List of practice Questions

A Sankey diagram is primarily used to represent
Saturated steam at 100 \(^\circ\)C condenses on the outside of a tube. Cold fluid enters the tube at 20 \(^\circ\)C and exits at 50 \(^\circ\)C. The value of the Log Mean Temperature Difference (in \(^\circ\)C) is:
Consider a counter-flow heat exchanger with the inlet temperatures of two fluids (1 and 2) being \(T_1 = 300\) K and \(T_2 = 350\) K. The heat capacity rates of the two fluids are \(C_1 = 1000\) W/K and \(C_2 = 400\) W/K, and the effectiveness of the heat exchanger is 0.5. The actual heat transfer rate is (in kW)
Adding insulation to a cylindrical pipe with a radius smaller than the critical radius of insulation will
A uniform cylinder of radius 10 cm and mass 20 kg is mounted so as to rotate freely about a horizontal axis that is parallel to and 5.0 cm from the central longitudinal axis of the cylinder. What is the rotational inertia of the cylinder about the axis of rotation?
When a torque of 32.0 Nm is applied to a certain wheel, the wheel acquires an angular acceleration of 25.0 units. What is the rotational inertia of the wheel?
The minimum value of angular momentum by coupling three angular momenta \(1\), \(\frac{3}{2}\) and \(\frac{5}{2}\) is:
If a particle has mass of 20 kg moves with an acceleration of \(2.5 \text{ m/s}^2\), then the magnitude of force acting on the particle is (in \(\text{kg}\cdot\text{m/s}^2\)):
The centre of gravity for a solid hemisphere about its diametral base having diameter 120 cm and is symmetric about y-axis is (in cm):
In a simple harmonic motion (SHM), the acceleration is proportional to:
Harmonic oscillator potential is:
The Born's approximation is applicable for:
The following are the centroidal coordinates of semicircular plane of \(16\pi\) cm diameter and is symmetric about \(x\)-axis.
The polar moment of inertia of a circular plane of diameter about its centroid is (in \(\text{cm}^4\)):
A ball of mass 0.1 kg, initially at rest, is dropped from height of 1 m. Ball hits the ground and bounces off the ground. Upon impact with the ground, the velocity reduces by 20%. The height (in m) to which the ball will rise is:
Which of the following has the highest specific heat capacity?
The time-independent Schrödinger equation is fundamentally an eigenvalue equation for which operator?
The ground state energy of the Hydrogen atom is approximately:
The wavefunction of a system of identical fermions must be:
The energy levels of a quantum harmonic oscillator are:
Particles with integer spin are called:
The second-order correction to the energy of the ground state is always:
Digital signals for FFT are assumed:
CMOS inverter output is LOW when input is:
A counter with modulus 8 has: