Q.56 Which of the following statements does NOT come under the advantages of stationary armature in an alternator?Ans 1. Stator winding is subjected to centrifugal forces.2. Sparking at brushes is completely avoided.3. Perfect mechanical balance is obtained on ...
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Q.59Ans 1. 0.02 A2. 0.02 mA3. 0.08 mA4. 0.08 ACorrect Ans: 4
Q.57 The purpose of the auxiliary motor in starting of synchronous motor is ________.Ans 1. to increase the efficiency2. to bring the synchronous motor speed near to synchronous speed3. to give field excitation to the motor4. to reduce ...
Q.55 A two terminal network is connected to a resistive load whose resistance is equal to two times the Norton’s resistance of the network. What will be the load current if Norton’s current is IN ?Ans 1.
Q.63 Which of the following is NOT an important outcome of estimation?Ans 1. It gives quality management system.2. It gives approximate budget.3. It avoids wastage of materials.4. It helps to use correct material.Correct Ans: 1
Q.61 Which of the following statements is NOT correct about a sine wave?Ans 1. Time period is the number of cycles per seconds.2. Frequency is the reciprocal of time period.3. RMS value is 0.7 times the peak value.4. ...
Q.43 The rating of a transformer is in kVA because _______.Ans 1. the total losses depend on the voltage and current2. only the copper losses depend on the voltage3. the total losses depend only on the current4. only ...
Q.49Ans 1. 14 W2. -14 W3. 0 W4. 7 WCorrect Ans: 2
Q.37 Over excited synchronous motors are used to:Ans 1. run lathe machines2. run reciprocating pumps3. operate crushers4. generate reactive powerCorrect Ans: 4
Q.54 Along the line of straight current carrying conductor, the magnetic field at any point is __________.Ans 1. infinite2. zero3. minimum4. maximumCorrect Ans: 2
