Govt Exams Mock Test FREE | Online Quiz Competition

Q1. In a three phase system, if the instantaneous voltage values of phase R and Y are +60 V and –40 V respectively, then the instantaneous voltage of phase B is

–20 V

40 V

120 V

20 V

Q2. Pure inductive circuit

Consumes some power on average

Does not take power at all from a line

Takes power from the line during some part of the cycle and then returns back to it during another part of the cycle

None of the above

Q3. If the material has negative temperature coefficient, the resistance ______ with increase in temperature.

No changes

Increases

Decreases

Very high

Q4. Kirchhoff's current law is applicable only

Junction in a network

Closed loop in a network

Electric circuits

Electronics circuit

Q5. During parallel resonance,

The circuit impedance minimum.

Power factor is zero.

Line current is maximum.

Power factor is unity.

Q6. The unit of capacitance is

volts/coulomb

coulomb/volts

ohms

Henry/Wb

Q7. The transfer function \(\frac{Y(s)}{U(s)}\) of a system described by the state equations,
\(\frac{dx}{dt}=-2x+2u\) and \(y(t) = 0.5x\) is:

\(\frac{0.5}{(s-2)}\)

\(\frac{1}{(s-2)}\)

\(\frac{0.5}{(s+2)}\)

\(\frac{1}{(s+2)}\)

Q8. The transfer function of a control system is given as \(G(s)=\frac{1}{s^2+2s+1}\). The poles of the system are located at:

\(-1, -1\)

\(-2, -2\)

\(-1, -1, -1\)

\(-1, -1, -2\)

Q9. A system is stable for

Gain margin and Phase margin both positive.

Gain margin and Phase margin both negative.

Gain margin positive, Phase margin negative.

Phase margin negative.

Q10. Feedback oscillations have a closed loop gain of (where G, H are gain of forward and feedback path)

\(\frac{G}{1 – GH}\)

\(\frac{G}{1 + GH}\)

\(\frac{G}{1 \pm GH}\)

\(\frac{H}{1 + GH}\)

Quiz

Year 2024

July
Week # 1 Quiz 3

Q1. In a three phase system, if the instantaneous voltage values of phase R and Y are +60 V and –40 V respectively, then the instantaneous voltage of phase B is

Q2. Pure inductive circuit

Q3. If the material has negative temperature coefficient, the resistance ______ with increase in temperature.

Q4. Kirchhoff's current law is applicable only

Q5. During parallel resonance,

Q6. The unit of capacitance is

Q7. The transfer function \(\frac{Y(s)}{U(s)}\) of a system described by the state equations,
\(\frac{dx}{dt}=-2x+2u\) and \(y(t) = 0.5x\) is:

Q8. The transfer function of a control system is given as \(G(s)=\frac{1}{s^2+2s+1}\). The poles of the system are located at:

Q9. A system is stable for

Q10. Feedback oscillations have a closed loop gain of (where G, H are gain of forward and feedback path)

Quiz

Year 2024

October Week # 1 Expire on 31 Oct 2024

October Week # 2 Expire on 07 Nov 2024

October Week # 3 Expire on 14 Nov 2024

October Week # 4 Expire on 21 Nov 2024

July Week # 1 Quiz 3

Q1. In a three phase system, if the instantaneous voltage values of phase R and Y are +60 V and –40 V respectively, then the instantaneous voltage of phase B is

Q2. Pure inductive circuit

Q3. If the material has negative temperature coefficient, the resistance ______ with increase in temperature.

Q4. Kirchhoff's current law is applicable only

Q5. During parallel resonance,

Q6. The unit of capacitance is

Q7. The transfer function \(\frac{Y(s)}{U(s)}\) of a system described by the state equations, \(\frac{dx}{dt}=-2x+2u\) and \(y(t) = 0.5x\) is:

Q8. The transfer function of a control system is given as \(G(s)=\frac{1}{s^2+2s+1}\)​. The poles of the system are located at:

Q9. A system is stable for

Q10. Feedback oscillations have a closed loop gain of (where G, H are gain of forward and feedback path)

Record & Track Your Performance

July
Week # 1 Quiz 3

Q7. The transfer function \(\frac{Y(s)}{U(s)}\) of a system described by the state equations,
\(\frac{dx}{dt}=-2x+2u\) and \(y(t) = 0.5x\) is:

Q8. The transfer function of a control system is given as \(G(s)=\frac{1}{s^2+2s+1}\). The poles of the system are located at: