1. . A junction / joint of two dissimilar metal is called _______.
(A) Reference point
(B) Solder joint
(C) Thermocouple
(D) PN junction
2. . The operation of a Thermocouple is based on _______.
(A) Seebeck effect
(B) Peltier effect
(C) Thomson effect
(D) Faraday's laws
3. . Which of the following is an active transducer?
(A) Strain gauge
(B) Thermistor
(C) Thermocouple
(D) Resistance thermometer
4. . What happens when heat is applied to the joined ends of wires of thermocouple?
(A) The wires contract
(B) the wires start to rotate
(C) Small voltage is generated
(D) the wires separate
5. . ________ converts change in temperature of its metallic junction to electrical voltage.
(A) Thermocouple
(B) Actuator
(C) Thermistor
(D) Electrometer
6. . Identify the thermocouple type with the highest temperature limit from those listed here:
(A) K type
(B) S type
(C) J type
(D) T type
7. . The negative lead of a thermocouple is always colored:
(A) Blue
(B) Yellow
(C) Red
(D) White
8. . When the reference junction is the same temperature as the measurement junction in a thermocouple circuit, the output voltage is ________.
(A) Low
(B) High
(C) Intermediate
(D) Zero
9. . Thermocouples are used for the measurement of
(A) Density
(B) Temperature
(C) Pressure
(D) Flow
10. . The series & parallel groups of thermocouples are called ________.
(A) Constantan
(B) Thermopiles
(C) Thermodynamics
(D) Thermometer
11. . Thermocouple extension wire may be readily distinguished from regular thermocouple-grade wire by:
(A) Different metal types
(B) Outer sheath color
(C) Thickness
(D) Special markings on the wire’s insulation
12. . A type J thermocouple is made of the following metals:
(A) Iron and Constantan
(B) Aluminum and Tungsten
(C) Chromel and Alumel
(D) Copper and Constantan
13. . Thermopile is used for the measurement of ___________________?
(A) Current
(B) E.M.F.
(C) Flow rate
(D) Temperature