Butadiene is a/an di-olefin naphthene aromatic olefin

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1. In a second order under damped system, the
Options
A. time required for the response of first reach its ultimate value is called the response time.
B. overshoot (which is a measure of how much the response exceeds the ultimate value) increase with the decrease of damping co-efficient e.
C. decay ratio (which is the ratio of the sizes of successive peaks) is equal to the reciprocal of overshoot.
D. characteristics of a step response is represented by

2. Which of the following thermocouples is the most suitable for measuring a temperature of about 1600�C in an oxidizing atmosphere?
Options
A. Platinum-platinum + rhodium
B. Iron-constantan
C. Copper-constantan
D. Chromel-alumel

3. A photo electric device in which the resistance of the metal is directly proportional to the light striking on it, is known as photo-conductive cell. Photoelectric transducers are used for the measurement of those parameters, which can be used to produce variation in
Options
A. light intensity
B. current
C. flux density
D. voltage

4. Bond crushing law
Options
A. calls for relatively less energy for the smaller product particles, than does the Rittinger law.
B. is less realistic in estimating the power requirements of commercial crushers.
C. states that the work required to form particle of any size from very large feed is proportional to the square root of the volume to surface ratio of the product.
D. states that the work required for the crushing is proportional to the new surface created.

5. A centrifugal filtration unit operating at a rotational speed of w has inner surface of the liquid (density ?L) located at a radial distance R from the axis of rotation. The thickness of the liquid film is ? and no cake is formed. The initial pressure drop during filtration is
Options
A. ½w² . R² . ?L
B. ½w² . ?² . ?L
C. ½w² . ??L (2R + ?)
D. ½w² . R . ?L(R + 2?)

7. Pick out the correct statement.
Options
A. Angle of repose is always greater than the angle of slide.
B. A hopper is a small bin with a sloping bottom.
C. A silo is a short height vessel of very large diameter used for the storage of high volatile matter coal.
D. Pine oil is used as a 'modifying agent' (for activating or depressing the adsorption of filming agents) in froth floatation process.

8. To increase the speed of response of a pressure spring liquid or gas expansion thermometer, the clearance space between the thermometer bulb and the thermal well should not be filled with
Options
A. air
B. a metal powder or graphite
C. oil
D. mercury

10. Pick out the correct statement pertaining to catalytic cracking.
Options
A. With increase in the reactor pressure, octane number of gasoline decreases.
B. With increase in the reactor temperature, gasoline yield decreases for a given conversion.
C. Percentage conversion increases with increase in the catalyst to oil ratio.
D. all (a), (b) and (c).

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