GOVERMENT POLYTECHNIC GANDHINAGAR
ELELCTRICAL
IMP QUSTIONS FOR MCA
Subject: MICROPROCESSOR AND CONTROLLER APPLICATIONS
1. What is Bus? What are the various types of buses in 8085?
2. Explain construction and working of AC techogenerator.
3. Compare PI, PD and PID controller with the help of characteristics.
4. Explain the working of Stack pointer and ALU in details in 8085.
5. Draw pin diagram 0f 8085.
6. Explain different types of data transfer techniques.
7. Explain flags of 8085.
8. Explain different operating modes of 8255A.
9. What is decoder? Draw and explain 3 to 8 decoder.
10.Draw architecture of PLC in details. Write any three advantages of PLC.
11.Compare Microprocessor and Microcontroller.
12.Write functions of SCADA.
13.Draw and explain the internal architecture of 8085.
14.What are SFRs in 8051? Explain their utility.
15.Explain the Instructions :(1) MVIB, 25h (2) ADC C (3) LDA 6000h (4) INX H.
(5) ADI 8bit data
(6) ACI 8 bit data (7) MOV A , B (8) MOV M,A.
16.Compare open loop and closed loop control.
17.Explain ON-OFF type controller.
18.State advantages of control system.
19.State the features of stepper motor.
20.Explain Temperature control of Furnace by microprocessor.
21.Short note on ports of 8051.
22.Explain brief internal memory and external memory in reference to 8051.
23.Explain three parts of 8051 internal RAM.
24.State and explain the addressing modes of 8085.
25.Explain the Classification of instruction set of 8085 Microprocessor.
26.What is the role of timing and control section in Microprocessor?
27.Explain voltage regulator of a D. C. generator.
28.Explain working of synchro as transmitter and receiver in position control
system.
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29.Explain d.c. position control system using d.c. servo motors.
30.Explain microprocessor based firing angle control of SCR.
31.Draw Architecture of PLC in detail. Give advantages and disadvantages of
PLC
32.Draw the block diagram of closed loop control system and explain
function of each block.
33.What is interrupt? List the interrupt pins.
34.What is the role of timing and control section in 8085?
35.What is techogenerator? Give requirements of a good techogenerator.
36.Give and explain control word format of 8255A.
37.Draw the architecture of 8051 and state its main characteristics.
38.Draw the Block diagram of SCADA syst
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