Question: All the thermocouples used for temperature measurement use dissimilar metal ________________?

• 1. Strips
• 2. Bars
• 3. Wires
• 4. Beads

Question: A non-linear chemical system is exemplified by a/an_________________?

• 1. Isothermal CSTR
• 2. Mixer
• 3. Non-isothermal CSTR
• 4. None of these

Question: Continuous flue gas analyser makes use of paramagnetic properties of some of its constituents, which move towards the strongest part of the magnetic field thus displacing diamagnetic gases. Which of the following gases is diamagnetic ?

• 1. CO2
• 2. O2
• 3. NO
• 4. NO2

Question: Phase margin is equal to_______________?

• 1. 180° – phase lag
• 2. Phase lag – 180°
• 3. Phase lag + 180°
• 4. Phase lag + 90°

Question: For the time domain function f(t) = t, the Laplace transform of ∫0 t f(t) dt is given by___________________?

• 1. 1/2 S3
• 2. 2/S3
• 3. 1/S3
• 4. 2/S2

Question: Thermocouple is suitable for measuring_________________?

• 1. Liquid temperatures only
• 2. Very high temperatures only
• 3. Very low temperatures only
• 4. Both high and low temperatures

Question: The frequency at which maximum amplitude ratio is attained is called the ______________ frequency?

• 1. Corner
• 2. Resonant
• 3. Cross-over
• 4. Natural

Question: The time taken for a radioactive element to reduce to 50% of its original weight is _____________ years, if its half life period is 12 years?

• 1. 24
• 2. 18
• 3. 6
• 4. 36

Question: Pick out the wrong statement?

• 1. There is no transfer lag for a single first order system
• 2. Stirred tank with a water jacket exemplifies an interacting system
• 3. Transfer lag is a characteristic of all higher order systems (other than first order systems)
• 4. Transfer lag decreases as the number of stages decreases

Question: Pick out the wrong statement ?

• 1. Proportional controller is normally used for level control in industrial applications
• 2. CSTR can be considered as a distributed parameter system
• 3. Distributed parameter approach gives partial differential equation
• 4. Non-linear behaviour is exemplified by an on-off controller