The maximum efficiency of spiral gears is (where θ = Shaft angle, and φ = Friction angle) sin (θ + φ) + 1/ cos (θ - φ) + 1 cos (θ + φ) + 1/ cos (θ - φ) + 1 cos (θ - φ) + 1/ cos (θ + φ) + 1 cos (θ - φ) + 1/ sin (θ + φ) + 1 TRUE ANSWER : ? YOUR ANSWER : ?
The component of the acceleration, perpendicular to the velocity of the particle, at the given instant is called Radial component Tangential component Coriolis component None of these TRUE ANSWER : ? YOUR ANSWER : ?
The height of a Watt's governor is Directly proportional to speed Inversely proportional to (speed)² Directly proportional to (speed)² Inversely proportional to speed TRUE ANSWER : ? YOUR ANSWER : ?
In a four-bar chain it is required to give an oscillatory motion to the follower for a continuous rotation of the crank. For the lengths of 50 mm of crank and 70 mm of the follower, determine theoretical maximum length of coupler. The distance between fixed pivots of crank and followers is 45 mm Slightly less than 95 mm Slightly more than 95 mm 95 mm TRUE ANSWER : ? YOUR ANSWER : ?
In gramophones for adjusting the speed of the turntable, the following type of governor is commonly employed Inertia governor Wilson Hartnell governor Pickering governor Hartung governor TRUE ANSWER : ? YOUR ANSWER : ?
The partial balancing means Balancing partially reciprocating masses Balancing partially revolving masses Best balancing of engines All of these TRUE ANSWER : ? YOUR ANSWER : ?
The two links OA and OB are connected by a pin joint at O. If the link OA turns with angular velocity ω₁ rad/s in the clockwise direction and the link OB turns with angular velocity ω₂ rad/s in the clockwise direction, then the rubbing velocity at the pin joint O is (where r = Radius of the pin at O) (ω₁ - ω₂)r (ω₁ - ω₂)2r (ω₁ + ω₂)r ω₁.ω₂.r TRUE ANSWER : ? YOUR ANSWER : ?
Which of the following is a pendulum type governor? Watt governor Porter governor Hartnell governor None of these TRUE ANSWER : ? YOUR ANSWER : ?
When brakes are applied to all the four wheels of a moving car, the distance traveled by the car before it is brought to rest, will be Maximum None of these Zero Minimum TRUE ANSWER : ? YOUR ANSWER : ?
A Hartnell governor has its controlling force (Fc) given by Fc = ar + b, where r is the radius of rotation and a and b are constants. The governor becomes isochronous when a is +ve and b is also +ve a is +ve and b is -ve a = 0 and b is +ve a is +ve and b = 0 TRUE ANSWER : ? YOUR ANSWER : ?