted for operating the derrick topping lift (the wire which adjusts the derrick height).
A. A capstan
B. A hold
C. A warp end
D. A mooring drum

[单项选择]Control valves of a CO₂ system may be located within the protected space when（）.
A. it is impractical to locate them outside
B. there is also a control valve outside
C. the CO₂ cylinders are also in the space
D. an automatic heat-sensing trip is installed

[单项选择]The control mode in which the final control element is moved from one of two flexed positions to the other is known as （）.
A. dead band action
B. neutral zone action
C. range
D. on-off action

[单项选择] You are developing a Web control. The Web control captures user address information in a Web application. You create a class named AddressControl that inherits from CompositeControl. This control consists of child controls.You need to ensure that the child controls are properly output to the browser.Developers using your control must be able to set the appropriate text for labels. In addition, they must be able to pull user address information from the associated text boxes during postback. What should you do?（）
A. Override the EnsureChildControls method of the base class. Add the child controls to the base container.
B. Override the CreateControlCollection method of the base class. Add the child controls to the ControlCollection class
C. Override the CreateChildControls method of the base class. Add the child controls to the base container.
D. Override the DataBindChildren method of the base class. Add the child controls to the ControlCollection class.

[单项选择]You develop a Web control. The Web control consists of labels and associated text boxes.You need to ensure that the Web control has both toolbox and visual designer support. What should you do?（）
A. Add a Web Control Library project to your solution. Define a class that inherits from CompositeControl.
B. Add a Windows Control Library project to your solution. Define a class that inherits from UserControl.
C. Add a Web User Control to your project. Define a class that inherits from UserControl.
D. Add a Mobile Web User Control to your project. Define a class that inherits from MobileUserControl.

[单项选择]（） control system is one in which the control action is independent of the output.
A. Feed back
B. Negative feed back
C. Close loop
D. Open loop

[单项选择]An electrically driven automatically operating auxiliary blower is provided for slow speed and （） of a low speed diesel engine.
A. manoeuvring operations
B. bad combustion
C. cooling
D. mooring trial

[单项选择]Although the crankshafts of medium diesel engines appear to be robust, they rely on the support of （） to develop their full strength.
A. the piston rods
B. the crank throws
C. the thrust bearings
D. the main bearings

[单项选择]The main operating characteristic of diesel engines which distinguishes them from other internal combustion engines is the （）
A. method of supplying air
B. cooling system
C. method of igniting fuel
D. valve operating mechanism