Electrical Engineering Practice Impotent Questions Part 6
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63-Second Cauer՚s form of reactive network synthesis is the successful removal of:
A. Poles at infinity
B. Zeros at Infinity
C. Poles at origin
D. Zeros at origin
Ans: C. Poles at origin
64-If residual magnetism of a shunt generator is destroyed accidently, it may be restored by connecting its shunt field:
A. To earth
B. To an alternator
C. To a battery
D. In reverse
Ans: C. To a battery
65-The lines of force are circular and their direction depends upon the:
A. Voltage
B. Capacitance
C. Current
D. Resistance
Ans: C. Current
66-Commutators of 220 V DC generator have brushes which are generally made of:
A. Copper
B. Electro graphite
C. Graphite copper
D. Carbon copper
Ans: B. Electro graphite
67-When a number of two port networks are connected in cascade, the individual:
A. H-matrices are multiplied
B. Ysc matrices are added
C. Zoc matrices are added
D. Chain matrices are multiplied
Ans:
68-In hot wire instruments, the sensing wire is made of:
A. Copper
B. Silver
C. Platinum-iridium
D. Copper Nickle
Ans: C. Platinum-iridium
69-The direction of induced EMF during electromagnetic induction can be determined by making use:
A. Lenz՚s law
B. Faraday՚s law
C. Ampere՚s law
D. Laplace law
Ans: A. Lenz՚s law
70-In an inductance AC circuit, the current:
A. Lags the voltage
B. Leads the voltage
C. Is in phase with the voltage
D. Both A and B
Ans: A. Lags the voltage
71-Capacitive susceptance is expressed in terms of:
A. Farads
B. Siemens
C. Micro-farads
D. Ohms
Ans: B. Siemens
72-The impedance value of generator is on a base value of . The impedance value for a base value of MVA is:
A.
B.
C.
D.
Rightoptionisnotgiven. Rightoptionis0.1p. u.
Ans: