Hello friends, Today I am going to introduce one such person from India, whom people all over the world know him as the Mathematician of India . One of the famous Mathematicians of India named Ramanujan . Whenever I read about them, my chest widens with pride because he was one of the great people who belonged to my beloved country. So let's know some things related to his life. This story is based on a true incident.Dates back to the early 20th century. This was a period when the British rule over Indians. Ramanujan , living in Madras, India, did not write or read any good family. Ramanujan's full name was Srinivasa Linger Ramanujan . He was very interested in mathematics. He used to write maths questions on the furs of temples every day and solve those questions. But she was looking for a good job that could take care of the people in her home country. Ramanujan was also married at that time. In order to earn money, he goes to a high-ranking English officer, ...
Who is the founder of Haryanka Dynasty?
A Ajatashatru
B.
C.
D.
Answer:
The revolutionary like Ashfaqullah Khan, Chandra Shekhar Azad, Ram Prasad Bismil, Roshan Singh and Rajendra Lahiri were all associated with :
A. The Kakori Conspiracy case (1925)
B. 1857 Revolt
C. Chauri Chaura Case
D. The Jallianwala Bagh massacre
Answer: Option A
The Moplah Rebellion in 1921 in Malabar was Muslim Peasants Rabellion against :
A. Muslim Land Holders
B. The British Government Authority
C. The non-tribal outsiders
D. Hindu Land Holders
Answer: Option D
The Rowlatt Act was passed in :
A. 1905
B. 1913
C. 1919
D. 1925
Answer: Option C
Mahatma Gandhi launched Kheda Satyagrah on Gujrat in 1918 to support the cause of :
A. Mill Owners
B. Land Lords
C. The peasants
D. Kol Rebellion
Answer: Option C
The painting of automobiles is done to
(B)
(C)
(D)
Answer: Option D
The calorific value of petrol is about
(B) 39.4-42.5 MJ/kg
(C) 42.7-43.5 MJ/kg
(D) 45.5-47 MJ/kg
Answer: Option C
The coefficient of friction for the clutch facing is approximately
(B) 0.4
(C) 0.8
(D) 1.2
Answer: Option B
The air resistance to a car at 20 kmph is R. The air resistance at 40 kmph will be
(B) 2R
(C) 4R
(D) 4R²
Answer: Option C
(B) Length of the connecting rod
(C) Internal diameter of the cylinder
(D) Distance between T.D.C. and B.D.C.
Answer: Option D
Which of the following is/are characteristic/s of mechatronic products and systems?
a. Functional interaction between mechanical, electronic and information technologies
b. Spacial interaction of subsystems in one physical unit
c. Intelligence related to the control functions of the mechatronics system
d. All of the above
ANSWER: All of the above | ||
The acronym PLC stands for:
(A) Pressure Load Control
(B) Programmable Logic Controller
(C) Pneumatic Logic Capstan
(D) PID Loop Controller
(E) Pressure Loss Chamber
Answer : B
Ladder logic programming consists primarily of:
(A) Virtual relay contacts and coils
(B) Logic gate symbols with connecting lines
(C) Function blocks with connecting lines
(D) Text-based code
(E) Hieroglyphics
Answer : A
In a PLC, the scan time refers to the amount of time in which …..
(A) the technician enters the program
(B) timers and counters are indexed by
(C) one “rung” of ladder logic takes to complete
(D) the entire program takes to execute
(E) transmitted data communications must finish
Answer : D
Identify the problem in this motor control PLC program:
(A) Coil
(B) Start contact
(C) Seal-in contact
(D) Stop contact
(E) Power source
Answer : C
The Boolean representation of this PLC program is:
(A) ABC + D
(B) C + (A + B)D
(C) C + D(A + B)
(D) ABC + BD
(E) C(AB + D)
Answer : E
The difference between online and offline PLC programming is . . .
(A) whether the PLC is running or stopped
(B) whether the programming PC has internet connectivity
(C) the type of programming cable used
(D) where the edited program resides
(E) the type of programmer used
Answer : D
In PLC programming, a retentive function is one that:
(A) Defaults to the “on” state
(B) Comes last in the program
(C) Defaults to the “off” state
(D) Cannot be edited or deleted
(E) Is not reset after a power cycle
Answer : E
What is the largest integer number that a PLC counter function can reach if it uses a 16 bit register?
(A) 32,768
(B) 65,535
(C) 65,536
(D) 65,537
(E) 32,767
Answer : B
An OR function implemented in ladder logic uses:
(A) Normally-closed contacts in series
(B) Normally-open contacts in series
(C) A single normally-closed contact
(D) Normally-open contacts in parallel
(E) Normally-closed contacts in parallel
Answer : D
A good application for a timed interrupt in a PLC program would be:
(A) A communications function block
(B) A PID function block
(C) A math function block
(D) A motor start/stop rung
(E) A “watchdog” timer
Answer : B
The PLC was invented by.
a) Bill Gates
b) Dick Morley
c) Bill Landis
d) Tod Cunningham
The first company to build PLCs was .
a) General Motors
b) Allen Bradley
c) Square D
d) Modicon
Classify the following as automatic control, manual control, discrete control or continuous control.
a) A sensor is used to turn on and off the lights of a room.
b) A temperature sensor is used to adjust the room temperature and maintain it at a set point.
c) A user starts the bottle filling machine, places the bottle on the conveyor belt to fill it with the required liquid.
d) The luggage system at the airport.
e) A factory that makes red pens and has no human employees.
Answer :
The part that monitors the inputs and makes decisions in a PLC is the CPU.
a. True
b. False
c. None of the above
One of the following is an input device
a. Motor
b. Light
c. Valve
d. Sensor
Which one of the following is not a PLC manufacturer
a. Siemens
b. Mitsubishi
c. Microsoft
d. ABB
Solenoids, lamps, motors are connected to:
a. Analog output
b. Digital output
c. Analog input
d. Digital input
In a PLC “I” is used for output and “Q” is used for input
a. True
b. False
c. None of the above
PLC stands for programmable logo controller
a. True
b. False
c. None of the above
To increase the number of inputs and outputs of the PLC, one can use expansion modules.
a. True
b. False
c. None of the above
An example of discrete (digital) control is:
a. Varying the volume of a music system
b. Turning a lamp ON or OFF
c. Varying the brightness of a lamp
d. Controlling the speed of a fan
A solenoid is an example of an output device.
a. True
b. False
c. None of the above
Which of the following statements is not correct?
a) The PLC rung output [-( )-] is a discrete output instruction or bit in memory.
b) Each rung of the ladder logic represents a logical statement executed in software – inputs on the right and outputs on the left.
c) Input and output instructions in ladder logic do not directly represent the switches and actuators.
d) PLC input instructions are logical symbols associated with voltage at the input module terminals.
Which of the following statements is correct?
a) Ladder logic is a PLC graphical programming technique introduced in the last 10 years.
b) A ladder logic program is hard to analyze because it is totally different when compared with the equivalent relay logic solution.
c) The number of ladder logic virtual relays and input and output instructions is limited only by memory size.
d) The number of contacts for a mechanical relay is limited to number of coils on the relay.
15. Which of the following statements is NOT correct?
a) The status of each input can be checked from one location and outputs can be forced on and off.
b) All symbols in the RLL represent actual components and contacts present in the control system.
c) PLCs are not as reliable as electromechanical relays in RLL.
d) Input (-| |-) and output (- ( ) -) instruction symbols in the ladder logic represent only data values stored in PLC memory.
Which of the following statements is NOT correct?
a) If a problem in a PLC module occurs, the module can be changed in a matter of minutes without any changes in wiring.
b) Outputs can be paralleled on the same rung.
c) The physical wires between the input and output field devices and the PLC input and output modules are the only signal wires required in the PLC system.
d) The cost and size of PLCs have increased significantly in the last 10 years.
17. Which of the following statements about a single pole double throw relay is NOT true?
a) It is called an SPDT type of relay.
b) It has one common contact.
c) It has two positions (NC and NO).
d) It has a center off position.
Which of the following statements about a single pole double throw relay is true?
a) Insulators are used in the armature to isolate the electrical switching contacts from the rest of the relay components.
b) The NC contact and the pole are in contact when the relay is off.
c) It has just one coil.
d) All of the above.
Which of the following statements about RLL is NOT true?
a) NO contact symbol has two parallel lines to indicate an open contact.
b) RLL stands for Relay Ladder Logic.
c) NC contact symbol has the same two parallel lines with a line across them to indicate closed contacts.
d) The right power rail is positive or the high side of the source, and the left power rail is the power return or ground.
The _____ is moved toward the relay electromagnet when the relay is on.
a) Armature
b) Coil
c) NO contact
d) NC contact
When a relay is NOT energized:
a) There is an electrical path through the NO contacts
b) There is an electrical path through the NC contacts
c) Neither the NO or the NC contacts have an electrical path
d) Both the NO and the NC contacts have an electrical path
Which of the following RLL applications is not normally performed in early automation systems?
a) On/off control of field devices
b) Logical control of discrete devices
c) On/off control of motor starters
d) Proportional control of field devices
Current flows into the _____
a) Input terminal of a sinking DC input module
b) Input terminal of a sinking output field device
c) Output terminal of a sinking input field device
d) All of the above
In a current sinking DC input module _____
a) The current flows out of the input field device
b) Requires that AC sources be used with mechanical switches
c) The current flows out of the input module
d) Currents can flow in either direction at the input module
AC output field devices can interface to _____
a) AC output modules
b) Relay output modules
c) Both a and b
d) Neither a or b
What one item in the output module circuit above should be changed to make it correct.
a) The battery polarity
b) Output module should be sourcing
c) Field device should be sinking
d) Current flow direction
What one item in the input module circuit above should be changed to make it correct.
a) The battery polarity
b) Input module should be sinking
c) Field device should be sinking
d) Current flow direction
When _____ contacts are actuated, they disrupt the power supply through them.
a. normally open type
b. normally closed type
c. both a. and b.
d. none of the above
The type of memory which is fast and temporarily stores the data which are immediately required for use is called as______.
a. HDD
b. ROM
c. RAM
d. SSD
How is the speed of operation of conventional relay system as compared to digital controllers?
a. very slow
b. very fast
c. same
d. almost similar
The capability of convention relay systems for complex operations is ____ that of the PLCs
a. poor than
b. excellent than
c. as good as
d. unpredictable as
How is the noise immunity of PLCs to electrical noises as compared to that of conventional relay controllers?
a. poor
b. excellent
c. as good as noise immunity of conventional relay controllers
d. unpredictable
_____ of PLCs can be done in very little time.
a. Programming
b. Installation
c. Commissioning
d. All of the above
PLC can be _____ in plant to change the sequence of operation.
a. only programmed
b. only reprogrammed
c. programmed and reprogrammed
d. able to give a set point
The PLC is used in _______.
a. machine tools
b. automated assembly equipment
c. moulding and extrusion machines
d. all of the above
Which of the following can be the output of PLC?
1. Relay coils
2. Solenoids
3. Indicators
4. Motors
5. Lamps
6. Alarms
Select correct option
a. Only (1), (2), (3) and (4)
b. Only (3), (4), (5) and (6)
c. Only (1), (2), (3) and (5)
d. All the (1), (2), (3), (4), (5), and (6)
Which of the following cannot be an input that is given to the PLC?
a. Manual switches
b. Relays c. Sensors
d. None of the above
How does a Stepper Motor move ?
A. Electrical Pulse
B. Continuous Applied Voltage
C. Alternates from A and B
A pulse can be produce by which means ?
A. Microprocessor
B. Timing Logic
C. Toggle Switch
D. All of the above
Which of the following is not a type of stepper motor?
A. Variable Reluctance
B. Hybrid
C. Magnetic
D. Lead-Screw
Which of the following is not a component of a stepper motor?
A. Windings
B. Rotor and Stator
C. Commutator
D. Brush
E. Both C and D
What is the difference between full-step and half-step?
A. In full-step two phases are on and in half-step only one phase is on.
B. More resonance is evident in half-step
C. More power required for full-step
D. Half-step offers better resolution
What criteria’s are necessary to consider when selecting a stepper motor?
A. Mechanical Motion.
B. Inertial Load
C. Speed Requirements
D. All of the above
Which of the following is NOT an advantage of stepper motors?
A. Cost-efficient
B. Maintenance-free
C. No feedback
D. More complex circuitry
With a stator having 8 teeth and a rotor having 6 teeth, what step angle will an application be able to achieve?
A. 15°
B. 51°
C. 20°
D. 105°
If an application using a stepper motor required feedback, which device would be needed to accomplish this?
A. Counter
B. Encoder
C. Linear Guide
D. Commutator
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