Electric Drives Voltage Frequency Control Online Exam Quiz
Electric Drives Voltage Frequency Control GK Quiz. Question and Answers related to Electric Drives Voltage Frequency Control. MCQ (Multiple Choice Questions with answers about Electric Drives Voltage Frequency Control
Calculate the power factor if the power angle is 45°.
Options
A : .707
B : .407
C : .608
D : 1
Calculate the value of the duty cycle if the system is on for 1 sec and off for inf sec.
Options
A : 0
B : .89
C : .148
D : .46
Calculate the reactive power in a 451.26 ? resistor.
Options
A : 1 VAR
B : .6 VAR
C : 0 VAR
D : .9 VAR
Calculate the reactive power in a 725.45 ? resistor.
Options
A : 122.1 VAR
B : 261.1 VAR
C : 0 VAR
D : 199.7 VAR
The phase difference between voltage and current in the purely inductive coil.
Options
A : 20°
B : 90°
C : 40°
D : 88°
Calculate the value of the short circuit ratio if Voc=78 V, Isc=15 A with field current = 5 A.
Options
A : 5.2
B : 4.8
C : 3.2
D : 1.8
Calculate the minimum value of the active power in the cylindrical rotor synchronous machine? (Eb represents armature emf, Vt represents terminal voltage, ? represents rotor angle, X represents reactance)
Options
A : Eb×Vt×sin?÷X
B : 0
C : Eb2×Vt×sin?÷X
D : Eb×Vt÷X
The slope of the I-V curve is 180°. Calculate the value of resistance.
Options
A : inf ?
B : .81 ?
C : 45 ?
D : 41.2 ?
What is the unit of displacement?
Options
A : m/s
B : m
C : atm/m
D : Volt
Armature reaction is cross-magnetizing in nature due to a resistive load in the synchronous generator.
Options
A : True
B : False
C :
D :
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