ladder diagram
Description : Develop a ladder diagram for to control conveyor belt motor equipped with the: (i) Counter of item. (ii) Start & Stop functions. (iii) Change of direction function.
Last Answer : Forward: Reverse:
Description : Write the ladder program for 24 hour clock.
Last Answer : Ladder Program for 24 hour clock:
Description : List & explain the timer instruction of PLC. Draw the ladder diagram to verify (i) OR gate& (ii) NOR gate logic
Last Answer : Depending on the time delay and operation, there are two types of timers * PLC timer- (i) ON delay timer (ii) OFF delay timer Description (i) ON delay timer 1) This instruction counts time interval when ... a) OR gate ladder diagram y = A + B b)NOR gate ladder diagram
Description : Draw the block diagram of PLC.
Last Answer : Block diagram of PLC and input/output devices used for PLC Input/output devices - The input module has bank of terminals for physically connecting input devices, like push buttons, limit switches etc. ... is to translate signals from the PLC's CPU into a form that the output device can use.
Description : Draw block diagram of PID controller
Last Answer : Block diagram of PID Controller:
Description : Draw a block diagram of digital output module of PLC.
Last Answer : Block diagram of digital output module of PLC:
Description : Draw block diagram of proportional controller.
Last Answer : Block diagram of Proportional Controller:
Description : Drawthe PLC ladder diagram of ON-OFF control of lamp. Write the input and output devises.
Last Answer : Diagram:
Description : Draw construction of DC servomotor.
Last Answer : DC servomotor:
Description : Draw power and control circuit for definite time-limit starter for slip-ring induction motor. Explain its working.
Last Answer : Definite Time-limit Starter for Slip-ring Induction Motor: This starter is used for automatic control of acceleration of slip-ring induction motor at the time of starting. In this starter, the ... each phase, shorting the rotor winding terminals and final acceleration of the motor takes place.
Description : Explain count up (CTU) instruction with timing diagram.
Last Answer : The CTU is an instruction that counts false-to-true rung transitions. Rung transitions can be caused by events occurring in the program. When rung conditions for a CTU instruction have made a false-to-true ... of Counter up(CTU) Instruction: Too many uploads - please try again in an hour
Description : Develop power and control diagram for secondary frequency acceleration starter of slip ring induction motor.
Last Answer : Power and Control Circuit diagram for secondary frequency acceleration starter of slip ring induction motor:
Description : Explain pressure actuated switch with neat constructional diagram.
Last Answer : Pressure actuated switch: A pressure actuated switch is a device designed to monitor a process pressure and provide an output when a set pressure (setpoint) is reached. A pressure actuated switch does this by ... range spring (e.g. if the nt is turned clockwise the trip pressure will be higher).
Description : Explain concept of capacitive type proximity switch with neat schematic diagram.
Last Answer : Capacitive type proximity switch: A capacitive proximity switch is device that senses presence of metallic or nonmetallic objects. The internal circuit consists of an oscillator, threshold detection stage and ... in oscillation amplitude is detected and output switching device is turned on.
Description : What is observed (i) When a beam of light is pressed through a colloidal sol (ii) An electrolyte, NaCl is added to hydrated ferric oxide sol. (iii) Electric current is passed through colloidal sol.
Last Answer : Ans.: (i) Tyndal Effect (iv) Coagulation (v) Electrophoresis
Description : Regarding the illustrated electrical schematic, 'S1-P', 'S1-Q', and 'S1-R' represent ____________. EL-0016 A. capacitors B. normally-closed contacts C. normally-open contacts D. normally-closed pushbutton switches
Last Answer : Answer: C
Description : As part of a routine maintenance program for deck machinery, you should ___________. A. inspect electrical wiring and pushbutton switches for evidence of corrosion or burned insulation B. disassemble ... covers and ventilate as weather permits D. Check drum switch contact pressure every three months
Last Answer : Answer: A
Description : The pushbutton on the handset of a ship's sound-powered telephone must be depressed to ______________. A. talk then released to listen B. listen then released to talk C. both talk and listen D. ring the station being called
Description : Suppose a teacher has acute stammering problem but he wins the favour through sycophancy. Therefore, he goes to any extent to seek favour from the administration. The other colleagues have great jealousy ... D) You tell him the difference between right and wrong things, to enhance his moral courage
Last Answer : C) You will treat him as his best friend
Description : Does anybody know an easy way to draw your own electrical/electronic diagrams in ladder or schematic drawings on your computer?
Last Answer : here is some software that claims to allow you to draw your own circuits, it also claims to be free. however as i have never used it my self i cant say for sure.
Description : How To Write The Program For Single Push Button By Using Ladder Diagram?
Last Answer : 1. Create a Push button 2. Connect a Counter series to PB 3. Create a compare button 4. Initialize 1 at one end 5. Counter output in another 6. Connect the Coil which has to be energized 7. Initialize 2 at one end 8. Counter output in another 9. Connect the Coil which has to be reenergized.
Description : Develop a ladder diagram for Direct On Line (DOL) starter.
Last Answer : Direct On Line (DOL) starter
Description : ……… is a group of words or coded instruction for the NC/CNC system to execute aparticular movement. a.Sequence b.Address c.Code d.Block
Last Answer : d.Block
Description : Match the items given in column I with those in column II and select the correct option given below. Column I Column II A. Herbarium (i) It is a place having a collection of preserved plants and animals. B. Key (ii) A list that ... ii) (i) (iv) (c) (ii) (iv) (iii) (i) (d) (iii) (iv) (i) (ii)
Last Answer : (d) (iii) (iv) (i) (ii)
Description : Draw the power and control circuit diagram for forward — stop — Reverse type DOL starter for 3 phase induction motor.
Last Answer : Draw the power and control circuit diagram for forward — stop — Reverse type DOL starter for 3 phase induction motor.
Description : [Fluff time] You fall off a 12ft ladder which peril would be best to fall on or in?
Last Answer : Fire ant mound. The much lesser of all the other evils like impalement on the spiked gate,cut to ribbons on the glass table, the agony of having to have thorns and cactus needles extracted. Hit the fire ant mound and hopefully be able to sprint away fast.
Description : A boy fell off of a 100 foot ladder, but he did not get hurt. How is this possible? -Riddles
Last Answer : He was only on the first step.
Description : Not far off shore a ship stands with a rope ladder hanging over her side. The rope has 10 rungs. The distance between each rung is 12 inches. The lowest rung touches the water. The ocean is calm. ... hour. How soon will the water cover the third rung from the top rung of the rope ladder? -Riddles
Last Answer : When a problem deals with a physical phenonmenon, the phenonmenon should be considered as well as the numbers given. As the water rises, so does the rope ladder. The water will never cover the rung.
Description : Lights of different colours are arranged below in order of increasing wavelengths: 1. Violet, indigo, blue 2. Green, orange, red 3. Red, green, indigo 4. Blue, green, yellow Which of the above are in proper sequence? (a) 1 only (b) 1 and 2 (c) 2 and 3 (d) 1 and 4
Last Answer : Ans:(d)
Description : Match the following: NC code DefinitionP. M05 1. Absolute coordinate system Q. G01 2. Dwell R. G04 3. Spindle stop S. G09 4. Linear interpolation a.P-2, Q-3, R-4, S-1 b.P-3, Q-4, R-1, S-2 c.P-3, Q-4, R-2, S-1 d.P-4, Q-3, R-2, S-1
Last Answer : c.P-3, Q-4, R-2, S-1
Description : State the function of PLC memory w.r.t. types, speed of execution.
Last Answer : PLC memory cab be divided into two major types: 1) System memory: a) Executive Memory: The executive is a permanently stored collection of programs that are considered part of the system itself. ... RAM memory is fastest amongst all type of memory. Flash ROM memory is faster than ROM memory.
Description : Develop the control circuit for star-delta starter used for starting a 3 ∅ induction motor.
Last Answer : Control Circuit for Star-Delta Starter: 1) Automatic Star-Delta Starter: OR 2) Semi- automatic Star-Delta Starter:
Description : Give the full form of SCADA & HMI.
Last Answer : Full Form of SCADA and HMI: SCADA:-Supervisory Control and Data Acquisition HMI :- Human Machine Interface
Description : State the function of seal in circuit w.r.t. PLC.
Last Answer : Standard Start-Stop-Seal circuit: * The Start-Stop-Seal circuit is as shown in figure. The power circuit consists of 3ph load (Motor) connected by a main contactor (M) to 3-phase supply. The ... * When STOP is pressed, M gets de-energized and motor gets disconnected from supply.
Description : List types of timers.
Last Answer : Types of Timers: Retentive Timers: 1. ON Delay 2. OFF Delay Non Retentive Timers: 1. ON Delay 2. OFF Delay
Description : State the need of automation.
Last Answer : Need of Automation in Process : * To fulfill the demand of product at right time. * To reduce the human errors and involvement of human being in the process. * For better productivity. * For better ... of process. * For better quality. * For reducing man power. * For reducing cost of product.
Description : Explain UP counter instruction of PLC with suitable instruction.
Last Answer : The CTU is an instruction that counts false-to-true rung transitions. Rung transitions can be caused by events occurring in the program. When rung conditions for a CTU instruction have made a false-to-true ... accumulated count to zero. Counting can resume when rung 4 goes false again.
Description : Differentiate between two-wire and three-wire control
Last Answer : Two-Wire Control Three-Wire Control 1 The control component offers only two-wires for its connection in control circuit. The control components offer threewires for their connection in control ... using starter. The safe starting ensures the Novolt protection. 4
Description : List any two advantages and any two disadvantages of PLC.
Last Answer : Advantages of PLC: i) Increased productivity ii) Increased product quality iii) Increased flexibility and convertibility iv) Reduced manpower v) Reduced cost of product vi) Better inventory control vii) Increased ... v) PLCs are not very good at handling large amount of data, or complex data.
Description : Differentiate between power and control wiring
Last Answer : Power wiring Control wiring 1 Used for connecting load to main power supply through appropriate switchgear and protecting devices such as overload relay contacts Used for ... can be used for connecting control circuit as control circuit does not carry higher current.
Description : List types of memory. Explain any one type of memory in brief.
Last Answer : Types of Memories in PLC: i) Executive Memory ii) Scratch Pad Memory iii) Data Table a) Input image memory b) Output image Memory c) Internal bits/ registers/ words ... storage for programmed instructions entered by the user. The user program area also stores the control program.
Description : List any four names of optial sensors
Last Answer : Optial sensors: i) Photodiodes ii) Phototransistors iii) LDRs iv) Photovoltaic cells v) Optical encoder vi) Scintillation counter vii) Photoionization detector viii) Photographic plates
Description : State any two input and output devices of PLC
Last Answer : Input Devices of PLC: i) Selector switches ii) Push buttons iii) Binary encoders iv) Mechanical/magnetic Limit switches v) Inductive/ capacitive/optical proximity switches vi) Analog transducers ... /Lamps v) Solenoids vi) Continuous/ discrete valves vii)Analog/digital indicators/recorders etc.
Description : List any two ratings of digital input and digital output module each.
Last Answer : Ratings of Digital Input Module: i) Rated voltage & current: +24V DC at 4mA/120V AC at 6mA/230V AC at 9mA ii) Specified operational voltage range: 0-30V DC/ 264V AC. iii) Absolute maximum input voltage: + ... / 2A for relay type/0.5A AC vi) Rated current/common: 6A DC/8A for relay type/0.5A AC
Description : List applications of servomotor.
Last Answer : Applications of Servomotor: 1) Computers 2) Robotics and toys 3) CD/DVD players 4) Textile industries 5) Instrument servos 6) Tracking and guidance system 7) Self-balancing recorders 8 ... 9) Process controllers 10) Electromechanical actuators 11) Air-craft control system 12) Programming device
Description : (a) Draw a diagram depicting Human Alimentary Canal and label on it: Gall bladder, Liver and Pancreas. (b) State the roles of Liver and Pancreas. (c) Name the organ which performs the following functions in humans: (i) Absorption of digested food (ii) Absorption of water. -Biology
Last Answer : Answer.(a) (b) Liver: It synthesize and store bile juice secreted by gall bladder which breaks down fats into fat globules. (c) The organ which performs the following functions in humans are as ... * (i) Absorption of digested food - Small intestine. (ii)Absorption of water - Large intestine.
Description : (a) Draw a diagram of human respiratory system and label the following: (i) part where air is filtered by fine hair and mucus (ii) part which terminates in balloon - like structures (iii) ... (b) Why is the rate of breathing in aquatic organisms much faster than in terrestrial organisms? -Biology
Last Answer : (a) (b) Quantity of dissolved oxygen is fairly low in water as compared to the amount of oxygen in air. Aquatic organisms therefore have to breath faster than terrestrial organisms to absorb the required amount of oxygen from the water.
Description : (a) Draw a diagram to show open stomatal pore and label on it: (i) guard cells (ii) chloroplast (b) State two functions of stomata. (c) How do guard cells regulate the opening and closing of stomatal pore? -Biology
Last Answer : (a) (b) Two functions of stomata are: (i) Exchange of gases between the plant and the atmosphere takes place through stomata. (ii)Transpiration in plants takes place through stomata. ( ... through these stomata, the plant closes these pores when it does not require carbon dioxide for photosynthesis.
Description : Draw the ray diagram in each case to show the position and nature of the image formed when the object is placed: (i) at the centre of curvature of a concave mirror (ii) between the pole P and focus F of ... front of a convex mirror (iv) at 2F of a convex lens (v) in front of a concave lens -Physics
Last Answer : Answer. Nature of image: Real, inverted and same size image is formed at the centre of curvature. Nature of image: Virtual, enlarged and erect image is formed behind the mirror. Nature of image: Virtual ... : Virtual, erect and diminished image is formed between O and F on the same side of object.
Description : (i) Draw a labelled diagram of the human female reproductive system. (ii) Enumerate the events in the ovary of a human female during (b) Luteal phase of menstrual cycle (a) Follicular phase -Biology
Last Answer : (i)Refer to page no. 43. (2) (ii) (a) Follicular phase The primary follicle in the ovary grow to become fully mature Graafian follicle. Endometrium gets thickened. The ... Luteal phase The remaining parts of ruptured Graafian follicle transforms into corpus luteum, that secretes progesterone.