Resistance Temperature Detector Question & Answers March 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 Hint 2). Which of the following are other types of temperature sensors? Thermocouple Thermistor Thermometer All the above Hint Read 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 Hint 4). 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+………..] Hint 5). 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)] Hint 6). Which of the following substances are used in RTD devices? Copper Nickel Platinum All the above Hint 7). Which of the following metal has melting temperature at 650 degrees? Copper Nickel Platinum Graphite Hint 8). Which of the following metal has melting temperature at 120 degrees? Copper Nickel Platinum Graphite Hint 9). Which of the following metal has melting temperature at 300 degrees? Copper Nickel Platinum Graphite Hint 10). Which of the following is the resistance value change of platinum per degree celsius? 0.4 0.5 0.8 1 Hint 11). Which of the following is the formula to check platinum metal purity? R100/R0 R0/R100 –R100/R0 1/R100 * R0 Hint 12). Which of the following substance is placed between steel sheath & wire resistance material for good electrical based insulation? Mica Ferrous Cobalt Copper Hint 13). Which of the following are the substances of RTD? Coil Mica frame Stainless steel sheath All the above Hint 14). Which of the following is negligible parameter in a RTD wire? Stress Strain Friction Both a and c Hint 15). 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 Hint 16). Which of the following parameter is decreased when wire strain increases? Tension Stress Strain Torque Hint 17). Which of the following component are used in RTD bridge based circuit? Resistors Current source Voltage source Both a and c Hint 18). 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 Hint Read more about Digital Sensor 19). The electric current in RTD should be maintained? Low Constant High Both a and b Hint 20). Which of the following errors are minimized with known RTD procedure? Lead wire type error Calibration type error Inductance error Both a and b Hint 21). Which of the following parameter is measured across resistor in RTD bridge circuit? Voltage drop Current drop Resistance drop All the above Hint 22). Which of the following are the types of RTD bridge configuration circuit? 1-wire 2-wire 3-wire Both b and c Hint Read 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 Hint 24). Which of the following is the resistance units? Ohms Farads Henry Columns Hint 25). Which of the following is the formula for resistivity? R= p [l/A] R= - p [l/A] R= p [l+A] Hint Resistance Temperature Detector MCQs for Students 26). Which of the following is the advantage of resistance temperature detector? Greater stability Greater repeatability Great accuracy All the above Hint 27). Which of the following are the disadvantages of RTD sensor? High cost Low sensitivity Requires input source All the above Hint 28). Which of the following are the applications of RTD? Temperature measuring Micro electronics Textile industry All the above Hint 29). Which of the following device does RTD replaces? Thermocouple Thermistor Thermometer All the above Hint 30). Which of the following is required in thermocouple? Seebeck effect Electrical resistance Electrical capacitance All the above Hint 31). Which of the following is the principle of RTD? Resistance-temperature Resistance-capacitor Capacitor-temperature Resistance-inductor Hint 32). A sensor device is ___ type of component? Electrical Electronic Mechanical All the above Hint 33). A piezoelectric based sensor is used for calculating? Voltages Current Acceleration All the above Hint 34). Which of the following parameter does hall effect measures? Magnetic density Magnetic flux Electric flux All the above Hint 35). Which of the following substance protects the resistive substance in a RTD? Insulation Resistance Reactance All the above Hint 36). Which of the following insulation materials are used having below 250 degree Centigrade? Silicon Rubber PVC All the above Hint 37). Which of the following are the examples of RTD? Coolant sensor Transmission oil temperature Fir detector Fir detector Hint 38). Which of the following substances causes seebeck effect in a term? Iron Copper Lead Both a and b Hint 39). A seebeck effect is ____ type of force? Electromotive Electromagnetic Magnetomotive Dielectric Hint 40). The value of voltage in a circuit is _____ when voltage drop occurs? Decreased Increased Constant Both a and b Hint 41). In which of the following circuit portions does voltage drop occurs in a electric circuit? Passive elements Contacts Connectors All the above Hint 42). Which of the following are the examples of active elements in a electronic circuit? Voltage sources Generators Diodes All the above Hint 43). Which of the following are the examples of passive components in a electronic circuit? Resistors Inductors Capacitors All the above Hint Read more about Core Transformer 44). Identify the RTD bridge configuration from the following image? RTD bridge diagram 2 wire 3 wire 4 wire 1 wire Hint 45). Identify the RTD bridge configuration from the following image? RTD bridge diagram 2 wire 3 wire 4 wire 1 wire Hint 46). Which among the RTD bridge configuration is most complex ? RTD wire 2 RTD wire 3 RTD wire 4 RTD wire 5 Hint 47). Which of the following is the advantage of RTD bridge wire 4? Efficient Accuracy Simple Both a and b Hint 48). 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 Hint 49). Which of the following are the applications of temperature sensor? HV systems AC systems Medical devices All the above Hint 50). Which of the following states does a thermometer can measure? Solid Liquid Gas All the above Hint Resistance Temperature Detector for Interviews 51). 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 Hint 52). 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 Hint 53). Which of the following are the techniques to measure temperature via RTD? 2-wire 3-wire 4-wire All the above Hint 54). 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 Hint 55). A RTD is a __ type of temperature sensing type device? Active Passive Independent Both a and c Hint 56). When temperature is rised in RTD then resistance of metal ______ with respect to floe of current? Increased Decreased Constant Zero Hint 57). Which of the following is the centralised element of RTD? Resistance Thermometer Sensor Wire Hint 58). Which of the following are the units calibrated from RTD? Ohms Centigrade Kilos Meters Hint 59). A platinum substance of RTD component has ______ temperature coefficient? Positive Negative Zero Constant Hint 60). Which of the following extension leads does a platinum sensor element of RTD uses? Copper Iron Cobalt Aluminium Hint 61). Which of the following are the advantages of a platinum sensor if used in RTD? Stable Positive temp coefficient Linear All the above Hint 62). 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 Hint 63). 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 Hint 64). Which of the following are the properties of Copper based substance? Linearity Minimum resistivity Minimum cost All the above Hint 65). A balco based RTD sensors has which of the following substances? Nickel Iron Copper Both a and b Hint 66). 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 Hint 67). Which of the following are the properties of Balco based RTD sensor? Minimum cost Greater resistance coefficient Low cost All the above Hint 68). Which of the following are the properties of tungsten based RTD? Enhanced resistivity Brittle Irregular in shape All the above Hint 69). Which of the following are the characteristics of thin film RTD? Rugged Reliable Vibration damage resistance All the above Hint 70). Which of the following are the components of Thin film RTD type sensor? Resistance trimming loops Ceramic chip ETD Lead wires All the above Hint 71). 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 Hint 72). Which of the following is the advantage of coiled RTD type sensor? Minimises errors Increase in resistance Low heat transfer Low response time Hint 73). 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 Hint 74).Which of the following element is used for designing PT100 type RTD sensor? Platinum Copper Aluminium Iron Hint 75). 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 Hint Resistance Temperature Detector MCQs for Exams 76). Which of the following is the common temperature coefficient of PT100 RTD sensor? 385 12 909 345 Hint 77). In which of the following application PT10000 RTD sensor is used? 1-wire 2-wire 3-wire 4-wire Hint 78). Which are the advantages of PT 1000 RTD sensor? More resistance Mini input current Less power All the above Hint 79). In which form is the measure output obtained from RTD sensor is? Temperature Electric Mechanic Chemical Hint 80). RTD is ____ in protective casing? Wire wounded Bridged Cascaded Clipped Hint 81). In which of the following applications RTDs are coated using Perfluoroalkovy? Plating baths Pressurized systems Copper tubs Both a and b Hint 82). Which of the following is the measuring range of thermocouple? 1700 1500 1300 1100 Hint 83).Which of the following is RTDs industrial applications temperatures reading? 200C 400C 500C Both a and b Hint 84). Which device has quick response time? Thermometer RTD Thermocouple All the above Hint 85). Which device fails to operate in vibrational environment? Thermometer RTD Thermocouple All the above Hint 86). What is the power range of RTD? 1mA to 10mA 2mA to 3mA 3mA to 4mA 4mA to 5mA Hint 87). Which devices do not require external power supply to operate? Thermometer RTD Thermocouple Both a and c Hint 88). Which devices generates EMF fields? Thermometer RTD Thermocouple Both a and c Hint 89). What is the accuracy of RTD? 0.11C 0.2C 0.1C 1C Hint 90). Which is the accuracy of thermocouple? 0.11C 0.2C 0.1C 1C Hint 91). Which of the following is benefit of RTD I solar power application? Doesnot heat fast Temperature monitoring Equal heat distribution All the above Hint 92). Which of the following RTD sensor is used in pharmaceutical based industry? Chemical Semiconductor Solar Automotive Hint 93). Which are benefits of semiconductor type RTD sensor? High temperature control Accurate Repeatability All the above Hint 94). In which stages of food processing RTD sensor is used? Manufacturing Storage Shipping All the above Hint 95). In which stages RTD sensor is used in HAVC? Monitoring temp Fire detection Climate control All the above Hint 96). Which are the use of RTD in aerospace? Monitor temperature Fuel checker Coolant Compressors Hint 97). In which components does RTD used as temperature control in medical field? Incubators Respiration devices Dialysis All the above Hint 98). In which components does RTD used as temperature control in communication field? Sound production Amplifiers Transmitters All the above Hint 99). In which configuration current flow is maximum? Series Parallel Concurrent Both a and b Hint 100). Which of the following are units of temperature? Farads Celsius Kelvin All the above Hint Time's up
