Air reservoirs are designed, built and...

单项选择题Air reservoirs are designed, built and tested similarly to （）.

A.boiler drums
B.hot wells
C.condensers
D.evaporators

您可能感兴趣的试卷

你可能感兴趣的试题

1.单项选择题The air reservoirs must have （） fitted to prevent rupture in the event of fire.

A.high pressure alarm
B.fire alarm
C.extinguishers
D.fusible plugs

2.单项选择题Before liquid can flow into a pump, the air in the suction line must be （） sufficiently to cause the liquid to flow into the suction chamber.

A.filled
B.evacuated
C.compressed
D.charged

点击查看答案

3.单项选择题Generally speaking, suction heads require to be （） for high speed or large capacities than for low speed or small capacities.

A.greater
B.smaller
C.better
D.worse

点击查看答案

4.单项选择题Some of the energy fed into the pump will be dissipated as （） due to mechanical inefficiencies, the remainder will be converted into pressure rise and fluid velocity.

A.hydraulic head
B.static head
C.heat energy
D.steam

点击查看答案

5.单项选择题Every liquid has a pressure at which it will vaporize and this pressure varies with temperatureThe word “which” means （）.

A.a liquid
B.a pressure
C.a temperature
D.none of the above

点击查看答案

6.单项选择题A simple pumping system consists of a suction branch, a pump and （）.

A.a priming device
B.a discharge branch
C.a filter
D.a suction valve

点击查看答案

7.单项选择题A(n) （） is a device which adds to the energy of a liquid or gas causing an increase in its pressure and a movement of the fluid.

A.pump
B.engine
C.turbine
D.boiler

点击查看答案

8.单项选择题Lubricating oil systems are fitted with a wide variety of strainers some of which can be cleaned in site while others have replaceable cartridgesThe bold and italic word “which” means （）.

A.lubricating oil
B.lubricating oil systems
C.strainers
D.cartridges

点击查看答案

9.单项选择题In many installations basket strainers consist of a cylindrical container in which a perforated metal or wire basket is suspendedThe bold and italic word “which” means （）.

A.installations
B.basket strainers
C.a cylindrical container
D.a metal or wire basket

点击查看答案

10.单项选择题Strainers, sometimes called （）, are devices designed to prevent the passage of unwanted solids into or further along a system.

A.dampers
B.filters
C.stopper circuits
D.separators

点击查看答案