List of top Electrical Power And Energy Engineering Questions asked in CUET (PG)

If the field of a synchronous motor is under excited. The power factor will be :

Given below are two statements : one is labelled as Assertion (A) and the other is labelled as Reason (R). Assertion (A) : A Wheatstone bridge is used for precise measurement of Resistance. Reason (R) : It operates on the principle of null deflection. In the light of the above statements, choose the most appropriate answer from the options given below :

For closed loop control system operation :
A. Controller generates control signal
B. Error signal is produced
C. Output is sensed by sensor
D. Reference input is compared Choose the correct answer from the options given below :

The desired properties of magnetic materials used for electrical machines are :
A. Narrow hysteresis loop to give small hysteresis loss
B. Increased resistivity to give small eddy current loss
C. Free from ageing problem
D. High ductility and free from brittleness
E. High permeability and High saturation flux density Choose the correct answer from the options given below :

Higher values of ampere-conductors cannot be recommended for synchronous machines as it will cause :
A. Increase in copper loss leading to poor efficiency and temperature rise
B. Increase in synchronous reactance leading to poor inherent voltage regulation
C. Increase in stray load loss
D. Decrease in stray load loss
E. Decrease in synchronous reactance Choose the correct answer from the options given below :

For a Three phase alternator, the effect of slot harmonics can be reduced by :
A. Skewing the slots
B. Fractional slot winding
C. Short-chorded winding
D. Distributed winding
E. Increasing the number of poles Choose the correct answer from the options given below :

Which of the following has a uniform scale ?

A lead compensating network :
A. Improves response time
B. Stabilizes the system with low phase margin
C. Enables moderate increase in gain without affecting stability
D. Increases the resonant frequency
E. Decreases the resonant frequency Choose the correct answer from the options given below :

The response of a control system having damping factor unity will be :

Which one of the following controls the speed of an energy meter ?

Laplace transform cannot be used :

A lag network for compensation normally consists of :
A. \(R, L\) and \(C\) elements
B. \(R\) and \(L\) elements
C. \(R\) and \(C\) elements
D. \(R\) only
E. \(L\) only Choose the correct answer from the options given below :

If \(A\) is a null Matrix, then its rank is :

Given below are two statements : one is labelled as Assertion (A) and the other is labelled as Reason (R). Assertion (A) : If \(u=x^n f\left(\dfrac{y}{x}\right)\), then \[ x\frac{\partial u}{\partial x}+y\frac{\partial u}{\partial y}=nu \] Reason (R) : Given function \(u\) is homogeneous of degree \(n\) in \(x\) and \(y\). In the light of the above statements, choose the most appropriate answer from the options given below :

Solving a second order Differential equation using Laplace transform :
A. Partial fraction expansion
B. Apply initial conditions in Laplace domain
C. Take Laplace transform of differential equation
D. Obtain time domain solution Choose the correct answer from the options given below :

Determining Eigenvalues of a matrix :
A. Solve the characteristic equation
B. Form matrix \(A-\lambda I\)
C. Compute determinant
D. Identify eigenvalues Choose the correct answer from the options given below :

If \( A \in R_{n \times n} \) and \( \det A = 0 \), then :
A. \(A\) is non singular and the rows and columns of \(A\) are linearly independent
B. \(A\) is non-singular and the rows and columns of \(A\) are linearly dependent
C. \(A\) is non-singular and \(A\) has one zero row
D. \(A\) is singular
E. \(A\) is singular and rows and columns of \(A\) are linearly dependent Choose the correct answer from the options given below :

The matrix equation \(AX=0\), represents :
A. non-Homogeneous linear equations
B. Homogeneous linear equations
C. Homogeneous non-linear equations
D. non-Homogeneous non-linear equations
E. non-Homogeneous Quadratic Equation Choose the correct answer from the options given below :

The greatest rate of increase of \(f=xy^2z^3\) at the point \((0,-1,-2)\) is :

The derivative of \( y=\int_{0}^{\ln x}\sin(e^t)\,dt \) is :

If \(\lambda=0\), is an eigen value of \(A\), then \(\det(A)\) is :