1. State the advantages of hot wire instruments
Ans - a) Measure both AC & DC , B) Less sensitive to stray magnetic field

2. Which of the following relates the emf. generated in a single homogeneous wire to the temperature difference
Ans- a) Peltier , b) Thomson , c) Seebeck

3. Typical specifications for design stipulates the gain margin and phase margin to be respectively
Ans- a) >1.7 and >30 deg , b) <1.7 and <30 deg

4. A negative gain margin expressed in decibels means a/an __________ system.
Ans- a) Critically damped , b) Unstable

5. Smoke density of the flue gas going out of the chimney is measured by a
Ans- a) Polarograph , b) Photo electric cell