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Before starting any diesel or gasoline engine, which of the following must be checked?____.
A.Oil level
B.Flow of cooling water
C.Exhaust discharge
D.All of the above
参考答案
更多 “ Before starting any diesel or gasoline engine, which of the following must be checked?____.A.Oil levelB.Flow of cooling waterC.Exhaust dischargeD.All of the above ” 相关考题
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Diesel engine electric starting motors generally require heavier duty motors and motors and operate at higher voltages than comparable starting motors for gasoline engines due to _____________.A.higher speed requiredB.flywheel-effectC.lower starting temperaturesD.higher compression pressures
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Which of the following reasons represents why the designed compression ratio of a gasoline engine is lower than that of a diesel engine?A.compression must be low for effective spark ignitionB.compression must be low for required horsepower and torque generationC.compression must be low to prevent pre-ignitionD.compression must be low to have effective pre-ignition
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Before engaging the turning gear and turning the diesel engine, which of the following operation should be done except______.A.open the indicator cocksB.supply some CYL.Oil to cylinder liner wall with lubricator (only for two stoke diesel engine)C.put the fuel handle in the "stop" positionD.pump up the air bottle
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In an operating diesel engine, which of the following conditions is an indication of a leaking air starting valve?A.Noise coming from that air starting valveB.Continuous operation of the starting air compressorC.Zero air pressure in the air starting systemD.Overheated starting air pipe to the cylinder head
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Before starting a gasoline engine on a motorboat，you should make sure for safety that ______．A.The gasoline tank is fullB.The bilges，cabins，etc．are thoroughly ventilatedC.You have fresh water on boardD.Each of the above is followed
考题
单选题Before starting a diesel engine, you should always（）A
check the pyrometer readingsB
check the crankcase oil levelC
check the fuel oil strainersD
clean the fuel system
考题
单选题Before starting a gasoline engine on a motorboat，you should make sure for safety that（）.A
the gasoline tank is fullB
the bilges，cabins，etc. are thoroughly ventilatedC
you have fresh water on boardD
Each of the above is followed
考题
单选题Before starting a diesel engine that has an engine driven lube oil pump, the engineer should （）.A
open the bypass lineB
cut in the lube oil coolerC
pressurize the lube oil systemD
top off the expansion tank
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单选题Which of the following methods is used to prevent throttling of compressed air through the diesel engine air starting valves?（）A
Holding the valve open for a long periodB
Increasing the starting air pressure usedC
Opening the stating air valve quicklyD
Reducing the starting air valve size
考题
单选题Which of the listed diesel engine operating conditions should be checked immediately after any diesel engine is started?（）A
Exhaust temperatureB
Lube oil levelC
Lube oil pressureD
Water level in the expansion tank
考题
单选题Diesel engine electric starting motors generally require heavier duty motors and motors and operate at higher voltages than comparable starting motors for gasoline engines due to（）A
higher speed requiredB
flywheel-effectC
lower starting temperaturesD
higher compression pressures
考题
单选题As soon as a diesel engine has started, which of the listed engine operating parameters should be checked FIRST?（）A
Exhaust temperaturesB
Raw water pressureC
Lube oil pressureD
Air box pressure
考题
单选题Before starting any diesel or gasoline engine，which of the following must be checked? （）A
Oil levelB
Flow of cooling waterC
Exhaust dischargeD
All of the above
考题
单选题Which one of the followings may not be checked before engine starting?（）A
tank levelB
Various filtersC
DrainsD
seawater temperature
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单选题The following preparations are essential for any （） of marine diesel engine before it may be started.A
doingB
makeC
turnD
operating
考题
单选题During maneuvering operations for a direct reversing large, low-speed, main propulsion diesel engine, which of the following actions is used to stop the shaft from turning prior to reversing the engine rotation?（）A
Flywheel inertiaB
Admission of starting airC
The way of the vesselD
securing of fuel to the cylinders
考题
单选题The is employed to warm up a large diesel engine before its starting（）A
hot airB
hot boiler waterC
cylinder waterD
hot seawater
考题
单选题A large two-stroke/cycle direct reversing diesel engine is to be reversedPrior to the admission of starting air you must （）A
line up the engine fore restarting with light diesel oilB
reposition the fuel injection camC
change the intake and exhaust valve cam positionsD
place the starting cam in the intermediate position
考题
单选题Which of the following reasons represents why the designed compression ratio of a gasoline engine is lower than that of a diesel engine?（）A
compression must be low for effective spark ignitionB
compression must be low for required horsepower and torque generationC
compression must be low to prevent pre-ignitionD
compression must be low to have effective pre-ignition
考题
单选题Which of the following should always be checked prior to starting a diesel engine?（）A
Air filtersB
Fuel oil strainersC
Crank case oil levelD
Pyrometer readings
考题
单选题According to the relevant regulation, lifeboat should be powered by（）.A
inboard diesel engineB
outboard diesel engineC
outboard gasoline engineD
inboard gasoline engine
考题
单选题Which of the following precautions must be taken if an electric immersion heater is used to keep the coolant in a diesel engine warm during the time the engine is secured?（）A
The coolant temperature must be maintained at 180℃B
The thermostatic bypass valves must be manually opened before the engine is startedC
The pressure cap must be removed while the engine is securedD
Electrical power to the heater must be secured before the cooling system is drained
考题
单选题When the diesel is stopped, which of the following items is wrong?（）A
keep all systems in normally runningB
the main engine is stand-byC
shut off the starting air bottle outlet valveD
pay attention to the changes of the system parameters
考题
单选题In an operating diesel engine, which of the following condition is an indication of a leaking air starting valve?（）A
noise coming from that air starting valveB
continuous operation of the starting air compressorC
zero air pressure in the air starting systemD
overheated starting air pipe to the cylinder head
考题
单选题Before engaging the turning gear and turning the diesel engine, which of the following operation should be done except（）A
open the indicator cocksB
supply some CYL Oil to cylinder liner wall with lubricator (only for two stoke diesel engine)C
put the fuel handle in the “stop” positionD
pump up the air bottle
考题
单选题When running a large, low-speed, main propulsion diesel engine on heavy fuel, which of the following precautions should be observed when switching back over to diesel oil?（）A
The diesel oil must never be allowed to mix with the heavy fuelB
The temperature of the fuel from the pre–heater should be gradually reduced after switching over the three–way valveC
The heating steam to the pre-heater should be secured as soon as the diesel fuel passes through the three-way valveD
The heating steam must be secured before the diesel oil passes through the three-way valve
考题
单选题The diesel engine must be started before it can run by it self For this purpose （） has to be used.A
a starting systemB
the starting airC
a starting operationD
A, B and C
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