A structure with negative degree of freedom is known as a

In a Hartnell governor, the mass of each ball is 4 kg. The maximum and minimum centrifugal forces on the balls are 1800 N and 100 N at radii 25 cm and 20 cm, respectively. The lengths of vertical and horizontal arms of the bell-crank levers are the same. What is the spring stiffness?

In which one of the following is a flywheel generally employed ?

If the speed of the engine varies between 390 and 410 rpm in a cycle of operation, the coefficient fluctuation of speed will be

Considering the following statements:

In case of gears of involute profiles, increase in the Centre to Centre distance between the mounting shafts

(1) Increases the pressure angle

(2) Will not affect the law of gearing

(3) Shortens the path of contact

(4) Increases the contact ratio

Which of the above statements are correct?

A gear of 28 cm pitch circle diameter has 40 teeth. The circular pitch will nearly be

Which one of the following statement is correct?

In a locomotive, the ratio of the connecting rod length to the crank radius is kept very large in order to

In order to have complete balance of several revolving masses mounted in different planes and different angular positions over a shaft

The four stroke six cylinder in line engine symmetrical about centre line can be balanced for

In a 4-cylinder 4-stroke in-line IC engine the angle between two successive cranks should be 180^o. But this rule is violated for cranks 2 and 3 (i.e., inner cranks) and the angle is made 0^o. This is done to achieve primary force,

In case of partial balancing of single cylinder reciprocating engine, what is the primary disturbing force along the line of stroke ?

where c = Fraction of reciprocating mass to be balanced;

$\omega$ = Angular velocity of crankshaft;

$\theta$ = Crank angle

Critical speed is expressed as

Which of the following are responsible for occurrence of critical or whirling speed of shaft?

1) Eccentric mounting of the rotor

2) Non-uniform distribution of rotor material

3) Bending of shaft due to the weight of the rotor and the shaft itself

4) Environmental effect such as effect of moisture and temperature

Select the correct answer using the code given below

Consider the  statements

1) Flywheel and governor of an engine are the examples of an open loop control system

2) Governor is the example of closed loop control system

3) The thermostat of a refrigerator and relief valve of a boiler are the examples of closed loop control system

Which of these statements is/are correct?

Which of the following is example of constrained motion.

Shaft in a foot step bearing is an example of .

Ball & Socket joint is a type of

If no. of link is n the possible no. of inversion is equal to

For a kinematic chain the DOF will be

Which of the statement satisfies the Grashof’s Law

Where S= shortest link, L=longest link and p, q are intermediate links.

The distance between two parallel shafts is 18 mm and they are connected by an oldham’s coupling. The driving shaft revolves at 160 rpm. What will be the maximum speed of sliding of tongue of the intermediate piece along its groove?

In a mechanism a spring is equivalent to how many binary links?

In hand pump which link is the fixed link

Which of the following are double slider crank mechanism

For a 4-bar mechanism linkage in toggle position the value of mechanical advantage is

If the annular wheel of an epicyclic gear train has 100 teeth and the planet wheel has 20 teeth, the no. of teeth on the sun wheel is

In case of involute  gear, if the center distance is changed

In the case of involute system of gears, if the Centre distance is changed

In the figure shown below, acceleration of the point C is 5 cm/s² then the  length of the link CD is

Match the columns :

In a simple gear train, if the number of idler gears is odd, then the direction of motion of driven gear will.

The angle of driving and driven shaft with the intermediate shaft is 60^o .The maximum and minimum velocities of the driven shaft for the given double Hooke’s joint when driving shaft is rotating  at 400 r.p.m is….

While designing a cam, pressure angle is one of the most important parameter which is directly proportion to

Consider the following statements:

1. The condition of stability of governor requires that the slope of the controlling force curve should be less than that of the line representing the centripetal force at the equilibrium speed under consideration.

2. For a centrifugal governor when the load of a prime mover drops suddenly, the sleeve should at once reach the lowest position.

Which of these statements is / are correct?

For a governor running at constant speed, what is the value of the force acting on the sleeve?

The natural frequency of torsional oscillation of the disc is given by

Find the natural frequency of the system

K₁ = 1 kN/m

K₂ = 3 kN/m

K₃ = 2 kN/m

m = 1 kg

A reciprocating engine running of 80 rad/sec is supported on springs the static deflection of the spring is 1 mm take g = 10 m²/s. When the engine runs, what will be the frequency of the system

Given equation of free vibration system $\ddot{x}+36{\pi }^{2}x=0$ the natural frequency is