Excessive circulation of the lubricating oil with the refrigerant in a refrigeration system will cause______.

A . compression pressure in the cylinder will be higher B . carbon will accumulate behind the ring C . combustion gases will penetrate beneath the ring land D . piston side thrust will be increased

A . the relief valve should open before the high pressure cutout B . the relief valve should open and allow the excess refrigerant to flow to the receiver C . the high pressure cutout switch should operate before the relief valve opens D . you should close in on the suction valve

A . caustic embrittlement of the boiler metal B . acidic corrosion of the boiler metal C . hard scale deposits on the boiler tubes D . etching of the heat exchange surface

A . Each vent for the tank must be equal to the area of the tank filling line B . The tanks must be protected by overflows C . The total area of the vents or the overflow shall be at least equal to the area of the fill line D . There must be twice as much vent area as the area of the fill line

A . bearing knocks B . dropping of pressure of LO C . noises D . all the above

A . all excessive amounts of growth will cause the main engines of the vessel to stall due to the inability to supply the proper quantities of fuel to satisfy the existing load B . The deposits produced by these growths form blockages and flow restrictions ultimately leading to improper atomization of the fuel into the cylinders C . Eventually the growth of these organisms will deplete the supply of food available to them, which in turn will cause their demise D . If continual growth is permitted, a sweet odor similar to that associated with baking will be noticed when system components are opened for inspectio

A . overheated compressor bearings B . excess lube oil viscosity C . carbon deposits on the compressor piston rings D . wax crystals forming in the lubricant

A . the rotate speed fluctuation B . the ventilation tube clogged C . the main engine accelerate so fast D . stormy wave

A . The pump delivers full capacity when started, but gradually slackens off toan abnormally low flow B . The pump packing gland overheats after short operating periods C . The motor over-current protective device continually shuts the pump down D . Pounding noises can be heard at the pump suction chest

A . low B . high C . warm front D . cold front

A . starting B . stopping C . to start D . to sto

A . dirty delivery ducts B . too much refrigerant C . the fouling filters D . high temperature outside

A . Expansion valve B . Condenser C . Evaporator D . Compressor

A . A large number of BGP sessions B . A large BGP table C . A router is configured with the following command： ip route 0.0.0.0 0.0.0.0 fa 0/1 D . All interface buffers are continually in use E . A flapping interface F . The router sends a large number of ARP request

A . compressor damage from improper lubrication B . refrigerant absorption by the lubricant C . increased viscosity in the lubricant D . carbon deposit on the compressor suction valve

A . humidity B . varying densities of water C . vessel traffic D . the jet stream

A . feel the high pressure fuel line B . check the cylinder exhausts for white smoke frequently C . check the cylinder exhaust temperature D . isolate each cylinder and inspect the injector

A . Leaking fuel injectors B . Lower than normal compression C . Delayed fuel injection D . All of the above are correct

A . air or water in the furnace B . combustion pulses C . fuel oil pump failure D . flame failure

A . boiler B . heater C . engine D . cooler

A．excessive expansion B．excessive shrinkage C．low impact strength D．excessive brittleness