Electrical Engineering Quiz 64
1 / 50
An ideal ammeter has ______________ resistance?
2 / 50
D.C. generators are connected to the busbars or disconnected from them only under the floating condition________________?
3 / 50
Helical coils can be used on___________?
4 / 50
A feedback circuit usually employs _________________ network?
5 / 50
When an a.c. signal is applied to an amplifier, ,the operating point moves along_________________?
6 / 50
In Rankine cycle the work output from the turbine is given by__________?
7 / 50
The duration of sudden snort-circuit test on a synchronous motor is usually about_____________?
8 / 50
A rheostat differs from potentiometer in the respect that it_____________?
9 / 50
A Zener regulator _____________ in the power supply?
10 / 50
Rateau steam turbine is______________?
11 / 50
The four bulbs of 40 W each are connected in series swift a battery across them, which of the following statement is true_______________?
12 / 50
The overall efficiency of a steam power station is ________ its thermal efficiency.
13 / 50
The thickness of laminations used in a transformer is usually____________?
14 / 50
Excessive formation of lead sulphate on the surface of the plates happens because of___________?
15 / 50
The isentropic expansion of steam through nozzle for the steam initially superheated at inlet is approximated by equation__________?
16 / 50
While testing a capacitor with ohm meter, if the capacitor shows charging, but the final resistance reading is appreciably less than normal, it can be concluded that the capacitor is____________?
17 / 50
If the doping level of a crystal diode is increased, the breakdown voltage__________________?
18 / 50
A MOSFET uses the electric field of a _______________to control the channel current?
19 / 50
The gravity controlled instrument has crowded scale because current is proportional to________________?
20 / 50
The value of reheat factor normally varies from___________?
21 / 50
Three identical amplifiers with each one having a voltage gain of 50,input resistance of 1K? & output resistance of 250 ,are cascaded.The open circuit voltage gain of combined amplifier is_________?
22 / 50
The minimum charge on any object cannot be less than_______________?
23 / 50
Moisture content in the soil __________ the earth soil resistance?
24 / 50
A tuned amplifier is used in ___________ applications?
25 / 50
In a transistor leakage current mainly depends on__________?
26 / 50
For which of the following applications a D.C. motor is preferred over an A.C. motor ?
27 / 50
The rating of a fuse wire is always expressed in________________?
28 / 50
For blowers which of the following motor is preferred ?
29 / 50
The steel used in steel cored conductors is usually__________?
30 / 50
The ?crawling? in an induction motor is caused by___________?
31 / 50
In case of an inductance, current is proportional to___________?
32 / 50
A good electric contact material should have all of the following properties except_____________?
33 / 50
A pentavalent impurity has______________Valence electrons?
34 / 50
The Op-amp can amplify______________?
35 / 50
The power demand can be estimated approximately by___________?
36 / 50
The man made noise sources is / are_____________?
37 / 50
Which of the following application requires high starting torque ?
38 / 50
Three lights are connected in parallel across a 120 volt source. If one light burns out_____________?
39 / 50
The distance between the starts of two consecutive coils measured in terms of coil sides is called_____________?
40 / 50
An SCR is a ____________ triggered device?
41 / 50
In a given transformer for a given applied voltage, losses which remain constant irrespective of load changes are__________?
42 / 50
For series connected SCR’s dynamic equalising circuit consists of___________?
43 / 50
Which of the following circuit element stores energy in the electromagnetic field ?
44 / 50
Which of the following component is usually fabricated out of silicon steel ?
45 / 50
The primary reason for low power factor is supply system is due to installation of____________?
46 / 50
Which of the following rectifiers have been used extensively in supplying direct current for electroplating ?
47 / 50
If brushes of a D.C. generator are moved in order to bring these brushes in magnetic neutral axis, there will be________________?
48 / 50
Which of the following is the passive element?
49 / 50
In a five-branch parallel circuit, there are 12 mA of current in each branch. If one of the branches opens, the current in each of the other four branches is_______________?
50 / 50
The cold rolled grain oriented steel has _________ permeability in the direction of the grain orientation?
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