1. Which of the following is the first method proposed for the design of FIR filters? A. Chebyshev approximation B. Frequency sampling method C. Windowing technique D. None of the mentioned 2. The lack of precise control of cutoff frequencies is a disadvantage of which of the following designs? A. Window design B. Chebyshev …
1. A 4 point starter is used to start and control the speed of a DC shunt motor with armature resistance control DC shunt motor with field weakening control DC series motor DC compound motor 2. Why starters are required in a DC motor? Back emf of these motors is zero initially These motors …
1. A dual-beam oscilloscope consist of ________ 2 beams 4 beams 6 beams 8 beams 2. Two voltages can be studied simultaneously by making use of __________ Single-electron gun Two electron guns Four electron guns Six electron guns 3. A dual-beam oscilloscope has __________ 8 vertical deflection plates 6 vertical deflection plates 2 …
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1. Digital voltmeters converts ________ Analog to digital signal Digital to analog signal Current to voltage Resistance to voltage 2. A voltmeter connected across 15 kΩ resistor reads 10 V. Voltmeter is rated at 500 Ω / volt and has a full-scale reading of 20 V. The supply voltage is: 60 V 45 V …
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1. In the measuring instruments, the degree of conformity and closeness to the true value is known as: Precision Deflecting torque Measuring scale Accuracy 2. If the same measurement process is used among different instruments and operators, over a longer time period, then the variations arising out of it are called Measurement of length …
1. The dummy coils in DC machines are used for Increase the efficiency Improving commutation Reducing cost of machine Maintaining mechanical balance 2. ______ is used as the power source in electric arc welding. DC Series generator Differentially wound compound generator Separately excited DC generator Cumulative compound DC generator 3. The pole pitch …
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1. The dummy coils in DC machines are used for Increase the efficiency Improving commutation Reducing cost of machine Maintaining mechanical balance 2. ______ is used as the power source in electric arc welding. DC Series generator Differentially wound compound generator Separately excited DC generator Cumulative compound DC generator 3. The pole pitch …
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1. The nature of emf induced in the armature of a dc generator is _____ and it is converted into _____ by means of split rings. DC : AC AC : AC DC : DC AC : DC 2. A dc shunt generator has a critical field resistance of 400 Ω at 1200 rpm. …
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1. In lap winding of a P pole dc machine, the number of brushes are equal to 2 4 P 2P 2. The winding where dummy coils are used is sometimes called as Duplex winding Triplex winding Forced winding None of these 3. In armature winding the distance between the segments to which …
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1. Which of the following machines do NOT use equalizer rings? 4-pole duplex wave-wound DC machine 6-pole simplex lap-wound DC machine 4-pole simplex wave-wound DC machine 4-pole simplex lap-wound DC machine 2. ________ is used for neutralizing armature reaction while inter pole winding is used for improving commutation. Armature winding Field Winding Pole Shoe …
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