更多"Which of the listed conditions can "的相关试题:
[单项选择]Which of the listed conditions can cause lacquer to be deposited on a piston skirt?（）
A. High sulphur content fuel
B. High lube oil temperatures
C. High vanadium content fuel
D. Excessive piston slap
[单项选择]Which of the conditions listed would cause simultaneous high cylinder firing pressure and low exhaust temperature?（）
A. Improper fuel rack positioning
B. Lengthy opening of the exhaust valve
C. Excessively early injection timing
D. Extended light load operation
[单项选择]Which of the conditions listed could cause the cylinder relief valves on a large, low-speed, propulsion diesel engine to lift?（）
A. Plugged injector nozzles
B. Excessive fuel injection
C. Very late injection timing
D. Incorrect crankshaft clearance
[单项选择]Which of the conditions listed will cause a refrigeration compressor to run constantly without simultaneously decreasing the temperature in the refrigerated space?（）
A. Shortage of refrigerant oil
B. Slight shortage of refrigerant
C. Excessive condenser cooling water flow
D. Faulty expansion valve
[单项选择]Which of the listed conditions will cause the feed water that has not flashed to vapor in the first-stage of a flash evaporator, to flow into the second-stage?（）
A. Gravity siphon effect
B. Higher vacuum in the second-stage
C. Difference in brine density between first and second stages
D. lower pressure in first-stage
[单项选择]Which of the conditions listed represents the greatest effect of excess frost accumulation on the evaporator coils?（）
A. Keeps the refrigerated space cooler
B. Reduces the efficiency of the plant
C. Takes the load off the compressor
D. Has no affect on the system
[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]Which of the listed conditions can lead to cavitation气穴in a centrifugal pump?（）
A. Vapor pockets formed in the suction flow stream
B. Rough easing volute surfaces
C. Worn wearing rings
D. Heavy fluid in the flow stream
[单项选择]Under which of the listed conditions can the engine room retake the throttle control from the bridge（）.
A. Any time it is deemed necessary
B. Only with the masters permission
C. After a 10 minute delay to the input command
D. Only after the throttle has been placed in stop
[单项选择]Which of the listed conditions can be considered as the single greatest cause of accidents?（）
A. Speed
B. Excessive knowledge or skill
C. Human error
D. Excitement
[单项选择]Which of the listed conditions can be used to determine if lube oil has been diluted by fuel? （）
A. Viscosity is decreased
B. Octane number is altered
C. Pump speed is decreased
D. Blower’s speed is decreased
[单项选择]One cause of diesel engine surging can be a result of （）
A. injection pump plungers stuck or worn
B. low compression
C. solenoid stuck open
D. fuel tank too full
[单项选择]Air in the fuel lines of a diesel engine can cause （）
A. ignition failure
B. oxygen corrosion of the fuel lines
C. the pistons to seize
D. blue smoke
[单项选择]Sudden unloading of a diesel engine can cause（）.
A. decreased fuel efficiency
B. increased exhaust temperature
C. black smoke
D. overspeed trip
[单项选择]Which cause of the following can lead to the engine not to start on air?（）
A. starting air pressure too high
B. correct timing of starting air valves
C. three of the starting valves stuck
D. the turning gear disengaged
[单项选择]Which protocol can cause overload on a CPU of a managed device?（）
A. Netflow
B. WCCP
C. IP SLA
D. SNMP
[单项选择]Clogged diesel engine fuel oil filters can cause（）
A. loss of power
B. misfiring
C. low fuel oil pressure
D. All of the above
[单项选择]Which of the listed conditions will affective pressure the most in the cylinder of a diesel engine?（）
A. TBN of the lubricating oil
B. Temperature of the lube oil
C. Completeness in the mixing of the fuel and air
D. Temperature of the cooling (sea) water
[单项选择]Which of the listed operating conditions would have the greatest effect on the volumetric efficiency of an operating reciprocating air compressor?（）
A. The density of the air entering the compressor
B. The temperature of the air entering the compressor
C. The designed rotating speed of the compressor
D. A leaking head gasket
