Electrical Engineering Quiz 60
1 / 50
A crystal diode is a ________________device?
2 / 50
The effective resistance of an iron-cored choke working on ordinary supply frequency is more than its true resistance because of____________?
3 / 50
In a universal motor, the most common cause of brush sparking is___________?
4 / 50
In a split phase motor____________?
5 / 50
Power transformers should be designed to have maximum efficiency________________?
6 / 50
An SCR can be used___________?
7 / 50
At series resonance, the circuit offers____________ impedance?
8 / 50
One telsa is equal to___________?
9 / 50
When a large surge current of very short duration flows through a thyristor then which one of the following device will operate to protect the thyristor ___________?
10 / 50
In D.C. generators, current to the external circuit from armature is given through_____________?
11 / 50
The speed of a universal motor is generally reduced by using_________?
12 / 50
The covalent bond is formed by_______________?
13 / 50
When a voltage of one volt is applied, a circuit allows one micro ampere current to flow through it. The conductance of the circuit is___________?
14 / 50
A differential amplifier is invariably used in the i/p stage of all OP-amps. This is done basically to provide the OP-amps with a very high_________?
15 / 50
In a 3-phase power measurement by two wattmeter method the reading of one of the wattmeter was zero. The power factor of the load must be_______________?
16 / 50
Which of the following motors is usually preferred for kiln drives ?
17 / 50
A fuse in a motor circuit provides protection against__________?
18 / 50
The ratio of exit pressure to inlet pressure for maximum mass flow rate per unit area of steam through a nozzle when steam is initially dry saturated is___________?
19 / 50
The output signal voltage and current of a power amplifier are 5V and 200 mA; the values being r.m.s. What is the power output ?
20 / 50
Protective relays are devices that detect abnormal conditions in electrical circuits by measuring_____________?
21 / 50
One volt is the same as___________?
22 / 50
In a single bus-bar system there will be complete shut down when____________?
23 / 50
The ratio of mass of proton to that of electron is nearly_____________?
24 / 50
In direct arc furnace, which of the following has high value ?
25 / 50
Carnot cycle comprises of_______?
26 / 50
Large internal faults are protected by_______________?
27 / 50
The spring material used in a spring control device should have the following property?
28 / 50
signal will become zero when the feedback signal and reference signs are equal?
29 / 50
Which of the following power plant has least efficiency_________?
30 / 50
he retentivity (a property) of material is useful for the construction of__________?
31 / 50
An amplidyne can give which of the following characteristics ?
32 / 50
The relative permeability of materials is not constant
33 / 50
When the 3-phase system is not grounded and if Single Line to Ground fault occurs, the voltage of the other two healthy phases will____________?
34 / 50
The second derivative input signals modify which of the following ?
35 / 50
In radio transmission, the medium of transmission is ________________?
36 / 50
In a mercury pool rectifier, the voltage drop across its electrodes___________?
37 / 50
The e.m.f. generated in a D.C. generator is directly proportional to____________?
38 / 50
If a D.C. shunt motor is working at full load and if shunt field circuit suddenly opens____________?
39 / 50
The presence of an uncharged conductor near a charged one increases the__________?
40 / 50
Load factor of a power station is generally___________?
41 / 50
Which lightening stroke is most dangerous?
42 / 50
All definitions of power factor of a series R-L-C circuit are correct except__________?
43 / 50
Which of the following generators will be preferred if they are required to be run in parallel?
44 / 50
The power dissipated in a pure capacitor is______________?
45 / 50
Which of the following is not a unit of inductance ?
46 / 50
In which of the following device the generated emf and armature current are in the opposite directions?
47 / 50
When a transistor is driven to saturation, ideally the output is _____________?
48 / 50
Which of the following methods is most accurate ?
49 / 50
The phase difference between the input and output voltages of a transistor connected in common collector arrangement is_____________?
50 / 50
An SCR is made of_______________?
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