Multiple Choice Questions on Measurement and Instrumentation and Practice Test 6
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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There are 9 questions to be attended in 20 minutes. The questions are on Measurement and Instrumentation. Read the study material before making an attempt so that you build your confidence in the subject. This is the sixth of the series of 9 questions paper that will appear before the RRB examination for SSE and JE to be held in Dec.
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The Answer Key:
Sl No. Question Answer Remark 1 What 122°F will read on a Centigrade Scale? 50 In India, Centigrade and Fahrenheit scales are commonly used ( all human body temperature, air conditioning, refrigeration and heating work calculations are done at Fahrenheit scale), and therefore, conversion formula shall be at the finger tips of the engineers as 0C=(0F – 32)x(5/9) or value of 1220F in centigrade is calculated as (1220F-320F)*(5/9) = 500C. 2 When spring constant is C and deflection is θ, than controlling torque is given by Cθ The controlling torque is in direct proportion to the deflection angle in a spring on lines similar to the plain spring 3 Gnomon is used for the measurement of Time from sundial Gnomon is the triangular piece used at the centre of the sun dial to measure time by shadow of gnomon. 4 The barometer developed to avoid use of liquid was called aneroid Barometer Android is trade name for the platform used in mobile phones and nothing to do with pressure measurement. Aneroid means no air. One or multiple capsules made of an alloy of Cu and Beryllium is used with air evacuated from inside and supported with springs to avoid its collapse. Android is trade name for the platform used in mobile phones. Small changes of pressure results in the capsule which are measured through link mechanism and calibrated in terms of atmospheric pressure. 5 What precaution is to be taken while handling and installing Current Transformer? CT terminals are never left open If the CT terminals are left open, very high voltage will induce in the secondary. The CT ratio is of the order of 200 and if the voltage in the primary is 5V, the CT secondary will have an induced emf of 1000V, dangerously high to cause electric shock. 6 Meggers are used for the measure of insulation resistance and for portable application than how the voltage source is derived? using permanent magnet DC generator driven manually Voltage level required is 500, 1000 or 5000V DC depending on the level of insulation testing and cannot be produced by battery. Capacitor charging cannot produce constant voltage and AC is not a preferred voltage for insulation testing as it may result in its deterioration. 7 Bar Code readers commonly seen at billing counter employs the technology of laser beam Bar code reader uses laser beam to fall on the bar code and the reflected light is scanned for decoding the information in the code. 8 LVDT used for measurement of linear displacement, works on the principle of measurement of change in the induced voltage due change in flux linkage LVDT are widely used to measurement of linear displacement in machineries by varying the flux linkage and the induced voltage phase and magnitude analysed for direction and displacement. 9 This is not an electronic hygrometer Metal Paper coil Hygrometer In these devices, water vapour is absorbed by a salt-impregnated paper strip attached to a metal coil, causing the coil to change shape. -
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Question 1 of 9
1. Question
What 122°F will read on a Centigrade Scale?
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Question 2 of 9
2. Question
When spring constant is C and deflection is θ, than controlling torque is given by
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Question 3 of 9
3. Question
Gnomon is used for the measurement of
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Question 4 of 9
4. Question
The barometer developed to avoid use of liquid was called
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Question 5 of 9
5. Question
What precaution is to be taken while handling and installing Current Transformer?
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Question 6 of 9
6. Question
Meggers are used for the measure of insulation resistance and for portable application than how the voltage source is derived?
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Question 7 of 9
7. Question
Bar Code readers commonly seen at billing counter employs the technology of
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Question 8 of 9
8. Question
LVDT used for measurement of linear displacement, works on the principle of measurement of
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Question 9 of 9
9. Question
This is not an electronic hygrometer
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I need sample questions which are not in objective formats