The expansion valve used in a refrigeration system regulates the

A．superheat of the gas leaving the compressor

B．back pressure in the evaporator

C．temperature in the refrigerated space

D．degree of superheat of the gas leaving the evaporator

[单选题]A． thermostatic expansion valve is properly controlling evaporator superheat. Adjusting this valve to lower the superheat will result in a/anA．evaporator pressure decreaseB．evaporator coil over-feedC．evaporator capacity increaseD．expansion valve diap

[单选题]Expansion tank should be used to remove （） from cooling water.A . scaleB . sludgeC . chemicalsD . air

[单选题]The needle valve in a fuel valve will （） when the fuel pressure action on the needle valve tapered face exerts a force lower than that of the spring compression.A . be jammedB . be openedC . be seatedD . be broke

[单选题]A company is planning a $50 million expansion. The expansion is to be finan

[单选题]When replacing a thermostatic expansion valve sensing bulb, it is necessary toA．apply a light film of oil to increase heat transferB．apply a light film of oil to prevent oxidationC．apply a heavy coating of grease to function as a heat sinkD．carefully

[单选题]_____ allows for expansion and water make up in the water cooling system.A．A top tankB．A head tankC．A head valveD．A drain tank

[单选题]A．llowances may be made for the expansion and contraction in piping by the use of expansion joints or ().A．UnionsB．Retractable flangesC．Union bulkhead fittingsD．Bends or loops in the line

[名词解释] 扩张路径（Expansion path）

[单选题]The needle valve in the injector （） at a pre-set pressure which ensures that the fuel will atomize once it enters the cylinder.A . will liftB . will be liftedC . will closeD . will be closed

[单选题]（） allows for expansion and water make up in the water cooling system.A . A top tankB . A head tankC . A head valveD . A drain tank