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1) Which phenomenon results in producing the difference in resistance due to incapability to regain its original physical form before an application of stress to the gauge element? a. Hysteresis Effect b. Barkheussan Effect c. Differentiative Effect d. Integrative Effect
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2) How does the value of mutual inductance vary between two coils of an inductive transducer? a. By the variation in self-inductances and coupling coefficient b. By the variation in number of turns c. By the variation in reluctance and permeability d. All of the above
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3) What kind of electrical displacement transducers are used to measure an angular displacement? a. Variable Resistive Transducers b. Variable Capacitive Transducers c. Variable Inductive Transducers d. Synchros and Resolver Transducers
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4) How does it become possible to reduce the interference level generated corresponding to the stray magnetic fields in LVDT? a. By Shielding b. By Grounding c. Both a & b d. None of the above
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5) Which characteristics play a significant role in increasing the current flow continuously with the reduction in resistance until the heat dissipation of thermistor becomes exactly equal to the value of power supply? a. Voltage-Time Characteristics b. Current-Time Characteristics c. Resistance Temperature Characteristics d. Self-Heat Characteristics
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6) Which bridge is utilized in signal conditioning circuits for balancing purpose? a. Maxwell Bridge b. Wheatstone Bridge c. Wein Bridge d. Kelvin Bridge
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7) According to the law of intermediate metals, the thermal emf of any two metals in a homogeneous medium corresponding to third/other metal is nothing but equal to algebraic _______ a. Sum of individual e.m.fs w.r.t third/ another homogeneous metal b. Difference of individual e.m.fs w.r.t third /another homogeneous metal c. Sum of individual e.m.fs w.r.t third / another heterogeneous metal d. Difference of individual e.m.fs w.r.t third / another heterogeneous metal
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8) Piezo-electric crystals gets easily dissolved in ________ a. high humidity circum-ambient due to higher water solubility b. low humidity circum-ambient due to lesser water solubility c. high humidity circum-ambient due to lesser water solubility d. low humidity circum-ambient due to higher water solubility
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9) What is the major functioning role of piezoelectric transducers in spark ignition engines and electrostatic dust filters? a. Provision of high voltage & high current electric power b. Provision of low voltage & low current electric power c. Provision of high voltage & low current electric power d. Provision of low voltage & high current electric power
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10) Which category of photo-electric transducer leads to the production of an output voltage only in accordance and proportional to the radiation intensity? a. Photo-emissive Transducer b. Photo-conductive Transducer c. Photo-voltaic Transducer d. All of the above
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11) Which device or element is/are significantly responsible for estimating or determining the accuracy level in a digital thermometer? a. Analog to Digital Converter b. Thermocouple c. Scaling and Offset d. All of the above
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12) What is the resolution range of the digitally generated temperature differences by dual slope analog-to-digital converter (ADC) in a thermocouple? a. As small as 0.10C b. 0.10C to 0.20C c. 0.3C to 0.50C d. None of the above
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13) What is the temperature measuring range of a digital thermometer in almost all kinds of environment? a. +300C to +1000C b. -300C to +1000C c. +400C to + 1000C d. -400C to +1000C
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14) A single and fundamental form of load cell which is basically used as a transducer in the operation of a weighing machine undergoes the conversion of ________ a. Force into an electrical signal b. Pressure into an electrical signal c. Acceleration into an electrical signal d. Velocity into an electrical signal
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15) The occurrence of deformation in stain-gauges of a load cell under the application of pressure or strain becomes suitable for processing purpose and can be generally measured as _________ a. Mechanical signal b. Electrical signal c. Electrostatic signal d. Electromagnetic signal
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16) Which significant operations are performed by the micro-processor control unit on the basis of design necessity? a. Setting of zero adjustment level b. Maintenance of associated statistical data c. Provision of interfacing to a PC system d. All of the above
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17) Why is an ac power not required in the remote areas or locations for operation purpose of two-wire transmitter? a. Transmission power is lowered upto 4-20mA current output signal b. Transmission power is lowered upto 1-4 mA current output signal c. Transmission power is lowered upto 1-10 mA current output signal d. Two-wire transmitters do not operate in remote areas
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18) How does the appearance of any noise rather than the electrical noise that intrude in the current output signal of two-wire transmitter get eliminated? a. By common-mode rejection of transmitting device b. By common-mode rejection of interfacing device c. By common-mode rejection of receiving device d. None of the above
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19) The remote mounting feature of two-wire transmitter near the sensor reduces the effects of _________ a. Noise b. Signal Degradation c. Both a & b d. None of the above
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20) What is the relationship between the steady-state error, gain and the tendency of oscillations when the controller is supposed to be under the proportional action? a. Steady-state error increases with an increase in gain and oscillation tendency b. Steady-state error decreases with the decrease in gain and oscillation tendency c. Steady-state error decreases with an increase in gain and oscillation tendency d. Steady-state error increases with the decrease in gain and oscillation tendency
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