Resistance Temperature Detector Question & AnswersMarch 4, 2023 By Wat Electrical This article lists 100 Resistance Temperature Detector MCQs for engineering students. All the Resistance Temperature Detector Questions & Answers given below include a hint and a link wherever possible to the relevant topic. This is helpful for users who are preparing for their exams, interviews, or professionals who would like to brush up on the fundamentals of Resistance Temperature Detector.A resistance-type temperature detector or an RTD, Resistance thermometer/sensor is a device that measures the quantity of temperature flow in an electric-type substance. It measures the quantity in terms of ohms. The component used in the RTD bridge-based circuit includes an RTD sensor, resistors, and voltage source. They are classified into multiple types based on substances used in their design, such as copper, nickel, and platinum. The techniques to measure temperature via RTD are 2, 3, and 4 wire.The advantage of a resistance temperature detector includes greater stability, greater repeatability, and accuracy. The disadvantages of RTD sensors include high cost, minimum sensitivity, and performs on input sources application.The applications of RTD include temperature measuring, microelectronics, and the textile industry. Compared to other temperature sensor such as thermometers and thermocouples; RTDs are more accurate. 1). A resistance type temperature detector is also called? Resistance thermometer RTD Resistance sensor All the above None Hint2). Which of the following are other types of temperature sensors? Thermocouple Thermistor Thermometer All the above None HintRead more about Thermocouple 3). A RTD based device has ____ characteristics with respect to a range of temperature? Linear Non-linear Zero Both a and c None Hint4). Which of the following is RTD temperature resistance formula? Rt=R0[1+a(t-t0)+B(t-to)^2+………..] Rt=R0[1-(t-t0)+B(t-to)^2+………..] Rt=-R0[1+(t-t0)+B(t-to)^2+………..] Rt=1/R0[1+(t-t0)+B(t-to)^2+………..] None Hint5). Which of the following is the formula for small range temperature value? Rt=R0[1+(t-t0)] Rt=R0[1-(t-t0)] Rt=-R0[1+(t-t0)] Rt=1/R0[1+(t-t0)] None Hint6). Which of the following substances are used in RTD devices? Copper Nickel Platinum All the above None Hint7). Which of the following metal has melting temperature at 650 degrees? Copper Nickel Platinum Graphite None Hint8). Which of the following metal has melting temperature at 120 degrees? Copper Nickel Platinum Graphite None Hint9). Which of the following metal has melting temperature at 300 degrees? Copper Nickel Platinum Graphite None Hint10). Which of the following is the resistance value change of platinum per degree celsius? 0.4 0.5 0.8 1 None Hint11). Which of the following is the formula to check platinum metal purity? R100/R0 R0/R100 –R100/R0 1/R100 * R0 None Hint12). Which of the following substance is placed between steel sheath & wire resistance material for good electrical based insulation? Mica Ferrous Cobalt Copper None Hint13). Which of the following are the substances of RTD? Coil Mica frame Stainless steel sheath All the above None Hint14). Which of the following is negligible parameter in a RTD wire? Stress Strain Friction Both a and c None Hint15). Which of the following is the benefit of mica cross based frame in a RTD device? Enhanced thermal conductivity Minimum response time Greater rate of heat transfer All the above None Hint16). Which of the following parameter is decreased when wire strain increases? Tension Stress Strain Torque None Hint17). Which of the following component are used in RTD bridge based circuit? Resistors Current source Voltage source Both a and c None Hint18). Which of the following is the formula for power dissipation of RTD? I^2 * R -I^2 * R 1/I^2 * R I^2 - R None HintRead more about Digital Sensor19). The electric current in RTD should be maintained? Low Constant High Both a and b None Hint20). Which of the following errors are minimized with known RTD procedure? Lead wire type error Calibration type error Inductance error Both a and b None Hint21). Which of the following parameter is measured across resistor in RTD bridge circuit? Voltage drop Current drop Resistance drop All the above None Hint22). Which of the following are the types of RTD bridge configuration circuit? 1-wire 2-wire 3-wire Both b and c None HintRead more about Resistor 23). In which of the following bridge configuration dummy wire is not added? 1-wire 2-wire 3-wire Both b and c None Hint24). Which of the following is the resistance units? Ohms Farads Henry Columns None Hint25). Which of the following is the formula for resistivity? R= p [l/A] R= - p [l/A] R= p [l+A] None HintResistance Temperature Detector MCQs for Students26). Which of the following is the advantage of resistance temperature detector? Greater stability Greater repeatability Great accuracy All the above None Hint27). Which of the following are the disadvantages of RTD sensor? High cost Low sensitivity Requires input source All the above None Hint28). Which of the following are the applications of RTD? Temperature measuring Micro electronics Textile industry All the above None Hint29). Which of the following device does RTD replaces? Thermocouple Thermistor Thermometer All the above None Hint30). Which of the following is required in thermocouple? Seebeck effect Electrical resistance Electrical capacitance All the above None Hint31). Which of the following is the principle of RTD? Resistance-temperature Resistance-capacitor Capacitor-temperature Resistance-inductor None Hint32). A sensor device is ___ type of component? Electrical Electronic Mechanical All the above None Hint33). A piezoelectric based sensor is used for calculating? Voltages Current Acceleration All the above None Hint34). Which of the following parameter does hall effect measures? Magnetic density Magnetic flux Electric flux All the above None Hint35). Which of the following substance protects the resistive substance in a RTD? Insulation Resistance Reactance All the above None Hint36). Which of the following insulation materials are used having below 250 degree Centigrade? Silicon Rubber PVC All the above None Hint37). Which of the following are the examples of RTD? Coolant sensor Transmission oil temperature Fir detector Fir detector None Hint38). Which of the following substances causes seebeck effect in a term? Iron Copper Lead Both a and b None Hint39). A seebeck effect is ____ type of force? Electromotive Electromagnetic Magnetomotive Dielectric None Hint40). The value of voltage in a circuit is _____ when voltage drop occurs? Decreased Increased Constant Both a and b None Hint41). In which of the following circuit portions does voltage drop occurs in a electric circuit? Passive elements Contacts Connectors All the above None Hint42). Which of the following are the examples of active elements in a electronic circuit? Voltage sources Generators Diodes All the above None Hint43). Which of the following are the examples of passive components in a electronic circuit? Resistors Inductors Capacitors All the above None HintRead more about Core Transformer44). Identify the RTD bridge configuration from the following image?RTD bridge diagram 2 wire 3 wire 4 wire 1 wire None Hint45). Identify the RTD bridge configuration from the following image?RTD bridge diagram 2 wire 3 wire 4 wire 1 wire None Hint46). Which among the RTD bridge configuration is most complex ? RTD wire 2 RTD wire 3 RTD wire 4 RTD wire 5 None Hint47). Which of the following is the advantage of RTD bridge wire 4? Efficient Accuracy Simple Both a and b None Hint48). Which of the following is the 2-wire RTD bridge resistance formula? Where Resistance RT, R, R1, R2 are in the circuit. RT= R1+R2+RE RT= R1+R2-RE RT= R1-R2+RE None Hint49). Which of the following are the applications of temperature sensor? HV systems AC systems Medical devices All the above None Hint50). Which of the following states does a thermometer can measure? Solid Liquid Gas All the above None HintResistance Temperature Detector for Interviews51). What is the temperature range of RTD? -270 C to +850 C -270 C to -850 C -270 C to +50 C -270 C to +80 C None Hint52). Which of the following is error rate formula of RTD? Delta T = P * S Delta T = P - S Delta T = P + S Delta T = P / S None Hint53). Which of the following are the techniques to measure temperature via RTD? 2-wire 3-wire 4-wire All the above None Hint54). In which of the following RTD temperature measuring techniques current is sent on one wire set and voltage is sensed on other wire set? 2-wire 3-wire 4-wire All the above None Hint55). A RTD is a __ type of temperature sensing type device? Active Passive Independent Both a and c None Hint56). When temperature is rised in RTD then resistance of metal ______ with respect to floe of current? Increased Decreased Constant Zero None Hint57). Which of the following is the centralised element of RTD? Resistance Thermometer Sensor Wire None Hint58). Which of the following are the units calibrated from RTD? Ohms Centigrade Kilos Meters None Hint59). A platinum substance of RTD component has ______ temperature coefficient? Positive Negative Zero Constant None Hint60). Which of the following extension leads does a platinum sensor element of RTD uses? Copper Iron Cobalt Aluminium None Hint61). Which of the following are the advantages of a platinum sensor if used in RTD? Stable Positive temp coefficient Linear All the above None Hint62). Which of the following is the operational temperature value of Nickel if used in RTD? -80 C to 260 C -112 F to 500 F 300 C Both a and b None Hint63). At which of the following temperature range does Nickel based substance become non-linear in a RTD? -80 C to 260 C -112 F to 500 F 300 C Both a and b None Hint64). Which of the following are the properties of Copper based substance? Linearity Minimum resistivity Minimum cost All the above None Hint65). A balco based RTD sensors has which of the following substances? Nickel Iron Copper Both a and b None Hint66). At which of the following temperature ranges, 500 ohms Balco based RTD provides linear resistance property? -40 to 116C -40 to 240C 40 to 116C Both a and b None Hint67). Which of the following are the properties of Balco based RTD sensor? Minimum cost Greater resistance coefficient Low cost All the above None Hint68). Which of the following are the properties of tungsten based RTD? Enhanced resistivity Brittle Irregular in shape All the above None Hint69). Which of the following are the characteristics of thin film RTD? Rugged Reliable Vibration damage resistance All the above None Hint70). Which of the following are the components of Thin film RTD type sensor? Resistance trimming loops Ceramic chip ETD Lead wires All the above None Hint71). Which of the following type of RTD sensor has thin type wound wire in an ceramic housing holding non-conductive type powder? Coiled RTD Wire wound RTD Thin film RTD PT 100 RTD None Hint72). Which of the following is the advantage of coiled RTD type sensor? Minimises errors Increase in resistance Low heat transfer Low response time None Hint73). Which of the following components of Coiled Element of RTD is placed with in protective metal sheath? Ceramic housing Glass housing Iron housing Both a and b None Hint74).Which of the following element is used for designing PT100 type RTD sensor? Platinum Copper Aluminium Iron None Hint75). What is the temperature of PT 100 RTD for 100 ohms? 0-32 degrees F 0-22 degrees F 0-392 degrees F 0-328 degrees F None HintResistance Temperature Detector MCQs for Exams76). Which of the following is the common temperature coefficient of PT100 RTD sensor? 385 12 909 345 None Hint77). In which of the following application PT10000 RTD sensor is used? 1-wire 2-wire 3-wire 4-wire None Hint78). Which are the advantages of PT 1000 RTD sensor? More resistance Mini input current Less power All the above None Hint79). In which form is the measure output obtained from RTD sensor is? Temperature Electric Mechanic Chemical None Hint80). RTD is ____ in protective casing? Wire wounded Bridged Cascaded Clipped None Hint81). In which of the following applications RTDs are coated using Perfluoroalkovy? Plating baths Pressurized systems Copper tubs Both a and b None Hint82). Which of the following is the measuring range of thermocouple? 1700 1500 1300 1100 None Hint83).Which of the following is RTDs industrial applications temperatures reading? 200C 400C 500C Both a and b None Hint84). Which device has quick response time? Thermometer RTD Thermocouple All the above None Hint85). Which device fails to operate in vibrational environment? Thermometer RTD Thermocouple All the above None Hint86). What is the power range of RTD? 1mA to 10mA 2mA to 3mA 3mA to 4mA 4mA to 5mA None Hint87). Which devices do not require external power supply to operate? Thermometer RTD Thermocouple Both a and c None Hint88). Which devices generates EMF fields? Thermometer RTD Thermocouple Both a and c None Hint89). What is the accuracy of RTD? 0.11C 0.2C 0.1C 1C None Hint90). Which is the accuracy of thermocouple? 0.11C 0.2C 0.1C 1C None Hint91). Which of the following is benefit of RTD I solar power application? Doesnot heat fast Temperature monitoring Equal heat distribution All the above None Hint92). Which of the following RTD sensor is used in pharmaceutical based industry? Chemical Semiconductor Solar Automotive None Hint93). Which are benefits of semiconductor type RTD sensor? High temperature control Accurate Repeatability All the above None Hint94). In which stages of food processing RTD sensor is used? Manufacturing Storage Shipping All the above None Hint95). In which stages RTD sensor is used in HAVC? Monitoring temp Fire detection Climate control All the above None Hint96). Which are the use of RTD in aerospace? Monitor temperature Fuel checker Coolant Compressors None Hint97). In which components does RTD used as temperature control in medical field? Incubators Respiration devices Dialysis All the above None Hint98). In which components does RTD used as temperature control in communication field? Sound production Amplifiers Transmitters All the above None Hint99). In which configuration current flow is maximum? Series Parallel Concurrent Both a and b None Hint100). Which of the following are units of temperature? Farads Celsius Kelvin All the above None Hint Time's up
