Question

An instrument used to measure _______ is a pressure gauge.
(A). Pressure
(B). Heat
(C). Temperature
(D). None of these.

Answer 1

Hint: A measuring instrument is a device for measuring a physical quantity. There can be different types of measuring instruments, such as electrical instruments, electronics instruments, and mechanical instruments. Pressure gauge is a type of mechanical instrument. We will consider the given options to find the quantity which is measured using the help of a pressure gauge.

Complete step-by-step answer:
Pressure is described as the physical force exerted on an object. The force applied is perpendicular to the surface of the object's per unit area. The basic formula for pressure is Force per unit area. Unit of pressure is Pascals. Types of Pressures are Absolute pressure, Differential pressure, Atmospheric pressure, and Gauge Pressure.
Heat or heat energy is defined as the result of the movement of tiny particles such as atoms, molecules or ions in solids, liquids and gases. Heat is the energy in transfer to or from a thermodynamic system, by mechanisms other than thermodynamic work or transfer of matter.
Temperature is a physical quantity that expresses the state of being hot and cold. It is the manifestation of thermal energy, present in all matter, which is the source of the occurrence of the flow of heat energy, when a body is in contact with another that is colder. Temperature can be measured with the help of a thermometer.
Pressure measurement is the analysis of an applied force by a fluid, whether a liquid or a gas, on a surface. Pressure is basically measured in the units of force per unit of the surface. Instruments used to measure and display pressure in an integral unit are called pressure meters or pressure gauges or vacuum gauges.
Pressure gauge is an instrument used for measuring the condition of a fluid, liquid or gas, that is specified by the force that the fluid would exert, being at rest, on a unit area surface, such as pounds per square inch or newton per square centimeter.
The instrument used to measure pressure is the pressure gauge.
Hence, the correct option is A.

Note:Pressure can be measured in different ways, such as, absolute pressure, differential pressure, and gauge pressure. Absolute pressure is referenced to the pressure in vacuum while gauge and differential pressure are referenced to another pressure, such as, the pressure in an adjacent vessel.