Question No. 1. Which of the following is measured by using a vector voltmeter ?
(a) Amplifier gain and phase shift
(b) Filler transfer functions
(c) Complex insersion loss
(d) All of the above
Ans: d
Question No. 2. When a synchronous motor is running at synchronous speed, the damper winding
produces
(A) damping torque.
(B) eddy current torque.
(C) torque aiding the developed torque.
(D) no torque.
Ans: D
Question No. 3. In a Schering bridge the potential of the detector above earth potential is
(a) a few volts only
(6) 1 kV
(c) 5 kV
(d) 10 kV
Ans: a
Question No. 4.In order to reduce the harmful effects of harmonics on the A.C. side of a high voltage
D.C. transmission system ______are provided.
(A) synchronous condensers (B) shunt capacitors
(C) shunt filters (D) static compensators
Ans: C
Question No. 5. A sensitive galvanometer produces large deflection for a
(a) small value of current
(b) large value of current
(c) large value of power
(d) large value of voitage
(e) none of the above
Ans: a
Question No. 6.Electric ovens using heating elements of _______________ can produce temperature
upto 3000°C.
(A) Nickel (B) Graphite
(C) Chromium (D) Iron
Ans: C
Question No. 7. If an inductance is connected in one arm of bridge and resistances in the remaining three
arms
(a) the bridge can always be balanced
(b) the bridge cannot be balanced
(c) the bridge can be balanced if the resistances have some specific values
Ans: b
Question No. 8. The operating voltage of a meggar is about
(a) 6 V
(b) 12 V
(c) 40 V
(d) 100 V
Ans: d
Question No. 9. At present level of technology, which of the following method of generating electric
power from sea is most advantageous?
(A) Tidal power. (B) Ocean thermal energy conversion
(C) Ocean currents. (D) Wave power.
Ans: A
Question No. 10. The synchronous speed for a 3 phase 6-pole induction motor is 1200 rpm. If the
number of poles is now reduced to 4 with the frequency remaining constant, the rotor
speed with a slip of 5% will be _________.
(A) 1690 rpm (B) 1750 rpm
(C) 1500 rpm (D) 1710 rpm
Ans: D
(a) Amplifier gain and phase shift
(b) Filler transfer functions
(c) Complex insersion loss
(d) All of the above
Ans: d
produces
(A) damping torque.
(B) eddy current torque.
(C) torque aiding the developed torque.
(D) no torque.
Ans: D
Question No. 3. In a Schering bridge the potential of the detector above earth potential is
(a) a few volts only
(6) 1 kV
(c) 5 kV
(d) 10 kV
Ans: a
Question No. 4.In order to reduce the harmful effects of harmonics on the A.C. side of a high voltage
D.C. transmission system ______are provided.
(A) synchronous condensers (B) shunt capacitors
(C) shunt filters (D) static compensators
Ans: C
Question No. 5. A sensitive galvanometer produces large deflection for a
(a) small value of current
(b) large value of current
(c) large value of power
(d) large value of voitage
(e) none of the above
Ans: a
Question No. 6.Electric ovens using heating elements of _______________ can produce temperature
upto 3000°C.
(A) Nickel (B) Graphite
(C) Chromium (D) Iron
Ans: C
Question No. 7. If an inductance is connected in one arm of bridge and resistances in the remaining three
arms
(a) the bridge can always be balanced
(b) the bridge cannot be balanced
(c) the bridge can be balanced if the resistances have some specific values
Ans: b
Question No. 8. The operating voltage of a meggar is about
(a) 6 V
(b) 12 V
(c) 40 V
(d) 100 V
Ans: d
Question No. 9. At present level of technology, which of the following method of generating electric
power from sea is most advantageous?
(A) Tidal power. (B) Ocean thermal energy conversion
(C) Ocean currents. (D) Wave power.
Ans: A
Question No. 10. The synchronous speed for a 3 phase 6-pole induction motor is 1200 rpm. If the
number of poles is now reduced to 4 with the frequency remaining constant, the rotor
speed with a slip of 5% will be _________.
(A) 1690 rpm (B) 1750 rpm
(C) 1500 rpm (D) 1710 rpm
Ans: D
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