Related Questions
What is the correct answer?
4
In a screw jack, the effort required to lift the load W is given by (where α = Helix angle, and φ = Angle of friction)
What is the correct answer?
4
Which of the following mechanism is obtained from lower pair?
What is the correct answer?
4
Cross head and guides form a
What is the correct answer?
4
The power from the engine to the rear axle of an automobile is transmitted by means of
What is the correct answer?
4
A shaft carrying two rotors at its ends will have
What is the correct answer?
4
Sensitiveness of the governor is defined as the ratio of the
A. Mean speed to the maximum equilibrium speed
B. Mean speed to the minimum equilibrium speed
C. Difference of the maximum and minimum equilibrium speeds to the mean speed
D. Sum of the maximum and minimum equilibrium speeds to the mean speed
What is the correct answer?
4
The included angle for the V-belt is usually
What is the correct answer?
4
In a Hartnell governor, the compression of the spring is __________ the lift of the sleeve.
What is the correct answer?
4
The length of a simple pendulum which gives the same frequency as the compound pendulum, is
What is the correct answer?
4
In a system subjected to damped forced vibrations, the ratio of maximum displacement to the static deflection is known as
A. Critical damping ratio
What is the correct answer?
4
A rotary internal combustion engine has __________ cylinders.
What is the correct answer?
4
The Hooke's joint consists of:
What is the correct answer?
4
An imaginary circle which by pure rolling action, gives the same motion as the actual gear, is called
What is the correct answer?
4
For an isochronous Hartnell governor (where r₁ and r₂ = Maximum and minimum radius of rotation of balls respectively, S₁ and S₂ = Maximum and minimum force exerted on the sleeve respectively, and M = Mass on the sleeve)
A. (m.g + S₁)/(m.g + S₂) = r₁/r₂
B. (m.g - S₁)/(m.g - S₂) = r₂/r₁
What is the correct answer?
4
A Porter governor is a
A. Pendulum type governor
C. Spring loaded governor
What is the correct answer?
4
In a cone pulley, if the sum of radii of the pulleys on the driving and driven shafts is Constant, then
A. Open belt drive is recommended
B. Crossed belt drive is recommended
C. Both open belt drive and crossed belt drive is recommended
D. The drive is recommended depending upon the torque transmitted
What is the correct answer?
4
The unbalanced force due to reciprocating masses
A. Varies in magnitude but constant in direction
B. Varies in direction but constant in magnitude
C. Varies in magnitude and direction both
D. Constant in magnitude and direction both
What is the correct answer?
4
A torsional system with discs of moment of inertia I₁ and I₂ as shown in the below figure, is gear driven such that the ratio of speed of shaft B to shaft A is 'G'. Neglecting the inertia of gears, the equivalent inertia of disc on shaft B at the speed of shaft A is equal to
What is the correct answer?
4
A shaft has two heavy rotors mounted on it. The transverse natural frequencies, considering each of the rotor separately, are 100 Hz and 200 Hz respectively. The lowest critical speed is
What is the correct answer?
4
When the crank is at the outer dead centre, in a reciprocating steam engine, then the acceleration of the piston will be
What is the correct answer?
4
The two elements of a pair are said to form a higher pair, when they
A. Have a surface contact when in motion
B. Have a line or point contact when in motion
C. Are kept in contact by the action of external forces, when in motion
D. Permit relative motion
What is the correct answer?
4
The frequency of oscillation of a compound pendulum is
C. (1/2π). √[gh/(kG² + h²)]
D. (1/2π). √[(kG² + h²)/gh]
What is the correct answer?
4
The relation between number of pairs (p) forming a kinematic chain and the number of links (l) is
What is the correct answer?
4
Klein's construction can be used to determine acceleration of various parts when the crank is at
C. Right angles to the link of the stroke
What is the correct answer?
4
A kinematic chain requires at least
A. 2 links and 3 turning pairs
B. 3 links and 4 turning pairs
C. 4 links and 4 turning pairs
D. 5 links and 4 turning pairs
What is the correct answer?
4
The frequency of oscillation of a torsional pendulum is
What is the correct answer?
4
Which of the following is a pendulum type governor?
What is the correct answer?
4
In vibration isolation system, if ω/ωn > 1, then the phase difference between the transmitted force and the disturbing force is
What is the correct answer?
4
When the sleeve of a Porter governor moves downwards, the governor speed
D. First increases and then decreases
What is the correct answer?
4
Minimum number of teeth for involute rack and pinion arrangement for pressure angle of 20° is