超星 - 题库第三章 - 查题吧

单选题

Automobile engine water pump are of many designs, but most are the ______ type.

A. line
B. centrifugal
C. V
D. W

单选题

The radiator is constructed to hold a large amount of water in tubes which provided a large area in contact with the______.

A. atmosphere
B. coolant
C. oil
D. fan

单选题

The radiator cap is designed to seal ______ so that it operates under some pressure.

A. the lubricating system
B. the cooling system
C. the ignition system
D. the fuel system

单选题

The thermostat is designed to close off the flow of water from engine to_____ until the engine has reached the desired operating temperature.

A. fan
B. radiator
C. intake manifold
D. water pump

单选题

It is necessary to use a nonfreezing solution in the _____of water-cooled engines.

A. ignition system
B. fuel system
C. lubricating system
D. cooling system

单选题

Forced air circulation is provided by a fan of generous capacity which is driven from the engine _____ by a belt or by fan blade formed in the flywheel.

A. camshaft
B. rocker arm
C. crankshaft
D. connecting rod

单选题

It is necessary to use a nonfreezing solution in the cooling system of _____ engines.

A. air-cooled
B. water-cooled
C. gasoline
D. diesel

单选题

We cannot eliminate internal friction, but we can reduce it to a controllable degree by the use of ______.

A. coolant
B. antifreeze
C. lubrications
D. acid

单选题

By______ , reduce friction between moving parts of engine.

A. lubrications
B. antifreeze
C. coolant
D. acid

单选题

By______ , prevent leakage between parts such as pistons, rings and cylinders.

A. antifreeze
B. water
C. coolant
D. lubrications

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