Which Parameters can be measure by dynamometer?

A shaft of 50 mm diameter and 1 m length carries a disc which has mass eccentricity equal to 190 microns. The displacement of the shaft at a speed which is 90 percent of critical speed in microns is

In a band brake the ratio of tight side band tension to the tension on the slack side is 3. If the angle of overlap of band on the drum is 180^o the coefficient of friction required between drum and the band is.

The brakes commonly used in railway trains is

The Brake Pad in brake system depends on

The net force acting at  the mean position of a pendulum of length 5m, with a bob of mass 1 kg is …

The natural frequency of a spring mass system on earth is ${\omega }_n$. The natural frequency of this system on the moon is  (Assume g_moon = g_earth/6) is

Write the differential equation of the figure?

Find the natural frequency of the system?

The static deflection of a shaft under a flywheel is 4 mm (Take g = 10 m/s²). What is the critical speed in rad/s?

If $\omega /{\omega }_n=\sqrt{2}$, where $\omega$ is the frequency of vibrations, then the transmissibility of vibration will be

In a reciprocating engine mechanism, the crank and connecting rod of same length and  are at right angles to each other at a given instant. when the crank makes an angle of 45^o with IDC  and crank rotates with a uniform velocity of $\omega$ rad/s, the angular acceleration of the connecting rod will be -

If the ratio of the length of connecting rod to the crank radius increases, then

Consider the following statements:

1. Balancing of several masses rotating in the same plane can be effected by a single mass.

2. Balancing of several masses in different planes can be done by 2 masses in 2 planes on either side of the reference plane or on the same side.

3. Reciprocating masses cannot be completely balanced by rotating masses.

4. Secondary unbalanced forces will be negligible compared to primary imbalance forces.

Which of the above statements are correct?

When the engine is running at 750 rpm, the magnitude of primary forces is observed to be 500 N. If the crank and connecting rod are of lengths 250 mm and 1000 mm respectively, the magnitude of secondary force would be:

Which one of the following can completely balance several masses revolving in different planes on a shaft?

A four-cylinder in-line reciprocating engine is shown in the diagram given below. The cylinders are numbered 1 to 4 and the firing order is 1–4–2–3:

Which one of the following statements are correct?

The magnitude of swaying couple due to partial balance of the primary unbalancing force in locomotive is

The equation of motion of a linear vibratory system with a single degree of freedom is

$4\ddot{x}+9\dot{x}+16x=0$

The critical damping coefficient for the system is

A body starting from rest moves in a straight line with its equation of motion being

s = 2t³ – 3t² + 2t + 1

where s is displacement in m and t is time in s. Its acceleration after one second is

The first critical speed of an automobile running on a sinusoidal road is calculated by (modelling it is a single degree of freedom system)

The equation of free vibration of a system is $\frac{d^{2}x}{d{t}^2}+64{\pi }^{2}x=0.$ Its natural frequency would be

Large field guns which come to initial position after firing in shortest possible time are

Critical speed is expressed as

Stress concentration in a machine component of ductile materials is not so harmful as it is in brittle material because