Logic - General Aptitude - General Aptitude (GA) Previous Year Questions

1

2015 · General Aptitude (GA) · General Aptitude · Logic

Electrical Engineering (EE) 2015 [Session 1]

Of the four characteristics given below, which are the major requirements for an instrumentation amplifier?
P. High common mode rejection ratio
Q. High input impedance
R. High linearity
S. High output impedance

A

P, Q and R only

B

P and R only

C

P, Q and S only

D

Q, R and S only

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2

2015 · General Aptitude (GA) · General Aptitude · Logic

Electrical Engineering (EE) 2015 [Session 1]

Consider a HVDC link which uses thyristor based line-commutated converters as shown in the figure. For a power flow of 750 MW from System 1 to System 2, the voltages at the two ends, and the current, are given by: \(V_1 = 500\text{ kV}\), \(V_2 = 485\text{ kV}\) and \(I = 1.5\text{ kA}\). If the direction of power flow is to be reversed (that is, from System 2 to System 1) without changing the electrical connections, then which one of the following combinations is feasible?

A

\(V_1 = -500\text{ kV}\), \(V_2 = -485\text{ kV}\) and \(I = 1.5\text{ kA}\)

B

\(V_1 = -485\text{ kV}\), \(V_2 = -500\text{ kV}\) and \(I = 1.5\text{ kA}\)

C

\(V_1 = 500\text{ kV}\), \(V_2 = 485\text{ kV}\) and \(I = -1.5\text{ kA}\)

D

\(V_1 = -500\text{ kV}\), \(V_2 = -485\text{ kV}\) and \(I = -1.5\text{ kA}\)

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3

2015 · General Aptitude (GA) · General Aptitude · Logic

Electrical Engineering (EE) 2015 [Session 1]

Determine the correctness or otherwise of the following Assertion [a] and the Reason [r]
Assertion: Fast decoupled load flow method gives approximate load flow solution because it uses several assumptions.
Reason: Accuracy depends on the power mismatch vector tolerance.

A

Both [a] and [r] are true and [r] is the correct reason for [a].

B

Both [a] and [r] are true but [r] is not the correct reason for [a].

C

Both [a] and [r] are false.

D

[a] is false and [r] is true.

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4

2015 · General Aptitude (GA) · General Aptitude · Logic

Electrical Engineering (EE) 2015 [Session 1]

In the signal flow diagram given in the figure, \( u_1 \) and \( u_2 \) are possible inputs whereas \( y_1 \) and \( y_2 \) are possible outputs. When would the SISO system derived from this diagram be controllable and observable?\n(A) When \( u_1 \) is the only input and \( y_1 \) is the only output.\n(B) When \( u_2 \) is the only input and \( y_1 \) is the only output.\n(C) When \( u_1 \) is the only input and \( y_2 \) is the only output.\n(D) When \( u_2 \) is the only input and \( y_2 \) is the only output.

A

When \(u_1 \) is the only input and \(y_1 \) is the only output.

B

When \(u_2 \) is the only input and \(y_1 \) is the only output.

C

When \(u_1 \) is the only input and \(y_2 \) is the only output.

D

When \(u_2 \) is the only input and \(y_2 \) is the only output.

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5

2015 · General Aptitude (GA) · General Aptitude · Logic

Electrical Engineering (EE) 2015 [Session 1]

Find the transfer function \(\frac{Y(s)}{X(s)}\) of the system given below.

A

\(\frac{G_1}{1-HG_1} + \frac{G_2}{1-HG_2}\)

B

\(\frac{G_1}{1+HG_1} + \frac{G_2}{1+HG_2}\)

C

\(\frac{G_1+G_2}{1+H(G_1+G_2)}\)

D

\(\frac{G_1+G_2}{1-H(G_1+G_2)}\)

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6

2015 · General Aptitude (GA) · General Aptitude · Logic

Electrical Engineering (EE) 2015 [Session 2]

The cut-off frequencies of F1 and F2 are f₁ and f₂ respectively. If f₁ < f₂, the resultant circuit exhibits the characteristic of
(A) Band-pass filter
(B) Band-stop filter
(C) All pass filter
(D) High-Q filter

A

Band-pass filter

B

Band-stop filter

C

All pass filter

D

High-Q filter

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7

2015 · General Aptitude (GA) · General Aptitude · Logic

Electrical Engineering (EE) 2015 [Session 2]

When a bipolar junction transistor is operating in the saturation mode, which one of the following statements is TRUE about the state of its collector-base (CB) and the base-emitter (BE) junctions?
(A) The CB junction is forward biased and the BE junction is reverse biased.
(B) The CB junction is reverse biased and the BE junction is forward biased.
(C) Both the CB and BE junctions are forward biased.
(D) Both the CB and BE junctions are reverse biased.

A

The CB junction is forward biased and the BE junction is reverse biased.

B

The CB junction is reverse biased and the BE junction is forward biased.

C

Both the CB and BE junctions are forward biased.

D

Both the CB and BE junctions are reverse biased.

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8

2015 · General Aptitude (GA) · General Aptitude · Logic

Electrical Engineering (EE) 2015 [Session 2]

For linear time invariant systems, that are Bounded Input Bounded Output stable, which one of the following statements is TRUE?

A

The impulse response will be integrable, but may not be absolutely integrable.

B

The unit impulse response will have finite support.

C

The unit step response will be absolutely integrable.

D

The unit step response will be bounded.

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9

2015 · General Aptitude (GA) · General Aptitude · Logic

Electrical Engineering (EE) 2015 [Session 2]

Find the transfer function \( \frac{Y(s)}{X(s)} \) of the system given below.

A

\(\frac{G1}{1-HG1} + \frac{G2}{1-HG2} \)

B

\(\frac{G1}{1+HG1} + \frac{G2}{1+HG2} \)

C

\(\frac{G1+G2}{1+H(G1+G2)} \)

D

\(\frac{G1+G2}{1-H(G1+G2)} \)

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10

2025 · General Aptitude (GA) · General Aptitude · Logic

Electrical Engineering (EE) 2025

In the given figure, EF and HJ are coded as 30 and 80, respectively. Which one among the given options is most appropriate for the entries marked (i) and (ii) ?

A

(i) EH; (ii) 40

B

(i) JK; (ii) 36

C

(i) EG; (ii) 42

D

(i) PS; (ii) 14

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