EMPS101 Sample Test Questions 8

a.8.) A robot can use a back-pressure sensor to (a) measure the intensity of visible light. (b) regulate the torque produced by an electric drill. (c) determine the orientation of magnetic lines of flux. (d) regulate the output of an acoustic transducer. OIQUA OMA BOITZUODA a.9.) When you apply AF voltage to the plates of an electrostatic transducer, the electric field between the plates fluctuates in intensity, causing 01 903 900 ben ud! 1 joneupent oibus riw 16 limst amosa (a) a magnetic field that moves the coil, producing sound waves. (b) the capacitance to vary, thereby generating a phase shift. to assivab terw miw silimet emoce8 (c) forces that move the flexible plate, producing sound waves. (d) the plates to charge and discharge, producing AF current. to becogmos al meraya a.10.) Which of the following devices is a form of RF transducer? (a) A small loop antenna (b) A back-pressure sensor (c) An elastomer far al venibrantxe b (d) An epipolar navigation sensor

#4   What’s Control Machine Feedback? What are its features?

Q1. Figure 1 shows an asynchronous state machine. a) Derive the excitation equation for Y and draw the excitation table circling the stable states. b) Derive and draw the transition map. c) Draw the state diagram for the asynchronous machine, clearly indicating on the diagram the states and the output associated with each transition. A B- D Figure 1. Asynchronous state machine. Y

Explain the concept of motherboard power phases and voltage regulation modules (VRMs). How do they impact the stability and overclocking potential of a computer system?

Manual Control: Design a dc motor circuit to drive an assembly line consisting of a conveyor belt moving horizontally. The load on the belt varies depending on the number of goods being moved. The load torque seen by the motor varies from a maximum of 20 Nm to a minimum of 5 Nm. At all loading conditions, the speed of the motor must be maintained constant and equal to 150 rpm. a. To achieve the required operation, the armature voltage of the motor is adjusted by a single-phase, full-wave, ac/dc converter. The input voltage and frequency to the converter are 240 V (rms) and 50 Hz.   (Hint: Motor type, Motor rating, α range, Supply voltage, and frequency...etc)   Automatic Control:    Modify the design to automatically adjust the voltage to maintain the speed equal to 200 rpm within the specified torque range.   (Hint: control variable, controller type, connection, controller weights..etc)

Discuss the concept of linearization and why it is essential in control system design.

q8

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How do electrical engineers design and implement control systems for various applications, such as manufacturing, robotics, or transportation?

Solve correctly please. Will give ratings If correct!

DISCUSSION: 1. What do you mean by rise time? Derive its expression for a unity feedback 2nd order control system. 2. Why is less overshoot desired for practical systems?

The armature of an 8 -pole dc machine has 72 slots, and its diameter is48 cm. Find the pole pitch in )a) electrical degrees, (b) electrical radians, and (c)number of slots. Also find

With a labelled diagram of any DC machine  Discuss it parts

Solve it fast fast plz

Q4/ Chose the correct answer for the following 1. In BLDC motor field winding is kept on a) Stator b) Rotor c) Can be placed anywhere d) Absent 2. By electronic circuitry BLDC can be controlled for both constant and variable torque operation. a) True b) False 3. In medical fields which DC motor is widely used? a) PMDC b) BLDC 4. Construction of BLDC is exactly similar to the a) Conventional DC motor c) Permanent magnet synchronous motor b) Induction motor 5. Typical brushless motor doesn't have a) Commutator b) Permanent magnet 6. The sensor most commonly used in the BLDC motor is a) Thermo Sensor b) Relay Sensor c) Brushed DC motor d) Cannot be determined d) Totally different construction c) Electronic controller d) Fixed armature c) Hall Sensor d) Power Sensor

Permanent magnet moving coil (PMMC): Select one: a. a moving coil & a pair of permanent magnets used basically for DC measurements. b. none of the given answers. C. a moving coil & a pair of permanent magnets used basically for AC measurements. d. a moving coil & a pair of permanent magnets used basically for DC and AC measuremnents.

How do traction inverters control the power delivery from the battery to the electric motor in an electric vehicle? What strategies are used to optimize efficiency and torque control?

Which machine the following equation is describing? Vs = Ris + V₁ + Vc A. Series RLC circuit B. Separately excited DC motor C. Permanent magnet DC motor

Electrical engineering DC machine

a) With neat diagrams, explain the development and effects of armature reaction in an alternator. b) Briefly explain the open-circuit characteristics and short-circuit characteristics of an alternator to determine voltage regulation. c) What is regenerative braking and how does it work in electric or hybrid cars?

DA stamping device is used for work on sheet metal work piece. The puncher that moved by double acting cylinder (DAC- A) with sp stamp the sheet metal and lefur retracted back to its position. While the sheet metal inside the blank will push out using another DAC- B and retracted back with Spring return ) Design an Pneumatic-PLC circuit by using 5/2 way valve.

What is CAN (Controller Area Network) and its significance in automotive applications?

1.a. In a DC servo motor system, the tachometer feeds back a voltage that’s proportional to motor speed.Where does this voltage go to?A. The interpolator cardB. The CPU in the main controllerC. The driverD. The axis logic card1.b. A type of feedback device that uses a rotor and senses the position of the motor by means of sine andcosine waveforms is called a/anA. tachometer.B. encoder.C. resolver.D. alternator.

What is Adaptive control system? If the process characteristics are notwell known then what type of scheme you would suggest explain in detail thescheme and write its merits and demerits.

Q4