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1) ____________ is the static characteristics of an instrument? a. Response b. Tine lag c. Drift d. Dynamic error
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2) High temperature of around 2000°C of incandescent gas mantles is measured by a/an __________________? a. Specially designed thermocouple b. Optical pyrometer c. Radiation pyrometer d. None of these
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3) Zirconia probe is used for the continuous measurement of ______________ flue gases going out of the furnace? a. Oxygen in b. Carbon dioxide in c. Carbon monoxide in d. Temperature of
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4) Which of following error integral is considered as the best criterion in controller settings ? a. ∫0 ∞ |e| dt b. ∫0 ∞ |e2| dt c. ∫0 ∞ e2 dt d. None of these
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5) The amplitude ratio for the sinusoidal response of a _____________ is 1? a. First order system b. Second order system c. Transportation lag d. None of these
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6) Which of the following is the dynamic characteristics of an instrument ? a. Reproducibility b. Sensitivity c. Dead zone d. Fidelity
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7) Liquid levels in autoclaves are measured by ________________? a. Simple float b. Differential float type manometer c. Glass gauge d. None of these
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8) For increased speed of response of an expansion pressure spring thermometer, the thermometer bulb should have a__________________? a. Large area but small mass b. High thermal conductivity c. Small specific heat d. All A , B & C
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9) Which of the following controllers has the least maximum deviation ? a. P-controller b. P-I controller c. P-I-D controller d. P-D controller
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10) Out of the following thermocouple wire insulating material, the highest temperature rating is for________________? a. Teflon b. Ceramic fibre c. Asbestos d. Fibre glass
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11) Turbine flow meters are suitable for_________________? a. Very limited flow ranges b. Cryogenic flow measurements c. Aerospace and in air borne applications d. Both B. and C.
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12) Load cells are used for the measurement of __________________? a. Stress b. Weight c. Strain d. Velocity
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13) Gas analysis is commonly done using the___________________? a. Thermal conductivity cell b. X-ray diffraction c. Mass spectrometer d. Emission spectrometer
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14) Stalagmometer is used for the measurement of__________________? a. Kinematic viscosity b. Surface tension c. Refractive index d. Optical activity
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15) The transfer function for a PID controller is (where, η i is the integral (reset) time and ηD is the derivative time.) ? a. Kc(1 + ηis + ηD ). s b. Kc[1 + (1/ηis) + ηD . s) c. Kc(1 + ηis + (1/ηD . s) d. None of these
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16) Polarisation of light forms the working principle of a______________? a. Polarimeter b. Polarograph c. Chromatograph d. Spectrometer
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17) ____________ are analysed using a Polarograph? a. Isotonic solutions b. Solids c. Liquids d. Gases
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18) Dilute wine was used as a thermometric liquid initially to develop temperature scale. First empirical temperature scale developed was the _____________ scale? a. Kelvin b. Centigrade c. Fahrenheit d. Reaumer
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19) The open loop transfer function of a control system is KR/(1 + TS). This represents ______________? a. A first order system b. Dead time system c. A first order time lag d. A second order system
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20) The term analogous to the electrical current in a thermal system is the_________________? a. Temperature difference b. Heat flow rate c. Heat content in the system d. None of these
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