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MCQ
621. Overhead line-এ conductor হিসেবে ব্যবহার করা হয়-
aluminium
steel
copper
brass
ব্যাখ্যা: Aluminium-এর ওজন কম ও খরচ কম তাই এটি ব্যবহার হয়।
622. An OR function implemented in ladder logic uses
Normally-closed contacts in series
Normally-open contacts in series
A single normally-closed contact
Normally-open contacts in parallel
An OR function implemented in ladder logie. Uses Normally-Open contacts in parallel.
623. . From which of the following control system has feedback available?
Closed loop control system
Open loop control system
Both (a) & (b)
None of the above
Closed loop control system has feedback available.
624. 132kV Transmission line-এ কোন ধরনের অন্তরক ব্যবহৃত হয়?
Pin Type
Disc Type
Shackle Type
Pin Shackle
625. A good application for a timed interrupt in a PLC program would be-
A communications function block
A PID function block
A math function block
A motor start/stop rung
A good application for a toned interrupt in a PLC Program wouldbe A PID function black.
626. In a PLC, the scan time refers to the amount of time in which-
the technician enters the program
timers and counters are indexed by
one "rung" of ladder logic takes to complete
the entire program takes to execute
transmitted data communications must finish
PLC Scan Time is the time token by tye PLC to read the inputs. Solve the logic and update the output is called a PLC Scan Time. This time is measured in millisecond.
627. Transmission line-এর Sag কোন Factor-এর উপর নির্ভর করে?
Span length
Weight of the conductor
Tension of the conductor
সবগুলো
ব‍্যাখ্যা: যে-সকল ফ্যাক্টরের উপর স্যাগ নির্ভর করে সেগুলো হলো- (i) কন্ডাক্টরের ওজন, (ii) স্প্যানের দৈর্ঘ্য, (iii) কার্যকরী টান, (iv) তাপমাত্রা, (v) কন্ডাক্টরের ঝুলনে ঝড় ও বরফের প্রভাব ইত্যাদি।
628. The PLC is used in
machine tools
automated assembly equipment
moulding and extrusion machines
all of the above
The PLC is Used in machine tools, automated assembly equipment, moulding and extrusion machines.
629. What is the largest integer number that a PLC counter function can reach if it uses a 16-bit register?
32,768
65.535
65.536
65.537
The largest integer number that a PLC counter function can reach if it uses a 16 bit register is 65.535
630. From the following which control system is simple and cheap?
Closed loop control system
Open loop control system
Both (a) & (b)
None of the above
Open loop control system is a simple and cheap type of control system
631. Which of the following cannot be an input that is given to the PLC?
Manual switches
Relay
Sensors
None of the above
632. Current limiting reactors in power system have-
large resistance and low reactance
large reactance and low reactance
large reactance and resistance
low reactance and resistance
The current limiting reactor is an inductive reactances in comparison to their resistance is used for limiting short circuit currents during fault conditions. Current-voltage reactors also reduced the voltage disturbances on the rest of the system
633. The difference between online and offline PLC
programming is whether the PLC is running or stopped
whether the programming PC has internet connectivity
the type of programming cable used
where the edited program resides
The difference between online and offline Programming. Where the edited Program resides,
634. Delta সংযোগ লাইন ভোল্টেজ ১৭৩২ Volt হলে Phase Voltage কত হবে?
১৭৩.২ V
১৭৩২ V
১০০০ V
৩০০০ V
635. ---is a system which is used to direct, command or regulate itself or another system.
Control system
Open loop control system
Closed loop control system
None of the above
A control system manages, contmands, directs, regulates the behavior of other devices or rystos using Control loops. It can range from a single l heating controller using a thermostat controlling a domestic boiler to large industrial contro ryster which are used for controlling Processes or machines
636. Most World Wide Web pages contain commands in the language of-
NIH
HTML
URL
IRC
HTML- হলো একটি অত্যাধুনিক ইন্দ্র Browser. HTML-এর পূর্ণরূপ হলো- Hypertex Multiple Languages.
637. -is an automatic device that uses error signal to correct the performance of a mechanism.
Auto-mechanism
Servo mechanism
Servo control
None of the above
Servo control is an automatic device that uses error signal to correct the Performance of a mechanism .
638. Which of the following is a type of control system?
Closed loop control system
Open loop control system
Both (a) & (b)
None of the above
There are two common control loop systems Used in industrial Processes. They are the Open Loop system and the closed loop system.
639. PLC can be in plant to change the sequence of operation.
only programmed
only reprogrammed
programmed and reprogrammed
able to give a set point
No explanation is available for this question.
640. In PLC programming, a retentive function is one that-
Defaults to the "on" state
Comes last in the program
Cannot be edited or deleted
Is not reset after a power cycle
in PLC Programming, a retentine function is One that is not reset afier a Power loss.