Electrical Engineering Quiz 24
1 / 50
A step up chopper has input voltage 110 V and output voltage 150 V. The value of duty cycle is_____?
2 / 50
The horsepower of steam locomotives is______________?
3 / 50
Conductance is analogous to_____________?
4 / 50
The Zener current will be minimum when_____________?
5 / 50
Excess-3 code is known as_________________?
6 / 50
Those magnetic materials are best suited for making armature and transformer cores which have ________ permeability and ________ hystersis loss
7 / 50
Low efficiency of a power amplifier results in_________________?
8 / 50
A three-phase synchronous motor will have_____________?
9 / 50
A single stage transistor amplifier contains______________ and associated circuitry?
10 / 50
An electric charge at rest produces_______________?
11 / 50
The type 0 system has ___________ at the origin?
12 / 50
A JFET has ____________ power gain?
13 / 50
If the cross-sectional area of the channel in n-channel JEFT increases, the drain current _____________?
14 / 50
____________ rectifier has the lowest forward resistance?
15 / 50
A Zener diode utilises_____________characteristic for voltage regulation?
16 / 50
The load factor of domestic load is usually____________?
17 / 50
For the parallel operation of single phase transformers it is necessary that they should have___________?
18 / 50
Armature coil is short circuited by brushes when it lies_____________?
19 / 50
D.C. shunt motors are used for driving____________?
20 / 50
A balanced 3-phase system consists of_______________?
21 / 50
In a system zero initial condition means that______________?
22 / 50
A zener diode utilizes ______________ characteristics for its operation?
23 / 50
If the resistance of a conductor does not vary in accordance with Ohm?s law it is known as____________?
24 / 50
In constant-current charging method, the supply voltage from discharged to fully charged condition____________?
25 / 50
Sparking, is discouraged in a D.C. motor because_____________?
26 / 50
Properly of low temperature co-eflficient of heating element is desired due to which of the following reasons ?
27 / 50
Armature of a synchronous machine is____________?
28 / 50
Induction heating process is based on which of the following principles ?
29 / 50
Protection by fuses is generally not used beyond__________?
30 / 50
Air blast circuit breaker is used for_____________?
31 / 50
Flywheel is used with D.C. compound motor to reduce the peak demand by the motor, compound motor will have to be_____________?
32 / 50
In single phase VSI, the harmonic which is not present is____________?
33 / 50
For given maximum axle load tractive efforts of AC locomotive will be_____________?
34 / 50
Which motor is normally free from mechanical and magnetic vibrations ?
35 / 50
A power supply can deliver a maximum rated current of 0.5 A at full-load output voltage of 20 V. What is the minimum load resistance that you can connect across the supply?
36 / 50
The main constituent of permalloy is_____________?
37 / 50
What is the value of capacitance that must be connected in parallel with 50 pF condenser to make an equivalent capacitance of 150 pF ?
38 / 50
Circuit breakers usually operate under______________?
39 / 50
Two bulbs of 500 W and 200 W rated at 250 V will have resistance ratio as________?
40 / 50
Over voltage protection is recommended for______________?
41 / 50
High resistivity materials are used in_____________?
42 / 50
The slot leakage can be calculated by making which of the following assumptions ?
43 / 50
Electrolyte used in an Edison cell is___________?
44 / 50
_______________method can bring the locomotive to dead stop?
45 / 50
The major advantage of FM over AM is__________________?
46 / 50
Thermal circuit breaker has____________?
47 / 50
In a loaded Zener regulator, which is the largest Zener current ?
48 / 50
In an SCR circuit the supply voltage is generally ___________ that of breakover voltage?
49 / 50
When SCR starts conducting, then _____________ loses all control?
50 / 50
Which of the following motors are pre-ferred for overhead travelling cranes ?
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