The correct answer is: D. both pipe diameter as well as throat diameter.
A venturimeter is a device used to measure the flow rate of a fluid. It consists of a converging section, a throat, and a diverging section. The fluid enters the converging section and is accelerated, causing the pressure to decrease. The fluid then passes through the throat, where the pressure is at its lowest. The fluid then enters the diverging section and decelerates, causing the pressure to increase. The pressure difference between the inlet and outlet of the venturimeter is proportional to the square of the flow rate.
The size of a venturimeter is specified by the pipe diameter and the throat diameter. The pipe diameter is the diameter of the inlet and outlet of the venturimeter. The throat diameter is the diameter of the narrowest section of the venturimeter. The size of the venturimeter affects the accuracy of the flow rate measurement. A larger venturimeter will be more accurate than a smaller venturimeter.
The angle of diverging section does not affect the size of the venturimeter. The angle of diverging section is the angle between the walls of the diverging section. The angle of diverging section affects the pressure recovery of the venturimeter. A larger angle of diverging section will result in a higher pressure recovery.
The following is a brief explanation of each option:
- Option A: pipe diameter. The pipe diameter is the diameter of the inlet and outlet of the venturimeter. The pipe diameter affects the accuracy of the flow rate measurement. A larger venturimeter will be more accurate than a smaller venturimeter.
- Option B: throat diameter. The throat diameter is the diameter of the narrowest section of the venturimeter. The throat diameter affects the accuracy of the flow rate measurement. A larger venturimeter will be more accurate than a smaller venturimeter.
- Option C: angle of diverging section. The angle of diverging section is the angle between the walls of the diverging section. The angle of diverging section affects the pressure recovery of the venturimeter. A larger angle of diverging section will result in a higher pressure recovery.
- Option D: both pipe diameter as well as throat diameter. The size of a venturimeter is specified by the pipe diameter and the throat diameter. The pipe diameter is the diameter of the inlet and outlet of the venturimeter. The throat diameter is the diameter of the narrowest section of the venturimeter. The size of the venturimeter affects the accuracy of the flow rate measurement. A larger venturimeter will be more accurate than a smaller venturimeter.