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Electronics and Communication Engineering (ECE) Exam  >  Electronics and Communication Engineering (ECE) Tests  >  Sensor & Industrial Instrumentation  >  Test: Measurement of Pressure, pH & Viscosity- 2 - Electronics and Communication Engineering (ECE) MCQ

Test: Measurement of Pressure, pH & Viscosity- 2 - Electronics and Communication Engineering (ECE) MCQ


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25 Questions MCQ Test Sensor & Industrial Instrumentation - Test: Measurement of Pressure, pH & Viscosity- 2

Test: Measurement of Pressure, pH & Viscosity- 2 for Electronics and Communication Engineering (ECE) 2024 is part of Sensor & Industrial Instrumentation preparation. The Test: Measurement of Pressure, pH & Viscosity- 2 questions and answers have been prepared according to the Electronics and Communication Engineering (ECE) exam syllabus.The Test: Measurement of Pressure, pH & Viscosity- 2 MCQs are made for Electronics and Communication Engineering (ECE) 2024 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for Test: Measurement of Pressure, pH & Viscosity- 2 below.
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Test: Measurement of Pressure, pH & Viscosity- 2 - Question 1
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What influences viscosity?

Detailed Solution for Test: Measurement of Pressure, pH & Viscosity- 2 - Question 1
Along with the shear rate, the temperature really is the dominating influence. The higher the temperature is, the lower a substance’s viscosity is. Consequently, decreasing temperature causes an increase in viscosity. For some fluids, a decrease of 1°C already causes a 10 % increase in viscosity.
Test: Measurement of Pressure, pH & Viscosity- 2 - Question 2
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A capillary tube is 30 mm long and 1 mm bore. The heat required to produce a flow rate of 8 mm3/s is 30 mm. The fluid density is 800 kg/m3. Calculate the dynamic viscosity of the oil.

Detailed Solution for Test: Measurement of Pressure, pH & Viscosity- 2 - Question 2
Rearranging Poiseuille’s equation we get

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Test: Measurement of Pressure, pH & Viscosity- 2 - Question 3
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Taking question 7 into consideration, and calculate the kinematic viscosity of the oil.

Detailed Solution for Test: Measurement of Pressure, pH & Viscosity- 2 - Question 3
v = μ/ρ = 0.0241/800 = 30.11 × 10-6 m2/s or 30.11 cSt.
Test: Measurement of Pressure, pH & Viscosity- 2 - Question 4
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Which of the following factors do not determine the Blood viscosity?
Detailed Solution for Test: Measurement of Pressure, pH & Viscosity- 2 - Question 4
Five primary factors determine blood viscosity. These include hematocrit, erythrocyte deformability, plasma viscosity, erythrocyte aggregation, and temperature. Hematocrit is the most obvious determinant of WBV. A higher percentage of red blood cells (RBCs) results in thicker blood.
Test: Measurement of Pressure, pH & Viscosity- 2 - Question 5
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At the bottom of a uniform cylindrical vessel of 30 cm height a horizontal capillary tube of 2mm inner diameter and 10 cm length is connected to discharge the liquid. Calculate the rate of discharge of the liquid if the vessel contains water of viscosity 0.01 poise to its 2/3 capacity. Take the density of water as 1 gm/cc.
Detailed Solution for Test: Measurement of Pressure, pH & Viscosity- 2 - Question 5

Test: Measurement of Pressure, pH & Viscosity- 2 - Question 6
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Taking question 10 into consideration, and Calculate the rate of discharge of the liquid if the vessel contains oil of viscosity 0.84 poise to its 2/3 capacity. Take the density of oil as 0.9 gm/cc.
Detailed Solution for Test: Measurement of Pressure, pH & Viscosity- 2 - Question 6

Test: Measurement of Pressure, pH & Viscosity- 2 - Question 7
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What is the pH of the seawater?
Detailed Solution for Test: Measurement of Pressure, pH & Viscosity- 2 - Question 7
Solutions with low pH are acidic and solutions with high pH are basic (also known as alkaline). Prior to the Industrial Revolution, the average ocean pH was about 8.2. Today, the average ocean pH is about 8.1.
Test: Measurement of Pressure, pH & Viscosity- 2 - Question 8
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Operation of McLeod gauge used for low-pressure measurement is based on the principle of
Detailed Solution for Test: Measurement of Pressure, pH & Viscosity- 2 - Question 8
Mcleod Gauge works on the principle of Boyle's Law. Boyle's Law states that if the temperature and amount of gas remain unchanged, the absolute pressure exerted by a given mass of gas is inversely proportional to the volume it occupies.
Test: Measurement of Pressure, pH & Viscosity- 2 - Question 9
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Which of the following is not a type of pressure sensing element?
Detailed Solution for Test: Measurement of Pressure, pH & Viscosity- 2 - Question 9
The main types of sensing elements are Bourdon tubes, diaphragms, capsules, and bellows. The Bourdon tube is a sealed tube that deflects in response to applied pressure.
Test: Measurement of Pressure, pH & Viscosity- 2 - Question 10
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Piezometer is used to measure the pressure of a
Detailed Solution for Test: Measurement of Pressure, pH & Viscosity- 2 - Question 10
Piezometer is used to measure underground water pressure. It converts water pressure to a frequency signal via a diaphragm and a tensioned steel wire. A change in pressure on the diaphragm causes a change in tension of the wire.
Test: Measurement of Pressure, pH & Viscosity- 2 - Question 11
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A Piezometer is used to measure
Detailed Solution for Test: Measurement of Pressure, pH & Viscosity- 2 - Question 11
A piezometer is either a device used to measure liquid pressure in a system by measuring the height to which a column of the liquid rises against gravity or a device that measures the pressure (more precisely, the piezometric head) of groundwater at a specific point.
Test: Measurement of Pressure, pH & Viscosity- 2 - Question 12
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A manometer is used to measure the pressure of a
Detailed Solution for Test: Measurement of Pressure, pH & Viscosity- 2 - Question 12
A manometer can be designed to directly measure absolute pressure. The manometer in Figure 5 measures the pressure compared to zero absolute pressure in a sealed leg above a mercury column. The most common form of this manometer is the conventional mercury barometer used to measure atmospheric pressure.
Test: Measurement of Pressure, pH & Viscosity- 2 - Question 13
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A manometer is used to measure the pressure of a
Detailed Solution for Test: Measurement of Pressure, pH & Viscosity- 2 - Question 13
Manometers are devices in which columns of a suitable liquid are used to measure the difference in pressure between two points or between a certain point and the atmosphere. The manometer is needed for measuring large gauge pressures.
Test: Measurement of Pressure, pH & Viscosity- 2 - Question 14
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A differential manometer is used to measure the pressure of a
Detailed Solution for Test: Measurement of Pressure, pH & Viscosity- 2 - Question 14
Differential manometers are used to measure the difference of pressures between two points in a pipe or in two different pipes. There are two types of differential manometers. It is used to measure pressure difference at two points in a pipe or between two pipes at different levels.
Test: Measurement of Pressure, pH & Viscosity- 2 - Question 15
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A differential manometer is used to measure the pressure difference between two points in a flowing
Detailed Solution for Test: Measurement of Pressure, pH & Viscosity- 2 - Question 15
Differential manometers are used to measure the difference of pressures between two points in a pipe or in two different pipes. There are two types of differential manometers. It is used to measure pressure difference at two points in a pipe or between two pipes at different levels.
Test: Measurement of Pressure, pH & Viscosity- 2 - Question 16
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A U-tube manometer is used to measure the pressure of a
Detailed Solution for Test: Measurement of Pressure, pH & Viscosity- 2 - Question 16
Pressure measuring devices using liquid columns in vertical or inclined tubes are called manometers. One of the most common is the water-filled u-tube manometer used to measure pressure difference in pitot or orifices located in the airflow in air handling or ventilation system.
Test: Measurement of Pressure, pH & Viscosity- 2 - Question 17
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A inverted tube manometer is used to measure the pressure difference between two points of a
Detailed Solution for Test: Measurement of Pressure, pH & Viscosity- 2 - Question 17
An inverted U-tube manometer is used to measure the pressure difference between two pipes A and B, as shown in the figure. Pipe A is carrying oil (specific gravity = 0.8) and pipe B is carrying water. The densities of air and water are 1.16 kg/ m3 and 1000 kg/m3, respectively.
Test: Measurement of Pressure, pH & Viscosity- 2 - Question 18
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A Bourdon tube pressure gauge measures
Detailed Solution for Test: Measurement of Pressure, pH & Viscosity- 2 - Question 18
Bourdon tube pressure gauges are used for the measurement of relative pressures from 0.6 ... 7,000 bar. They are classified as mechanical pressure measuring instruments and thus operate without any electrical power. Bourdon tubes are radially formed tubes with an oval cross-section.
Test: Measurement of Pressure, pH & Viscosity- 2 - Question 19
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Bourdon tubes are generally made of
Detailed Solution for Test: Measurement of Pressure, pH & Viscosity- 2 - Question 19
The Bourdon tube is an almost rectangular or elliptical cross-section tube made from materials such as stainless steel or phosphor bronze.
Test: Measurement of Pressure, pH & Viscosity- 2 - Question 20
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Which of the following is a mechanical gauge?
Detailed Solution for Test: Measurement of Pressure, pH & Viscosity- 2 - Question 20
Mechanical gauges are instruments that measure pressure, dimensions, levels, etc. They can be mechanical or electro-mechanical devices and offer displays ranging from direct-reading rules to digital LCDs. Gauges that measure pressure are classified as analog or digital depending on their readouts.
Test: Measurement of Pressure, pH & Viscosity- 2 - Question 21
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The simplest form of manometer used for measuring moderate pressures is
Detailed Solution for Test: Measurement of Pressure, pH & Viscosity- 2 - Question 21
Piezometer is one of the simplest forms of manometers. It can be used for measuring moderate pressures of liquids. The setup of piezometer consists of a glass tube, inserted in the wall of a vessel or of a pipe. The tube extends vertically upward to such a height that liquid can freely rise in it without overflowing.
Test: Measurement of Pressure, pH & Viscosity- 2 - Question 22
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Inclined single column manometer is useful for which of the pressure
Detailed Solution for Test: Measurement of Pressure, pH & Viscosity- 2 - Question 22
The inclined manometer is essential for retaining the most accurate pressure levels for industrial gas applications. A low-pressure industrial gas system may be used to heat or cool manufacturing processes. A small blockage within the gas system can be detected with an inclined manometer and corrected.
Test: Measurement of Pressure, pH & Viscosity- 2 - Question 23
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pH meters can be considered as voltage sources with which of the following internal resistances
Detailed Solution for Test: Measurement of Pressure, pH & Viscosity- 2 - Question 23
pH meters can be considered as voltage sources with very high internal resistance. In order to eliminate errors, no current should flow from the source.
Test: Measurement of Pressure, pH & Viscosity- 2 - Question 24
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The electrodes used in pH measurement have which of the following internal resistances?
Detailed Solution for Test: Measurement of Pressure, pH & Viscosity- 2 - Question 24
The electrodes used in pH measurement have very high internal resistance. It is of the order of 1000M ohm.
Test: Measurement of Pressure, pH & Viscosity- 2 - Question 25
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Which of the following is not a failure in pH meters?
Detailed Solution for Test: Measurement of Pressure, pH & Viscosity- 2 - Question 25
Defective calibration is not a failure in pH meters. Failure occurs due to defective electrodes, defective input circuitry, and defective electronic circuitry.
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