A single fitting installed in a pipeline that either blanks off the pipe or allows a full flow passage of a liquid through the pipe is referred to as a（）.
The vertical movement of a vessel in the water is called（）.
What will NOT increase friction of a liquid flowing in a pipe and cause a loss of suction head?（）.
Movement of the pump control rack in a fuel injection system using individual plunger-type pumps （）
The ports are drilled in the liners at an angle of approx 20℃ the result being that （） is given a rotary movement.
Which of the following influences the position of the interface between the liquid seal and the oil in a purifier?（）
A sight glass is installed in the liquid line to indicate the condition of the refrigerant charge and may also indicate the （）.
The presence of bubbles in a refrigeration system liquid line may （）.
The lowest temperature at which a liquid gives off enough vapor to ignite in the presence of an ignition source is called its （）.
A petroleum liquid has a flashpoint of 85℃.This liquid is in IMDG Code classed as a（）.
A change in engine speed is required before a governor is able to make a corrective movement of fuel rackThis aspect of governing is commonly expressed as a percent and is known as （）
Which of the problems listed could be indicated if a sight glass in the refrigerant liquid line is full of bubbles?（）
In a compression refrigeration cycle, the temperature of the liquid refrigerant experiences its greatest decrease in the（）.
A condenser is a vessel in which（） is deprived of its latent heat of vaporization and so changed to its liquid state.
If a liquid sight flow indicator in a refrigeration system shows gas bubbles in motion passing inside of the glass, there is （）.
The required amount in the change of speed necessary before a governor will make a corrective movement is known as （）.
A pressure drop in the liquid line of a refrigeration system may cause（）
Pound was the leader of a now movement in poetry which he called the "（）" movement.
A Passage to India is set against the background of the independence movement in Africa.
Six degrees of freedom refers to the freedom of movement of a rigid body in two-dimensional space.
In general code, each movement of the hands______ a word in English.
The ports are drilled in the liners at an angle of approx20℃ the result being that _____ is given a rotary movement.
The Chartist Movement finally succeeded and it constituted a glorious page in the history of the workers’ struggle for libera.（）
Which of the following would lead to an increase in the vapor pressure of a liquid I. Increasing the temperature II. Adding a nonvolatile
