Q.8 For a R firing circuit, the maximum value of source voltage is 120 V. Find the resistance to be inserted to limit the anode current to 2.5 A.Ans 1. 300 Ω2. 48 Ω3. 117.5 Ω4. 0.021 ΩCorrect ...
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Q.35 For eliminating the fifth harmonic from the output voltage wave of a DC chopper, the ripple factor should be:Ans 1. 22. 73. 64. 5Correct Ans Provided: 1
Q.62 Magnetite is an example of:Ans 1. paramagnetic material2. diamagnetic material3. ferromagnetic material4. electromagnetic materialCorrect Ans Provided: 3
Q.2 The unknown value of the frequency of an input signal can be determined by using:Ans 1. Hay’s bridge2. Corey Foster bridge3. Wheatstone bridge4. Wien parallel bridgeCorrect Ans Provided: 4
Q.52 Which of the following statements about EHV AC transmission is NOT correct?Ans 1. Voltage regulation improves.2. Line losses are reduced.3. Transmission efficiency decreases.4. Reduction in conductor material requirement.Correct Ans Provided: 3
Q.20 In a single-phase semi converter, for continuous conduction, freewheeling diode conducts for:Ans 1. ∝2. β – ∝3. β4. β + ∝Correct Ans Provided: 1
Q.57 The curve between the no-load generated EMF and the field current of a DC generator is known as:Ans 1. magnetisation characteristic2. external characteristic3. total characteristic4. internal characteristicCorrect Ans Provided: 1
Q.30 Which type of bridge is used to measure medium resistance?Ans 1. Corey Foster bridge2. Hay’s bridge3. Kelvin double bridge4. Anderson’s bridgeCorrect Ans Provided: 1
Q.59 If P is the capital cost of equipment, n is the useful life of the equipment in years, S is the scrap value and x is annual unit depreciation, then using diminishing value method:Ans 1. S = ...
Q.55 Select the correct combination from the given options.Ans 1. Type A chopper − Second-quadrant chopper2. Type C chopper − Two-quadrant type-B chopper3. Type E chopper − ...
