Instrumentation Technology For Energy Systems

2.

In a measurement, what is the term used to specify the closeness of two or more measurements?

Accuracy
Precision
Threshold
Fidelity

Correct Answer

A. Precision

Explanation

Precision is the term used to specify the closeness of two or more measurements in a measurement. It refers to the level of detail and consistency in the measurements. A high level of precision indicates that the measurements are very close to each other, while a low level of precision indicates that the measurements are more spread out. Accuracy, on the other hand, refers to the closeness of a measurement to the true or target value, whereas threshold and fidelity are unrelated to the closeness of measurements.

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3.

Which of the following temperature sensors is not used for a temperature measurement?

Non-electrical type
Electrical type
Magnetic type
Radiation type

Correct Answer

A. Magnetic type

Explanation

Magnetic type temperature sensors are not commonly used for temperature measurement. They rely on the principle of magnetic properties changing with temperature, but they are not as accurate or widely used as other types of temperature sensors such as non-electrical, electrical, or radiation type sensors. Magnetic type sensors are more commonly used for other applications such as detecting magnetic fields or proximity sensing.

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4.

Which of the following devices is not used for pressure measurement?

Diaphragm gauge
Pressure bellows
Strain gauge
Dynamometer

Correct Answer

A. Dynamometer

Explanation

A dynamometer is not used for pressure measurement. A dynamometer is a device used to measure force, torque, or power. It is commonly used in engineering and automotive applications to measure the power output of an engine or motor. In contrast, diaphragm gauges, pressure bellows, and strain gauges are all devices specifically designed for measuring pressure. Diaphragm gauges use a flexible diaphragm that deforms under pressure to measure the pressure applied. Pressure bellows also use a flexible element, typically a metal bellows, to measure pressure. Strain gauges measure pressure indirectly by detecting the strain or deformation caused by the pressure on a material.

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5.

Which of the following measures the pressure with change in electrical resistance?

Bourdon tube
Pressure bellows
Strain gauge
Diaphragm gauge

Correct Answer

A. Strain gauge

Explanation

A strain gauge measures pressure by detecting the change in electrical resistance. When pressure is applied to the strain gauge, it causes a deformation or strain in the material, which in turn alters the electrical resistance. This change in resistance can be measured and correlated to the applied pressure. Therefore, the strain gauge is used to indirectly measure pressure by monitoring the electrical resistance changes.

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6.

If the two metals have different temperature coefficient then, they are useful in making _________

Manometric thermometer
Gas thermometer
Bimetallic thermometer
Digital thermometer

Correct Answer

A. Bimetallic thermometer

Explanation

A bimetallic thermometer is made by bonding two metals with different temperature coefficients of expansion together. When the temperature changes, the two metals expand or contract at different rates, causing the bonded strip to bend. This bending is then converted into a temperature reading. Therefore, if two metals have different temperature coefficients, they can be used effectively in making a bimetallic thermometer.

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7.

In _____________ velocity of fluid is constant on every point at a specific time.

Steady flow
Rotational flow
Non steady flow
None of the mentioned

Correct Answer

A. Steady flow

Explanation

In steady flow, the velocity of the fluid remains constant at every point at a specific time. This means that the fluid particles move in a uniform and continuous manner, without any changes in velocity or direction. In other words, there is no acceleration or deceleration of the fluid particles in steady flow. This type of flow is commonly observed in pipes or channels where the fluid is flowing smoothly and steadily without any disturbances or fluctuations.

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8.

Which of the following represents obstruction type flow measuring systems?

Centrifugal force type
Rotating vane system
Flow nozzle device
None of the mentioned

Correct Answer

A. Flow nozzle device

Explanation

A flow nozzle device represents an obstruction type flow measuring system. It is designed to create a pressure drop in the fluid flow, which can then be used to calculate the flow rate. The flow nozzle has a converging section, a throat, and a diverging section. As the fluid passes through the nozzle, its velocity increases in the converging section, reaches its maximum at the throat, and then decreases in the diverging section. This change in velocity causes a pressure drop, which can be measured and used to determine the flow rate.

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9.

Mechanical transducers sense __________

Electrical changes
Physical Changes
Chemical changes
Biological changes

Correct Answer

A. Physical Changes

Explanation

Mechanical transducers are devices that convert mechanical energy into another form of energy, such as electrical or thermal energy. They are designed to sense and measure physical changes in their environment, such as changes in pressure, force, or displacement. This means that they can detect and respond to physical changes in their surroundings, making the answer "Physical Changes" the correct one.

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10.

The power needs of electrical transducers is ________

Maximum
Minimum
Zero
Infinite

Correct Answer

A. Minimum

Explanation

The power needs of electrical transducers are minimum. This means that electrical transducers require the least amount of power to function properly.

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Instrumentation Technology For Energy Systems

In a measuring system quantity under measurement is termed as

Quiz Preview

In a measurement, what is the term used to specify the closeness of two or more measurements?

Which of the following temperature sensors is not used for a temperature measurement?

Which of the following devices is not used for pressure measurement?

Which of the following measures the pressure with change in electrical resistance?

If the two metals have different temperature coefficient then, they are useful in making _________

In _____________ velocity of fluid is constant on every point at a specific time.

Which of the following represents obstruction type flow measuring systems?

Mechanical transducers sense __________

The power needs of electrical transducers is ________