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1. Describe briefly the spectral characteristics of the followi ng detectors and explain the reasons for their particular spectral response shape.
(a) InSb photovoltaic detector
(b) Bol ometer
(c) Quantum \Yell in tersubband photodetector 2. Consider a hypothetical IlgCdTe photodiode with an active area of 500 µmx SOO tm, R0=500 Mn, quantu m efficiency=0.6 operati ng at 80 K. Calculate the device specific dctecti vity at 8 µm \vavclcngth. 3. List a few advantages and disadvantages of photovoltaic and photocond uctivc detectors.
Calculate the theoretical stages needed to separate a 10 mole% ethanol liquid saturated feed into a 80 mole% distillate and a 0.1 mole% bottoms at 1 atmosphere pressure.
Of the three imaging axes, which are actively controlled and which are passively sensed?
List out the different biological process involving acids and bases with relevant equations and in adverse conditions how is the pH level maintained in biological systems?
determine the standard rate of return on the investment.
A distillation column separates benzene from toluene using a control scheme similar to that shown in Figure (a). Make a practice HAZOP study of the plant section and add any instrumentation that is needed to develop the full P and I diagram.
Compute the power factor for zero voltage regulation on full load.
Use the truncated virial equation along with the second virial coefficient calculated above to estimate the volume of water at 200 °C, 14 bar. How does this value compare with the volume obtained from the steam tables? Discuss this comparison.
Write balanced equations for the combustion of each component of the fuel gas - Explain the need for excess air.
The chemical reactor shown below has a cover (called a head) that is held in place by a series of bolts. The head is made of stainless steel (SG = 8.0), is 3 in. thick, has a diameter of 24 in., and covers and seals an opening 20in. in diameter.
Draw a block diagram to show the negative feedback mechanisms that help regulate glucose levels in the blood. Label the inputs, sensors, integrators, effectors, and outputs.
how much new capital must be supplied to make the purchase?
Assuming that there are no other significant side reactions, calculate masses of alcohol and ether produced, per 1000 kg of allyl chloride fed to the reactor.
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