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輪機(jī)英語船舶輔助機(jī)械章節(jié)練習(xí)(2018.01.03)

單項選擇題
When the temperature of the refrigerant flowing out from the condenser is below the condensing temperature, it is said to be （）.
A.dry
B.wet
C.super-cooled
D.superheated
單項選擇題
If an air compressor is used to supply air primarily to the combustion control system and other pneumatic controllers, the entire system is known as the （）.
A.control air system
B.forced draft air system
C.supply air system
D.ships service air system
單項選擇題
Distilled water from an evaporator may be discharged into a potable water tank （）.
A.through a detachable hose connection
B.after passing through an activated charcoal filter
C.after chemical analysis shows it is fit for consumption
D.through a solenoid operated three-way valve
單項選擇題
In motor ship, （） is often used to recover some of the heat carried in the exhaust gases from the main engine.
A.an diesel oil heater
B.a waste heat boiler
C.a fresh water generator
D.all the above
單項選擇題
In the process of （）, liquid changes into gas.
A.evaporation
B.frosting
C.condensing
D.compressing
單項選擇題
The internal force of a material, which tends to resist deformation when subjected to external forces, is known as （）.
A.stress
B.strain
C.shear strength
D.ultimate tensile strength
單項選擇題
An air compressor can be unloaded at start-up by （）.
A.holding the discharge valve open
B.relieving the intercooler pressure to the atmosphere
C.using an enlarged, permanently opened clearance expansion space
D.a pre-charged accumulator
單項選擇題
Which of the following terms could be applied to the simple definition the energy of motion?（）
A.Electrical energy
B.Thermal energy
C.Potential energy
D.Kinetic energy
單項選擇題
The drive motor will have a brake arranged to fail-safe, ieit will （） the load if power fails or machine is stopped.
A.lift
B.put
C.take
D.hold
單項選擇題
Which of the listed components is considered to separate the high pressure side of a refrigeration cycle from the low pressure side of the cycle?（）
A.The condenser and the expansion valve
B.The king valve and the solenoid valve
C.The compressor and the expansion valve
D.The condenser and the solenoid valve