18. A motor is rated at 4.5 HP. If that motor is inducing 93% of its rated power, about how much power is it producing? a. 4.84 HP b. 2.17 HP 4.185 HP d. 3.923 HP
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- A 200V shunt motor develops 23hp, when taking 20.2 kW. The field resistance is 50 ohms and the armature resistance is 0.06 ohm. A. What is the total losses? a. 2512 W b. 1756 W c. 3718 W d. 3042 W B. What is are the rotational losses? a. 1125 W b. 1667 W c. 917 W d. 825 WQ3: A universal fractional horsepower series motor has a resistance of 30 Q and a total inductance of 0.5 H. When connected to a 250 V d.c. supply and loaded to take 0.8 A, it runs at 2000 r.p.m. Estimate the speed and p.f. when connected to a 250 V a.c. supply and loaded to the same current.Q3: A universal fractional horsepower series motor has a resistance of 30 22 and a total inductance of 0.5 H. When connected to a 250 V d.c. supply and loaded to take 0.8 A, it runs at 2000 r.p.m. Estimate the speed and p.f. when connected to a 250 V a.c. supply and loaded to the same current.
- docs.google.com/form مطلوب MCQS A series motor runs at (800 r.p.m) when the voltage is (400 V) and the current is (25 A). The armature resistance is (0.4 Q) and the series field resistance is (0.2 Q). Determine the resistance to be connected in series to reduce the speed to (600 r.p.m) with same current 3.85 3 4.25 2.85 محو التحدید Brushes for commutator are made ofA series DC motor has a resistance of 5 0 between its terminals. The motor runs at 1,210 rpm at. 230 V taking acurrent of 12 A. What will be the speed at which the motor runs when it is connected in series with a 4 2resistance, if there is no change in the supply voltage and current. Give your answer to two decimal places.The field windings of a series motor has a resistance of 120 ohms at 15 deg. C. After running for two hours, the resistance increases to 140 ohms. If the temperature coefficient of the windings at 0 deg. C is 0.004, find the new temperature of the windings.
- Suppose there is a load that needs 120W of power and is located 50ft from a generator with a total resistance of 0.2525 Ohms. The load can be designed to operate at 12V or 120V. Find the voltage drop and power losses in the connecting wire for each voltage and comment on the results.1 KW B 0.5 KW rotor 57 KW A stator Tm 2.5 KW 60 KW In the diagram above of the DFEM, having 6 poles with main frequency of 60 Hz and VFM of 20 Hz. What is the value of A what the operation statue of the speed What is the value of Tm What is the value of NrYou are working as an electrician in a large steel manufacturing plant, and you are in the process of doing preventive maintenance on a large DC generator. You have megged both the series and shunt field windings and found that each has over 10 M to ground. Your ohmmeter, however, indicates a resistance of 1.5 across terminals S1andS2. The ohmmeter indicates a resistance of 225 between terminals F1andF2. Are these readings normal for this type machine, or is there a likely problem? Explain your answer.
- A series motor runs at (800 r.p.m) when the voltage is (400 V) and the current is (25 A). The armature resistance is (0.4 Q) and the series field resistance is (0.2 Q). Determine the resistance to be connected in series to reduce the speed to (600 r.p.m) with same current 3.85 O 3 O 4.25 O 2.85 O← Energy meter & Electrodyna... A 230V, 12A, 1-6 Energy meter makes 216 revolutions in 5 minutes at half load rated voltage and unity p.f. If the meter constant is 2000 rev/kwhr, then determine whether the meter runs faster or slower then actual and also the percentage error?An energy meter revolves 190 revolutions of disc for a unit of energy. Find the number of revolutions made by it during an hour when connected across a load of 14A at 220V and 0.8 power factor leading. If energy meter revolves 450 revolutions, find the % error.