Electrical Engineering practice bits -7

Electrical Engineering practice bits -7

The following practice bits are useful the Electrical Aspirants  who are preparing for the Different competitive exams like RRB JE ,SSC JE, ECET , GATE , PSU, PGECET,DRDO CEPTAM ,TSTRANSCO, TSGENCO, TSSSPDCL , TSNPDCL AE AND SE, APTRANSCO, APGENCO, ....ETC

1.     What is the unit of specifi resistance

a.     Ohm/cm

b.    Ohm-metre

c.     Ohm

d.    Ohm/metre

2.     Which is the example for POSITIVE temperature co efficient substance?

a.     porcelain

b.    paper

c.     Aluminium

d.    Mica

3.     Which law states the sum of current meeting  at junction is equal to zero

a.     Ohm’s law

b.    Kirchhoff’s 1^st law

c.     Kirchhoff’s 2^nd law

d.    Coulomb’s law

4.     The power consumption of 100watt lamp used for 20 hours daily will be

a.     2 units

b.    1 unit

c.     0.5 units

d.    5 units

5.     Four equal resisters are connected in series and their total resistance is 800Ω, what would be the total resistance when they are connected in parallel

a.     10Ω

b.    50Ω

c.     400Ω

d.    1600Ω

6.     The unit of the quantity of electricity is

a.     Ampere/second

b.    Coulomb

c.     Mho

d.    Watt-second

7.     The potential difference is measured by

a.     Ammeter

b.    Ohmmeter

c.     Voltmeter

d.    Wattmeter

 10.  The power dissipation of pure inductor is

a.     Very low

b.    Zero

c.     High

d.    Less than unity

11.  The magnitude of inductance ___ with an increase in the frequency

a.     Increases

b.    Decreases

c.     Unchanged

d.    None

12.  Which of the following frequencies has the longest time period

a.     1Hz

b.    10 Hz

c.     1KHz

d.    100KHz

13.  The net reactance of R.L.C circuit is

a.     X_L

b.    X_C­

c.     0

d.    X_L-X_C

14.  The RMS valueof AC voltage is

a.     V_rms=0.777 V_max

b.    V_rms=0.707 V_max

c.     V_rms=0.7 V_max

d.    V_rms=0.007 V_max

15.  What is the standard voltage rating as per BIS

a.     200V

b.    220V

c.     230V

d.    240V

16.  The reciprocal of frequency known as

a.     Time period

b.    Amplitude

c.     Time constant

d.    Resonance

17.  The inductive reactance of 2 Henry choke coil at 100Hz is

a.     100Ω

b.    216 Ω

c.     718 Ω

d.    1256 Ω

18.  The line voltage (V_L) in a star connected system is equal to

a.    

c.        V_pn

d.       3V_pn

29.    Which colour wire is recommended for earth connection as per ISI code

a.        Red

b.       Black

c.        Blue

d.       Green

FOR MORE PRACTICE BITS CLICK BELOW LINKS

https://www.electricalforu.com/2020/01/electrical-engineering-practice-bits-20.html

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