Electrical Engineering Quiz 3
1 / 50
When secondary of a current transformer is open-circuited its iron core will be__________?
2 / 50
An amplifier receives 0.1 W of input signal and delivers 15 W of signal power. What is the power gain in db?
3 / 50
A feeder, in a transmission system, feeds power to________________?
4 / 50
The ratio of reverse resistance and forward resistance of a germanium crystal diode is about ______________?
5 / 50
The direction of electric field due +0 positive charge is ___________?
6 / 50
The substances which combine together to store electrical energy during the charge are called ________ materials
7 / 50
The alternating current has frequency of 106 Hz in such a way that time period for completion of cycle is_______________?
8 / 50
For the safety of a steam boiler the number of safety valves fitted are____________?
9 / 50
The armature of D.C. generator is laminated to_______________?
10 / 50
Annual depreciation as per straight line method, is calculated by__________?
11 / 50
Which of the following problem arises in D.C. motors which are fed from thyristor bridge circuits ?
12 / 50
In a three-phase mercury arc rectifiers each anode conducts for____________?
13 / 50
A forward biased pn junction diode has a resistance of the order of_____________?
14 / 50
With the increase in temperature, the speed of DC shunt motor____________?
15 / 50
Power amplifiers handle ______________ signals compare to voltage amplifiers?
16 / 50
An induction motor is identical to_________?
17 / 50
Which instrument is used to measure the power of electric circuit ?
18 / 50
The force between two long parallel conductors is inversely proportional to_____________?
19 / 50
If the supply frequency to the transformer is increased,?the iron loss will__________?
20 / 50
If free space between the plates of a capacitor is replaced by a dielectric_____________?
21 / 50
Load factor of a power station is defined as____________?
22 / 50
In superhetrodyne receiver, the input at mixer stage is________________?
23 / 50
Maximum demand on a power plant is_________________?
24 / 50
Annual depreciation cost is calculated by___________?
25 / 50
At parallel resonance, the net reactive component circuit current is _______________?
26 / 50
The thickness of metallic shielding on cables is usually_______________?
27 / 50
In three-phase squirrel-cage induction motors____________?
28 / 50
Which of the following primary cells has the lowest voltage_________ ?
29 / 50
In Thevenin?s theorem, to find Z
30 / 50
The value of VBE ___________________?
31 / 50
By which of the following methods the temperature rise of windings and other parts may be determined ?
32 / 50
A voltmeter should have ____________resistance?
33 / 50
In a boiler installation the natural draught is produced_____________?
34 / 50
The voltage gain in a transistor connected in___________arrangement is the highest?
35 / 50
The cost of an induction motor will increase as________________?
36 / 50
Static capacitors are rated in terms of_____________?
37 / 50
The purpose of capacitors in a transistor amplifier is to___________________?
38 / 50
Automatic signalling is used for which of the following trains ?
39 / 50
A single phase one pulse controlled circuit has a resistance R and counter emf E load 400 sin(314 t) as the source voltage. For a load counter emf of 200 V, the range of firing angle control is _____?
40 / 50
The maximum efficiency of transformer coupled class A power amplifier is _______________?
41 / 50
The starting torque in case of centrifugal pumps is generally_________________?
42 / 50
One maxwell is equal to____________?
43 / 50
During reverse recovery time__________________?
44 / 50
Admittance relay is __________ relay?
45 / 50
In case of a steam engine an average coal consumption per km is nearly________________?
46 / 50
Following will happen if the specific gravity of electrolyte becomes more than 1.23
47 / 50
Copper oxide rectifier is usually designed not to operate above___________?
48 / 50
Primary air is that air which is used to_____________?
49 / 50
A crystal diode utilises ?????.. characteristic for rectification
50 / 50
The efficiency of a machine should be as ____________ as possible to reduce the operating cost?
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