127. Transducer is a device which
A. converts one form of power into another
B. converts one form of energy into another
C. helps in measuring electrical signal
D. is similar to a transformer

---

128. Apart from LVDT, linear displacement can also be sensed by
A. RVDT
B. capacitance transformer
C. thermocouple
D. sensistor

---

129. Strain gauge is used to
A. convert sound energy into electrical energy
B. sense temperature
C. convert electrical current into a mechanical displacement
D. to convert mechanical displacement into a change in resistance

---

130. Thermocouple transducer is used for
A. temperature measurement
B. velocity and vibration measurement
C. pressure measurement
D. acceleration measurement

---

131. Differential transformer transducer is used for the measurement of
A. displacement
B. liquid level
C. temperature
D. speech and music

---

132. Principle of Pirani gauge is based on
A. humidity of the medium
B. thermal condictivity of the medium
C. combustibility of the medium
D. electrical resistivity of the medium

---

133. A differential transformer is a
A. variable inductance transducer
B. variable pressure transducer
C. constant displacement transducer
D. constant pressure transformer

---