Principles of Machine Shop Practice
Q: What Is CNC Machining? How does it work?
A: CNC Machining It is basically a metal fabrication method where a pre-written code is utilized to…
Q: Q1.Write the construction and working principle of DC Machines.
A: Electrical machines can be either generator or motors. They can be either Ac machines or DC…
Q: The armature reaction of DC machines is less under no load condition. Select one: O True O False
A: Armature reaction is the effect of armature fluxon the main field flux. Armature flux is due to…
Q: 2. A 25 kW shunt machine having an Armature circuit Resistance of 0.4 2 and a filed resistance of…
A: In this dc machine is given..We have to find out efficiency when machine acts as generator and…
Q: Draw the DC Machine and label its parts Example. Armature Winding Stator Pole Shoe/ Face Field…
A: DC Machine An electrical device that transforms electrical energy into mechanical energy is a DC…
Q: A common dc machine has a total core loss of 6000 W when operating at rated speed and excitation. A…
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Q: ← Introduction to Control... The maximum a transformer temperature rise of is 50°C. It attains a…
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Q: 2- At no-load the power input to transformer equal to 3- The value of resistance between primary and…
A: Note:- as per our company guidelines we are supposed to answer only first three subparts in case of…
Q: 1-Which of the following statements INCORRECTLY explain the label in the figure about LVDT working…
A: 1) Lvdt is an pssive transducers which is usdd for linear displacement measurement. It consists of…
Q: QI (iii) What is a d.c. machine? Define following Speed (1) Torque (ii) terms related to d.c.…
A: To find: To brief on D.C. machine and to define the following terms which are related to D.C.…
Q: h a labelled diagram of any DC machine Discuss it part
A: A self-excited DC shunt motor, also known as a shunt wound DC motor, is a form of self-excited DC…
Q: A thicker wire is used in the DC series field winding than DC shunt field winding in DC machines. *…
A: current carrying capacity of wire is directly proportional to area of wire. i.e. thicker the wire ,…
Q: Mechanical losses represent: A. Windage losses B. None of the other choices are correct O C. Losses…
A: In this answer let us try to understand what are mechanical losses as explained below.
Q: The advantage of . .is that it protects the entire machine from dust and *.dirt. It also provides ..…
A: Each machine contains two separate terminals one is the stator part and the other is the rotor part.…
Q: 1.) a)Determine the type of DC Machine that can be utilized in traction purposes and locomotives on…
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Q: Explain the Commutation process in DC machines.
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Q: The brushes of DC machines are usually made of and are in the shape of rectangular block. Select…
A: Brushes of dc machine are made of corbon graphite .and these are in rectangular shape.
Q: Following data are obtained by slip test on a salient pole machine: Idmax = 10 A 'dmin = 6.5 A…
A: Given- Slip test on a salient pole machine- Idmax=10 AIdmin=6.5 AVdmax=30 VVdmin=25 V To Find- The…
Q: 16. Which one of the following d-c machine losses is determined by applying a standard value rather…
A: It is impossible to have an efficiency of more than one or a percentage of an efficiency greater…
Q: Asap, select the best answer In dc machine, which among the parts converts the AC voltage into its…
A: In this question, We need to choose the correct options In dc machine, which among the parts…
Q: 5. In relation to a compound d.c machine, choose the right statement from the following. (A) The…
A: The objective is to find the correct statements.
Q: 2. Explain the action of differential and cumulative compounding in D.C machine.
A: Differential compounding : When the series winding of the dc machine is connected in such way that…
Q: 2. A 15 kW shunt machine having an Armature circuit Resistance of 0.35 and a filed resistance of…
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Q: Have a compensating winding in real machine means?
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Q: A 220 V dc machine has an armature resistance of 1ohm if the full load current is 20 A, the…
A: Armature induced EMF=Terminal voltage ± drop in armature resistance drop in armature…
Q: Get the electromechanical analog model (torque-voltage or torque-current) of the system. With all…
A: Step 1:Γ=kΘ+BΘ'+JΘ''is equation of Rotational mechanical system. Where Tau = Torque,J =Moment of…
Q: Explain the working operation of the transformer in a microwave oven. Sketch a circuit diagram in…
A: The working operation of the transformer in a microwave oven: At the point when the magnetron of the…
Q: Please discuss the potential risks of the electrical machines to the environment and the important…
A: Please discuss the potential risks of the electrical machines to the environment and the important…
Q: Electrical Engineering Dep. Electrical Machine Lal NO LOAD CHARACTERISTIC OF DC MOTORS DISCUSSION 1-…
A: DC MOTORMotor works on the side of excitation which is the side of excitation electrical when…
Q: Draw the DC Machine and label its parts
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Q: A 20 kVA machine has a full load copper loss of 400 W, an iron loss of 150 W, and a mechanical loss…
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Q: The resistance of the field winding(copper wire) of a DC machine is 0.25 ohm at 25°C. When operating…
A: In this question we need to find a resistance of the field winding at full load.
Q: A DC shunt machine while running as generator develops a voltage of 250 V at 1000 r.p.m. on no-load.…
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Principles of Machine Shop Practice
Step by step
Solved in 2 steps
- With a labelled diagram of any DC machine Discuss it partsThe resistance of the field winding(copper wire) of a DC machine is 0.25 ohm at 25°C. When operating at full-load, the temperature of the winding is 75 °C. The temperature coefficient of resistance of copper is 0.00427 per °C at 0°C. Find the resistance of the field winding at full-load.A thicker wire is used in the DC series field winding than DC shunt field winding in DC machines. * O because it carries the load current. O to prevent mechanical vibrations. O to provide strength. O to produce large flux. The speed of a DC motor can be changed by varying - armature resistance circuit O flux per pole O voltage source O all of above
- A 220 V dc machine has an armature resistance of 1ohm if the full load current is 20 A, the difference of induced voltage, when the machine is running as a motor and generator, is *Draw the DC Machine and label its parts Example. Armature Winding Stator Pole Shoe/Face Field Winding Brush Armature Core Bearing Shaft Commutator1.) a)Determine the type of DC Machine that can be utilized in traction purposes and locomotives on the basis of the characteristics given below b) Discuss in detail the characteristics and torque requirements of the machine mentioned during the starting and mention what are the requirements in load to start the machine. N N Ta
- • A DC shunt machine while running as generator develops a voltage of 250 V at 1000 r.p.m. on no-load. It has armature resistance of 0.5 ohm and field resistance of 250 ohm. When the machine runs as motor, input to it at no-load is 4 A at 250 V. Calculate the speed and efficiency of the machine when it runs as a motor taking 40 A at 250 V. Armature reaction weakens the field by 4 %a)Determine the type of DC Machine that can be utilized in a crane on the basis of the characteristics given below b) Discuss in detail the characteristics and torque requirements of the machine mentioned.Draw the DC Machine and label its parts
- Mechanical losses represent: A. Windage losses O B. None of the other choices are correct O. Losses due to magnetization and demagnetization of the core O D. Resistive losses in the windings of the machine O E. Losses due to friction of the moving partsWhat Is CNC Machining? How does it work?5. In relation to a compound d.c machine, choose the right statement from the following. (A) The resistance of the shunt field coil will be many times higher than the series field coil. (B) The resistance of the shunt field coil and the series field coil are of the same order. (C) The resistance of the series field coil will be many times higher than the shunt field coil. (D) Either of (A), (B) and (C) is true statement.