Multiple Choice Questions on Measurement and Instrumentation and Practice Test 7
There are 9 questions to be attended in 20 minutes. The questions are on Measurement and Instrumentation. The study material is provided along with the remarks for each answer after you complete the examination to help building knowledge on the subject. It may be better to study before attempting the mock drill so that by the time you reach 9th of the test, you score is around 80-90%. There are 9 question banks of 9 question each and you should attempt each of these question bank to test your preparedness for the final day of the RRB examination for SSE and JE to be held in Dec.
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This is a mock drill question bank on Basic Concept of Science of Class XI and XII standard. This is the question bank of 10 questions with set for 10 minutes. After you finish the test, press Quiz Finish and you will get the answer sheet, your result and its comparison with others. You will also be given remarks containing the explanation about the answer and also about the distracters (other options) to build confidence on the subject.
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The Answer Key:
Sl No. Question Answer Remark 1 A bulb having 100 lumen output, uses optics to concentrate the entire output in half stredian, than the luminous intensity will be 200 candela Luminous intensity is the perceived power per unit sterdian therefore, 100/(1/2)=200 candela 2 Piezoelectric load cell are used for measurement in-motion weigh bridges and the principle employed is of conversion of pressure into generation of electrical signal Piezo electric load cell converts pressure signal into micro-volt signal and used for measurement of weight. In piezoresistive load cell, the resistance changes and measured for calculation of weight. The inductance and capacitance remains same. 3 Swing time of a pendulum clock is directly proportional to the square root of length Pendulum time of swing is given by 2π√l/g; therefore in direct proportional to square root of length 4 Bourdon tube sensors are used for the measurement of Gauge pressure Bourdon tube is used in pressure gauges. It is C shaped, sealed at one end and another connected to the pipe whose pressure to measured. The change in pressure results in change in the shape of the tube which is measured through link mechanism and displayed on a calibrated scale. 5 Active power in AC circuit is given by VACosɸ The apparent power is V*A, Active power is VACosɸ and reactive power is VASinɸ. Cosɸ is also called PF. ɸ is the phasor angle between voltage and current. 6 Heterodyne is used for the measurement high frequency electromagnetic waves A reference signal of a known frequency near the unknown frequency is mixed with the unknown frequency in a nonlinear mixing device such as a diode. This creates a heterodyne or beat signal at the difference between the two frequencies. 7 The term Poisson effect is connected with the theory that when a force is applied in one direction, there is a resultant change of increase in length in other two directions When a material is compressed in one direction, it usually tends to expand in the other two directions perpendicular to the direction of compression. This phenomenon is called the Poisson effect. Poisson’s ratio ν (nu) is a measure of this effect. The Poi 8 Instrument used for the measurement of dielectric loss is Schering Bridge 9 Capacitive Hygrometer works on the principle of measurement of capacitance due to change of dielectric constant The value of capacitance is given by ε*A/d; there is no effect on the area and thickness due to change in moisture except the dielectric constant. -
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Question 1 of 9
1. Question
A bulb having 100 lumen output, uses optics to concentrate the entire output in half stredian, than the luminous intensity will be
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Question 2 of 9
2. Question
Piezoelectric load cell are used for measurement in-motion weigh bridges and the principle employed is
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Question 3 of 9
3. Question
Swing time of a pendulum clock is directly proportional to the
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Question 4 of 9
4. Question
Bourdon tube sensors are used for the measurement of
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Question 5 of 9
5. Question
Active power in AC circuit is given by
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Question 6 of 9
6. Question
Heterodyne is used for the measurement
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Question 7 of 9
7. Question
The term Poisson effect is connected with the theory that
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Question 8 of 9
8. Question
Instrument used for the measurement of dielectric loss is
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Question 9 of 9
9. Question
Capacitive Hygrometer works on the principle of measurement of
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