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The color of the exhaust from a diesel engine should be （）
A . clear
B . hazy light brown
C . hazy light blue
D . hazy light grey
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White smoke exhausting from a diesel engine can be caused by （）
A . low combustion temperature
B . a leaking fuel nozzle check valve
C . late fuel injection
D . plugged oil-scraper ring hole
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An exhaust gas bypass is installed on a waste heat boiler in order to （）.
A . bypass exhaust gas at high loads to prevent excessive back pressure
B . bypass a portion of the exhaust gas at peak loads for better efficiency
C . recycle exhaust gas to the turbocharger
D . minimize moisture condensation in the boiler gas passages at low load
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A patient suffering from heat exhaustion should be（）.
A . moved to a cool room and told to lie down
B . kept standing and encouraged to walk slowly and continuously
C . given a glass of water and told to return to work after 15 minutes of rest
D . None of the above are correct
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High firing pressures and a low exhaust temperature in a diesel engine may result from （）.
A . decreased piston to cylinder head clearance
B . increased exhaust system back pressure
C . early fuel injection timing
D . low scavenge air temperature
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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 combustio
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If you observe smoke coming from the turbocharger of an auxiliary diesel engine, you should（）
A . check the air filter for obstruction
B . check for an exhaust leak
C . check the exhaust temperature
D . secure the engine
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White smoke exhausting from an operating diesel engine may indicate （）.
A . a cracked liner
B . burning lube oil
C . an overloaded engine
D . insufficient combustion air
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A dark exhaust from a running diesel engine can be caused by （）
A . late ignition
B . water in the fuel
C . high compression temperature
D . starting valve stuck ope
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Exhaust gases are generally removed from the cylinders of a two-stroke/cycle diesel engine by（）
A . natural aspiration
B . masked intake valves
C . air cells
D . scavenging air
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（）is a caing used for exhaust pipe from the engines.
A . The funnel
B . The messroom
C . The galley
D . The satellite antenna
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An attacker is launching a DoS attack on the Company network using a hacking tool designed to exhaust the IP address space available from the DHCP servers for a period of time. Which procedure would best defend against this type of attack？ （）
A . Configure only trusted interfaces with root guard.
B . Implement private VLANs （PVLANs） to carry only user traffic.
C . Implement private VLANs （PVLANs） to carry only DHCP traffic.
D . Configure only untrusted interfaces with root guard.
E . Configure DHCP spoofing on all ports that connect untrusted clients.
F . Configure DHCP snooping only on ports that connect trusted DHCP servers.
G . None of the other alternatives apply
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High exhaust temperatures from all of cylinder of a turbocharged, four-stroke/cycle diesel engine can be caused by an（）
A . inoperative turbocharger
B . inadequate fuel supply
C . overload on one cylinder
D . unequal load distributio
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Black smoke exhausting from an operating diesel engine is an indication of poor combustion which may be caused by （）
A . water in the fuel
B . insufficient fuel for combustion
C . clogged air intake passages
D . burning lubricating oil
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You notice smoke coming from an open laundry room doorway．After activating the fire alarm，which of the following would you do FIRST（）.
A . Attempt to determine what is burning
B . Acquire the nearest self contained breathing apparatus
C . Break out the nearest fire hose
D . Wait for the fire team to arrive and assist as directed
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A dry-type spark arrestor removes sparks from a diesel engine exhaust by（）
A . increasing the linear velocity of the exhaust gases
B . changing directions of exhaust gas flow
C . decreasing the temperature of the exhaust gases
D . accelerating the exhaust gas through a reduced size orifice
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Black smoke exhausting from a diesel engine indicates（）
A . proper fuel injection
B . water in the fuel
C . incomplete combustion
D . burning of lube oil
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A smoking burner with a pulsating flame in auxiliary boiler, is an indication that the（）
A . fuel oil supply temperature is normal
B . burner electrode is incorrectly positioned
C . fuel／air ratio is incorrect
D . ignition current is too low
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Black smoke exhausting from an operating diesel engine can be caused by （）
A . fuel dribbling from leaking fuel injectors
B . burning fuel with a high carbon content
C . burning fuel with a high vanadium content
D . burning fuel with a lower sulphur content
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A diesel engine emits blue exhaust smoke as a result of（）
A . cold intake air
B . excessive compression pressure
C . excessive cylinder lubrication
D . a light load
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A four-stroke cycle, turbocharged, 1000 horsepower diesel engine has been operating under loadThe load suddenly increases, causing excessive black exhaust smoke, and a rapid rise in the lube oil temperatureIn response to this condition, you should:（）
A . reduce load
B . check your exhaust
C . adjust cooling water temperature
D . increase lube oil flow
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In comparing engines of equal horsepower, higher exhaust gas temperatures occur in a/an（）
A . opposed-piston engine
B . double-acting engine
C . two-stroke/cycle engine
D . four-stroke/cycle engine
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During a training exercise a submarine indicating that a torpedo has been fired will send up smoke from a float. The smoke’s color will be（）.
A . black
B . red
C . orange
D . yellow
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A diesel engine experiences a sudden loss in speed, accompanied by black exhaust smoke, with the fuel rack at maximum, and speed remaining below normal the probable（）
A . engine overload
B . leaky valves
C . stuck or broken piston rings
D . low air injection pressure
