Png Domestic Plumbing Quiz

OPSO (Over Pressure Shut Off) and UPSO (Under Pressure Shut Off) are indeed safety devices that are commonly attached to regulators. These devices are designed to ensure the safe operation of the regulator by shutting off the flow of gas in case of an overpressure or underpressure situation. This helps prevent any potential accidents or damage that may occur due to excessive pressure. Therefore, the statement is true.

PTFE stands for polytetrafluoroethylene. It is a synthetic fluoropolymer of tetrafluoroethylene and is commonly known by its brand name Teflon. The correct answer is "Poly tetra fluoro ethelyne", which accurately represents the full name of PTFE.

BSPT stands for British Standard Pipe Taper and it is a type of thread commonly used in domestic plumbing. It has a tapered design which allows for a tight seal and prevents leaks. This type of thread is widely used in the United Kingdom and other countries that follow British plumbing standards. BSP and NPT are also types of threads used in plumbing, but they are not as commonly used in domestic applications. Therefore, the correct answer is BSPT.

The correct answer is 2.5 Cubic Meter Per Hour. This is the maximum flow rate of a G-1.6 Domestic meter, which means that it can measure and handle a flow rate of up to 2.5 cubic meters of gas per hour.

The correct answer is C CLASS. In domestic G.I. connections, the pipe class refers to the thickness of the pipe. The C class pipe has a medium thickness, making it suitable for domestic applications where the water pressure is not too high. A class and B class pipes have thicker walls and are typically used for industrial or commercial purposes. Therefore, the C class pipe is the appropriate choice for domestic G.I. connections.

Ball valve installation in fall to open direction is false. Ball valves are designed to be installed with the flow direction indicated by an arrow on the valve body. The arrow indicates the direction in which the ball should be rotated to open or close the valve. Installing the ball valve in the opposite direction can cause leakage and improper functioning of the valve. Therefore, it is important to follow the correct installation instructions to ensure proper operation of the ball valve.

The correct answer is 35 Milli Bar. The CRV (creep relief valve) of the Domestic Regulator B-1.6 allows gas to pass when the pressure reaches 35 Milli Bar.

When the upstream pressure decreases from the permissible limit, UPSO shuts off the flow from the regulator. This means that if the pressure in the upstream system drops below the acceptable range, UPSO will stop the flow to prevent any further decrease in pressure.

The unit for measuring natural gas is the Standard Cubic Meter (SCM). This unit is commonly used in the industry to measure the volume of natural gas at standard conditions of temperature and pressure. It is important to use standard units to ensure accurate and consistent measurements of natural gas. The other options, such as cubic meter and cubic meter per hour, may also be used in certain contexts, but SCM is the most commonly accepted unit for natural gas measurement.

A plug gauge is used to check the thread of G.I. fittings. It is a cylindrical gauge with a threaded end that is inserted into the fitting to check if the threads match. This gauge is specifically designed to measure the internal thread of the fitting, ensuring that it is the correct size and pitch. The other options, such as a micrometer screw gauge, vernier caliper, and ring gauge, are not suitable for checking the thread of G.I. fittings.