UPPCL JE Electrical PLC,SCADA, Microcontrollers Important MCQ PDF 3
1.____ is a chip that is dependent on other chips for many functions.
2.With the increase in cost of preventive maintenance, the breakdown maintenance cost will ______.
B. Increases at a faster rate
C. No change
3.In PLC Programming, a retentive function is one that:
A. Cannot be edited or deleted
B. Is not reset after a power loss
C. Default points to OFF State
D. Default points to ON State
4.The function chart system of programming was originally developed in
A. South America
C. North America
5.Which of the following is not a PLC manufacturer?
B. ALLEN BRADLEY
6.____ is a single chip micro computer that has everything in-built.
C. Logic gates
7.Which of the following are the two 16 bit SFRs of Microcontroller 8051?
A. PC, DPTR
B. SP, PSW
C. SP, DPTR
D. PC, SP
8.OPC interfacing standard was developed during the years of
9.From the following which is the advantage of PLC SCADA system.
A. Data can be viewed from any where
B. Possible to connect thousands of sensors
C. Data can be display in any way
D. All of above
10.Which of the following condition takes place when the Microcontroller 8051 is reset
A. SP=08H, P1= 00H, RS0= 1, RS1= 1
B. SP=07H, P1= 00H, RS0= 0, RS1= 0
C. SP=08H, P1= FFH, RS0= 0, RS1= 0
D. SP=07H, P1= FFH, RS0= 0, RS1= 0
11.Which of the following MOV instructions of Microcontroller 8051 will show an error, i.e. Instruction is not valid?
A. MOV 80H, 82H
B. MOV 80H, 90H
C. MOV 80H, 88H
D. MOV 80H, 92H
12.From the following which is not a type of Micro Controller
A. 2 – bit Micro Controller
B. 4 – bit Micro Controller
C. 8 – bit Micro Controller
D. 16 – bit Micro Controller
13.For which of the following instructions are 9-bits involved in the rotation
A. RR A
B. RL A
C. RRC A
D. SWAP A
14.In a PLC, which of the following is NOT a subpart of Central Processing Unit (CPU)
D. Power supply
15.In flowchart representation, which of the following symbols indicates input/output?