List of practice Questions

Which of the following is not correct, when the collector base junction is reverse biased?
The electrical conductivity of pure semiconductor can be increased by
Phase variation with respect to frequency is given by \( \phi(\omega) = 2\omega^2 + \cos\omega \). Then, group delay of the system is
What is the primary function of an Electrostatic Precipitator (ESP)?
The LTI system is said to be initially relaxed system when
What is the purpose of a catalytic converter in vehicles?
The frequency response of LTI system is given by the Fourier Transform of the ____ of the system.
Which regulatory authority establishes the noise limits in industrial areas?
Which parameter is commonly measured to determine the biochemical oxygen demand (BOD) of wastewater?
Unilateral Z transform of x(n) is equivalent to bilateral Z-transform of
The permissible noise level in industrial areas in India is
Which process is commonly used in secondary treatment to break down organic matter?
Match the following with respect to region of convergence
\( x(n) \) ROC
AInfinite duration causal sequenceIEntire z-plane except at \( z = 0 \)
BFinite duration causal sequenceIIEntire z-plane except at \( z = \infty \)
CInfinite duration anticausal sequenceIII\( |z| > \alpha \), exterior of a circle of radius \( \alpha \)
DFinite duration anticausal sequenceIV\( |z| < \beta \), interior of a circle of radius \( \beta \)
What is the purpose of primary treatment in wastewater treatment plants?
Which of the following is not correct with respect to Z-transforms?
Which of the following method is not used in water purification systems?
The condition for orthogonality of two functions \( x_1(t) \) and \( x_2(t) \) in terms of correlation is
Consider a causal LTI system with impulse response \( h(t) = e^{-bt}u(t) \). Find the output of the system for an input \( x(t) = 3e^{-at}u(t) \).
The Fourier transform of the following signal is \[ x(t) = \begin{cases} 1+\cos \pi t & |t|<1 \\ 0 & |t|>1 \end{cases} \]
How does soil salinity affect plant growth?
Which of the following statement is not correct?
Which of the following is a key component of Cation Exchange Capacity of the soils?
The amplitude and phase spectrum of exponential Fourier Series about vertical axis respectively, is
The exponential Fourier series coefficient \( C_{-n} \) in terms of trigonometric Fourier coefficients is
Ozone is good