Tricky MATLAB Questions and Answers on “Simulation – 2”.
1. What does the following toolbox do?
Simulink Control Design
a) Plots bode plots
b) Verifies circuit modelling
c) Calculates z transform
d) Calculates Fourier transform
Answer: a
Clarification: The above toolbox is used for the analysis of the system and check the control system parameters which gives an insight into the nature of working and stability of the system that has been modelled.
2. What does the following block show?
a) The maximum value of a signal
b) The minimum value of a signal
c) The final value of a signal
d) The rms of a signal
Answer: a
Clarification: The above block is configured to view the final value of a signal after simulation. It helps to identify the final value but only up to the time for which the model is getting simulated.
3. What does the following block do?
a) Add a AC value to the input
b) Add a DC value to the signal
c) Add a noise to the signal
d) Add a white noise to the signal
Answer: b
Clarification: The Bias block is used to add a bias signal to any signal. This essentially means adding a DC value to the input i.e. if the input signal is a sinusoid, it’ll start from the given Bias or D.C. value at t=0.
4. What does the following block do?
a) Add a delay to the signal in frequency domain
b) Advance the signal in frequency domain
c) Shifts the signal in frequency domain
d) Gives an output as the function of the input
Answer: d
Clarification: The above mathfunction takes an input and ends up giving an output according to the given input and the user-chosen function. It does not multiply the input with function so it really isn’t doing anything mentioned in the rest of the options.
5. What is the name of the given block?
a) z-domain
b) Laplacian domain
c) Fourier domain
d) no domain
Answer: b
Clarification: The s domain is referred to the Laplacian domain. The z-domain has a separate block. Hence, only laplacian domain is correct.
6. Simulink allows the simulation of systems using block diagrams.
a) True
b) False
Answer: a
Clarification: The Simulink allows the user to set up blocks which represent functions and can be used to model a system. Hence, the above statement is true.
7. What is the function of the following block?
a) Gives a 1 if the input is negative
b) Gives a 0 if input is negative
c) Gives a 1 if input is positive
d) Gives a 0 if input is positive
Answer: c
Clarification: The above block gives a 1 if the input is positive and a -1 if the input is negative.
8. What are the transistors present in Simulink?
a) BC-547
b) IN3914
c) No transistor
d) User defined
Answer: d
Clarification: The datasheet of any transistor can be specified in the transistor model. Hence, only option User defined is correct.
9. How many sinusoids can this block generate simultaneously?
a) Only 1
b) Multiple
c) Only 1 at high frequency
d) Multiple with multiple frequency
