Electrical Engineering Quiz 5
1 / 50
Mercury is a choice with steam in binary vapour cycle because it has____________?
2 / 50
If the load resistance decreases in a Zener regulator, then Zener current ______________?
3 / 50
Which of the following motor has the poorest speed regulation ?
4 / 50
All of the following are equivalent to watt except_____________?
5 / 50
The power scale of circle diagram of an induction motor can be found from__________?
6 / 50
The curve between V and I of SCR when anode is positive w.r.t cathode and when anode is negative w.r.t cathode are known as_____________________?
7 / 50
Volt box is a component to_____________?
8 / 50
During load shedding:
9 / 50
The following constitute short-circuit in the armature winding.
10 / 50
The best indication about the state of charge on a lead-acid battery is given by____________?
11 / 50
The Q of the crystal is of the order of____________?
12 / 50
Relative permeability of vacuum is__________?
13 / 50
In a shaded pole single-phase motor, the revolving field is produced by the use of_________?
14 / 50
The leakage current across a pn junction is due to________________?
15 / 50
What will be the magnetic potential difference across the air gap of 2 cm length in magnetic field of 200 AT/m ?
16 / 50
In parallel resonance, the circuit impedance is_________________?
17 / 50
Long distance railways use which of the following ?
18 / 50
capacitors are used for audio frequency and radio frequency coupling and tuning ?
19 / 50
Damping of the Ballistic galvanometer is made small to_______________?
20 / 50
What is used to protect a thyristor from high di / dt conditions__________?
21 / 50
What will be the collector efficiency of a power amplifier having zero signal power dissipation of 5 watts and a.c. power output of 2 watts ?
22 / 50
In split-phase motor auxiliary winding is of___________?
23 / 50
When a conductor carries more current on the surface as compared to core, it is due to___________?
24 / 50
Copper brushes in D.C. machine are used_____________?
25 / 50
When an ammeter is inserted in the circuit, the circuit current will _____________?
26 / 50
The maximum efficiency of resistance loaded class A power amplifier is _________________?
27 / 50
An average voltage of 10 V is induced in a 250 turns solenoid as a result of a change in flux which occurs in 0.5 second. The total flux change is____________?
28 / 50
A thyristor string is made of a no. of SCR connected in series and parallel. The string have volume and current of 11 KV and 4 K The voltage and current rating of available SCRs are 1800 V and 1000 For a string efficiency of 90 % let the number of SCRs in series and parallel are a and b respectively. Then the value of a and b will be_____________?
29 / 50
To send 10% of the main current through a moving coil galvanometer of resistance 99 O the shunt required is______________?
30 / 50
Six resistors are in parallel. The two lowest-value resistors are both 1.2 k?. The total resistance______________?
31 / 50
In resistance heating highest working temperature is obtained from heating elements made of_____________?
32 / 50
PVC stands for____________?
33 / 50
In conductors conduction of electricity takes place due to movement of_______________?
34 / 50
In a series parallel circuit, any two resistances in the same current path must be in___________?
35 / 50
1 volt/meter is same as___________?
36 / 50
In a rotary converter I2R losses as compared to a D.C. generator of the same size will be___________?
37 / 50
IC = aIE +____________?
38 / 50
Total number of crystal systems is____________?
39 / 50
Short-circuit test on an induction motor cannot be used to determine___________?
40 / 50
If a 6 uF capacitor is charged to 200 V, the charge in coulombs will be____________?
41 / 50
Materials subjected to rapid reversal of magnetism should have______________?
42 / 50
The attraction capacity of electromagnet will increase if the_______________?
43 / 50
Which of the following alternatives will be cheaper ?
44 / 50
The effects of EMI can be reduced by_____________?
45 / 50
During discharge, the active material of both the positive and negative plates is changed to___________?
46 / 50
In a series resonant band-pass filter, a lower value of Q results in______________?
47 / 50
Insertion of reactance in the rotor circuit_______?
48 / 50
For Parson?s reaction steam turbine, degree of reaction is____________?
49 / 50
If the anode current is 800 A, then the amount of current required to turn off the GTO is about____________?
50 / 50
Parson?s turbine is___________?
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