Flow Measurement MCQ Quiz With Answers

The unit of measurement commonly associated with flow rate is gallons per minute. This unit is used to measure the volume of a fluid flowing through a system in a given amount of time. It is commonly used in industries such as plumbing, irrigation, and fluid dynamics to quantify the rate at which a liquid or gas is flowing.

Flow rate is the best term to describe the amount of fluid that is passing through a point at any given time. It refers to the volume or mass of fluid that is moving per unit of time. Flow rate can be measured in various units such as liters per second or cubic meters per hour. It is an important parameter in fluid dynamics and is used to quantify the rate at which fluid is flowing in a system.

The purpose of the orifice plate in this flow measuring arrangement is to create a differential pressure. The orifice plate is inserted into the flow of fluid, causing a restriction. This restriction creates a pressure drop across the plate, which can be measured and used to calculate the flow rate of the fluid. By creating a differential pressure, the orifice plate allows for accurate measurement of the flow rate in the system.

The correct answer is "The amount of fluid that's passing some point at any given time." This choice accurately describes the concept of flow rate, which is the measure of how much fluid is moving through a specific point in a given amount of time. It does not refer to the total amount of fluid that has passed a designated point or the amount of air needed for bubbles in a bubbler system, nor does it involve the ratio of a fluid's turbidity to its opacity.

The correct answer is D. Orifice plate. The D/P (differential pressure) cell in a flow measurement device relies on the differential pressure created by the orifice plate. The orifice plate creates a restriction in the flow path, causing a pressure drop across it. The D/P cell measures the difference in pressure before and after the orifice plate, which can be used to calculate the flow rate. Plummet, float, and rotor are not components typically used in creating the differential pressure for flow measurement.

A meter that indicates gallons per minute is most likely measuring the flow rate. Flow rate refers to the volume of fluid that passes through a particular point in a given amount of time. In this case, the meter is specifically measuring the rate at which gallons of fluid are flowing per minute.

The meter is most likely measuring the total amount of fluid that has passed a designated point. This means that it is measuring the cumulative volume or quantity of fluid that has flowed through the point, regardless of whether the flow is laminar or turbulent. The other options, such as laminar flow, turbulent flow, and flow rate, are specific characteristics or measurements related to the flow, but they do not encompass the overall total amount of fluid that has passed the point.

The nutating disc meter operates based on the principle of positive displacement. This means that the meter measures the flow of fluid by repeatedly filling and emptying a chamber, resulting in accurate and precise measurements. Positive displacement meters are commonly used in applications that require precise measurement of fluid flow, such as in the petroleum industry or in water distribution systems.

A turbine flow meter is used to determine the flow rate of a fluid by measuring its velocity. This type of meter consists of a turbine rotor that spins as the fluid passes through it. The rotational speed of the turbine is directly proportional to the velocity of the fluid, allowing for accurate flow rate measurement. Turbine flow meters are commonly used in various industries, including oil and gas, water treatment, and chemical processing, due to their reliability and wide range of applications.

When a weir is placed in an open channel, the fluid flow rate is determined by the level of the fluid. The level of the fluid in the channel determines the height of the weir, which in turn affects the flow rate. As the level of the fluid increases, the flow rate over the weir also increases. Therefore, the level of the fluid is a crucial factor in determining the fluid flow rate in this scenario.

Total flow is the term that best describes the amount of fluid that has passed a designated point. It refers to the cumulative amount of fluid that has flowed through a specific location over a given period of time. Flow rate, on the other hand, refers to the rate at which the fluid is flowing, while gallons per minute is a unit used to measure flow rate. Flow velocity, on the other hand, refers to the speed at which the fluid is flowing. Therefore, total flow is the most appropriate term to describe the amount of fluid that has passed a designated point.

A nutating disc meter traps fluid above and below the disc, which allows for accurate measurement. It operates on the principle of positive displacement, meaning that it measures fluid flow by trapping and displacing a fixed volume of fluid with each rotation of the disc. The presence of a plummet or turbine blades is not mentioned or applicable to a nutating disc meter.