问题：
[单选] In a simple mechanical governor, the （）.
centrifugal force rotates the ball-head。flyweight centrifugal force is balanced by spring force。flyweight centrifugal force is balanced by hydraulic pressure。speeder spring alone actuates the fuel control rod。
问题：
[单选] If the water level dropped rapidly in the expansion tank of a closed diesel engine cooling water system, you should suspect a （）.
loss of suction in the circulating pump。leak in the primary cooling system。broken raw water pump shaft。burned or cracked piston in one cylinder。
问题：
[单选] A diesel engine piston ring face is in direct contact with the （）.
top of the ring groove。cylinder liner oil film。bottom of the ring groove。back of the ring groove。
问题：
[单选] A diesel engine is operating with excessively high exhaust temperatures at all cylindersTo correct this condition, you should FIRST （）.
reduce the engine load。increase the cooling water flow。increase the lube oil pressure。adjust the fuel rack。
问题：
[单选] Routine monitoring of a diesel engine should include （）.
checking for leaks。checking temperatures and pressures。listening for abnormal noises。all of the above。
问题：
[单选] If a diesel engine is difficult to start and operates with the engine temperatures lower than normal, you should suspect that the （）.
compression pressures are below normal。lube oil is diluted with fuel oil。cranking speed is too low。exhaust system is partially restricted。
问题：
[单选] When would the available energy of the exhaust gases of a two-stroke/cycle diesel engine be insufficient to drive an exhaust gas turbocharger, resulting in the incorrect amount of air for combustion?（）
During operation at low speed。During operation at rated speed, but low power output。During acceleration。All of the above。
问题：
[单选] Electrically operated safety devices on auxiliary diesel engines function to stop the engine by （）.
increasing the volume of intake air。shutting off the fuel supply。increasing the engine back pressure。over-speeding the engine。
问题：
[单选] White smoke exhausting from an operating diesel engine may indicate （）.
a cracked liner。burning lube oil。an overloaded engine。insufficient combustion air。
问题：
[单选] If the main engine of an unattended engine room shuts down automatically, it will be indicated by an alarm （）.
at each control station。in the chief engineer’s quarters。in the captains quarters。All of the above are correct。
