A screw jack has 4 threads per inch. The mean radius of the thread is 2.338 inches. The mean diameter of the bearing surface under the cap is 3.25 inches. What is the turning moment required to raise the bload of 150 kg ( a.5.61 kg-inch b.50.6 kg-inch c.107 dynes d.30.3 kg-inch e.23.6 kg-inch

A screw jack has 4 threads per inch. The mean radius of the thread is 2.338 inches. The mean diameter of the bearing surface under the cap is 3.25 inches. What is the turning moment required to raise the bload of 150 kg ( a.5.61 kg-inch b.50.6 kg-inch c.107 dynes d.30.3 kg-inch e.23.6 kg-inch
by

1 Answer

Answer :

b. 50.6 kg-inch
by

Related questions

Efficiency of a screw jack in maximum when its 31 helix angle, ? is a.45 + ?/2 b.107 dynes c.? d.45 - ?/2 e.45?

Description : Efficiency of a screw jack in maximum when its 31 helix angle, ? is a.45 + ?/2 b.107 dynes c.? d.45 - ?/2 e.45?

Last Answer : d. 45 - ?/2

If span is 150 mts and sag is 10 ft of a cable carrying a load of 3200 kg per horizontal metre then tension of ends is a.104,000 kg b.107 dynes c.1200,000 kg d.932,000 kg e.584,000 kg

Description : If span is 150 mts and sag is 10 ft of a cable carrying a load of 3200 kg per horizontal metre then tension of ends is a.104,000 kg b.107 dynes c.1200,000 kg d.932,000 kg e.584,000 kg

Last Answer : d. 932,000 kg

An automobile weighing 2800 lb and travelling at 30 miles/hr, hits a depression in the road which has a radius of curvature of 50 ft. What is the total force to which springs are subjected. a.8230 lb b.6170 lb c.2800 ib d.107 dynes e.3280 lb

Description : An automobile weighing 2800 lb and travelling at 30 miles/hr, hits a depression in the road which has a radius of curvature of 50 ft. What is the total force to which springs are subjected. a.8230 lb b.6170 lb c.2800 ib d.107 dynes e.3280 lb

Last Answer : b. 6170 lb

The mass, in kg, of the earth if its radius is 6400 km, will be a.6 x 1024 b.6 x 1025 c.107 dynes d.6 x 1023 e.6 x 1022

Description : The mass, in kg, of the earth if its radius is 6400 km, will be a.6 x 1024 b.6 x 1025 c.107 dynes d.6 x 1023 e.6 x 1022

Last Answer : a. 6 x 1024

The polar moment of inertia of a hollow circular section whose external diameter is 8 cm and internal diameter of 6 cm will be a.137.5 cm4 b.107 dynes c.275 cm4 d.550 cm4 e.1100 cm4

Description : The polar moment of inertia of a hollow circular section whose external diameter is 8 cm and internal diameter of 6 cm will be a.137.5 cm4 b.107 dynes c.275 cm4 d.550 cm4 e.1100 cm4

Last Answer : c. 275 cm4

A machine requires an effort of 10 kg to lift a load of 250 kg and an effort of 13 kg for a load of 400 kg. The effort required to lift a load of 500 kg will be a.25 kg b.107 dynes c.15 kg d.35 kg e.45 kg

Description : A machine requires an effort of 10 kg to lift a load of 250 kg and an effort of 13 kg for a load of 400 kg. The effort required to lift a load of 500 kg will be a.25 kg b.107 dynes c.15 kg d.35 kg e.45 kg

Last Answer : c. 15 kg

A 100 kg flywheel having a radius of gyration of 1 m is rotating at 1000 rpm. The angular momentum of the flywheel about its axis of rotation, in kg m2/s is a.1000 b.107 dynes c.10000 d.10470 e.5235

Description : A 100 kg flywheel having a radius of gyration of 1 m is rotating at 1000 rpm. The angular momentum of the flywheel about its axis of rotation, in kg m2/s is a.1000 b.107 dynes c.10000 d.10470 e.5235

Last Answer : d. 10470

A imaginary planet has half the mass and half the radius of the earth. The acceleration of gravity at its surface would be a.9.8 m/s2 b.107 dynes c.4.9 m/s2 d.19.6 m/s2 e.2.45 m/s2

Description : A imaginary planet has half the mass and half the radius of the earth. The acceleration of gravity at its surface would be a.9.8 m/s2 b.107 dynes c.4.9 m/s2 d.19.6 m/s2 e.2.45 m/s2

Last Answer : d. 19.6 m/s2

A ball A of mass 0.25 kg moving on a smooth horizontal table with a velocity of 10 m/s strikes an identical stationary ball B on the table. If the impact is perfectly elastic, the velocity of the ball B just after the impact will be a.2.5 m/s b.zero c.5 m/s d.10 m/s e.107 dynes

Description : A ball A of mass 0.25 kg moving on a smooth horizontal table with a velocity of 10 m/s strikes an identical stationary ball B on the table. If the impact is perfectly elastic, the velocity of the ball B just after the impact will be a.2.5 m/s b.zero c.5 m/s d.10 m/s e.107 dynes

Last Answer : c. 5 m/s

A satellite orbits the earth 200 km above the surface. What speed, in m/s, is necessary for a circular orbit? The radius of the earth is 6400 km and g = 9.2 m/s2 a.7200 b.6600 c.7800 d.6000 e.107 dynes

Description : A satellite orbits the earth 200 km above the surface. What speed, in m/s, is necessary for a circular orbit? The radius of the earth is 6400 km and g = 9.2 m/s2 a.7200 b.6600 c.7800 d.6000 e.107 dynes

Last Answer : c. 7800

An automobile is travelling at 25 m/s. It takes 0.3 second to apply the brakes after which the deceleration is 6 m/s2. How far, in meters, does the automobile travel before it stops? a.45 b.107 dynes c.40 d.50 e.60

Description : An automobile is travelling at 25 m/s. It takes 0.3 second to apply the brakes after which the deceleration is 6 m/s2. How far, in meters, does the automobile travel before it stops? a.45 b.107 dynes c.40 d.50 e.60

Last Answer : e. 60

A horizontal load of 120 kg/mt is to be carried by a cable suspended between supports at same level and 60 mts apart. If the maximum permissible tension is 36,000 kg the required length of cable is a.63.3 mets b.62.5 mts c.60.8 mts d.107 dynes e.60.1 mts

Description : A horizontal load of 120 kg/mt is to be carried by a cable suspended between supports at same level and 60 mts apart. If the maximum permissible tension is 36,000 kg the required length of cable is a.63.3 mets b.62.5 mts c.60.8 mts d.107 dynes e.60.1 mts

Last Answer : e. 60.1 mts

In a tug of war, five men pull a rope to the left at A and six moen pull the rope at B. A weight of 5 kg is hung vertically from the centre of the rope. In order that the rope AB be horizontal a.the force applied on A must be equal to that on B b.at least one man on side B should be removed c.infinite force will be required to be applied at both ends d.the force required on A must not be equal to that on B e.107 dynes

Description : In a tug of war, five men pull a rope to the left at A and six moen pull the rope at B. A weight of 5 kg is hung vertically from the centre of the rope. In order that the rope AB be horizontal ... to be applied at both ends d.the force required on A must not be equal to that on B e.107 dynes

Last Answer : c. infinite force will be required to be applied at both ends

If four turms of rope around a horizontal post will hold a 100 kg weight with a pull of 1 kg, then a.107 dynes b.0.25 c.0.18 d.0.3 e.0.11

Description : If four turms of rope around a horizontal post will hold a 100 kg weight with a pull of 1 kg, then a.107 dynes b.0.25 c.0.18 d.0.3 e.0.11

Last Answer : c. 0.18

The weight of a 72 kg man on earth's surface is a.100.3 N b.72 N c.107 dynes d.706.3 N e.760 N

Description : The weight of a 72 kg man on earth's surface is a.100.3 N b.72 N c.107 dynes d.706.3 N e.760 N

Last Answer : d. 706.3 N

In a slider crank mechanism, the crank is rotating at 200 rpm. If length of connecting rod is 8 mts and crank shaft is 2 mts, velocity of crosshead at 30? rotation of crank shaft equals. a.30.2 m/s b.33.2 m/s c.35.8 mts/s d.107 dynes e.25.5 m/s

Description : In a slider crank mechanism, the crank is rotating at 200 rpm. If length of connecting rod is 8 mts and crank shaft is 2 mts, velocity of crosshead at 30? rotation of crank shaft equals. a.30.2 m/s b.33.2 m/s c.35.8 mts/s d.107 dynes e.25.5 m/s

Last Answer : e. 25.5 m/s

What will be the duration of day and night if the earth shrinks to half the present radius? a.6 hours b.12 hours c.107 dynes d.3 hours e.24 hours

Description : What will be the duration of day and night if the earth shrinks to half the present radius? a.6 hours b.12 hours c.107 dynes d.3 hours e.24 hours

Last Answer : a. 6 hours

The torque of 50 Nm is applied on the wheel operating a valve. If the wheel is rotated through two revolutions, work done in Newton-metres is given by a.628 b.107 dynes c.314 d.25 e.100

Description : The torque of 50 Nm is applied on the wheel operating a valve. If the wheel is rotated through two revolutions, work done in Newton-metres is given by a.628 b.107 dynes c.314 d.25 e.100

Last Answer : a. 628

What is the total acceleration of a point on the rim of a flywheel 4 mts in diameter 0.6 see after it has started from rest if it accelarates uniformly from rest to 2000 rpm in 20 secs. a.68.9 mts/sec2 b.102.6 mts/sec2 c.78.94 mts/sec2 d.107 dynes e.33.2 mts/sec2

Description : What is the total acceleration of a point on the rim of a flywheel 4 mts in diameter 0.6 see after it has started from rest if it accelarates uniformly from rest to 2000 rpm in 20 secs. a.68.9 mts/sec2 b.102.6 mts/sec2 c.78.94 mts/sec2 d.107 dynes e.33.2 mts/sec2

Last Answer : c. 78.94 mts/sec2

A sphere of radius r is cut from larger sphere of radius R. The distance between their centre is a. The centroid of the remaining valoume lies on the line of centres and the sistanc from the centre of the larger sphere is a.ar2 / (R2 - r2) b.107 dynes c.aR/(R2-r2) d.aR/(R - r) e.ar3 / (R3 - r3)

Description : A sphere of radius r is cut from larger sphere of radius R. The distance between their centre is a. The centroid of the remaining valoume lies on the line of centres and the sistanc from the centre of the larger sphere is a.ar2 / (R2 - r2) b.107 dynes c.aR/(R2-r2) d.aR/(R - r) e.ar3 / (R3 - r3)

Last Answer : e. ar3 / (R3 - r3)

A boy sitting in a rail road car throws a ball straight up into the air. The ball will fall back into his hands when the rail road car is a.moving at constant velocity b.accelerating forward while going around a curve of radius equal to the maximum height attained by the ball c.107 dynes d.accelerating forwardA block A is dropped down a smooth inclined plane, while another identical block B is released for free fall from the same height e.decelerating

Description : A boy sitting in a rail road car throws a ball straight up into the air. The ball will fall back into his hands when the rail road car is a.moving at constant velocity b.accelerating ... inclined plane, while another identical block B is released for free fall from the same height e.decelerating

Last Answer : a. moving at constant velocity

Rain drops (assumed to be spherical) of radii R1, 2R1, 3R, 4R, a.all of them will be zero b.all of them will be same c.drops of radius R will be maximum d.drops of radius R will be minimum e.107 dynes

Description : Rain drops (assumed to be spherical) of radii R1, 2R1, 3R, 4R, a.all of them will be zero b.all of them will be same c.drops of radius R will be maximum d.drops of radius R will be minimum e.107 dynes

Last Answer : d. drops of radius R will be minimum

A roller coaster reaches a velocity of 20 m/s at a location where the radius of curvature is 40 m. Calculate the acceleration in m/s2? a.10 b.9 c.11 d.8 e.107 dynes

Description : A roller coaster reaches a velocity of 20 m/s at a location where the radius of curvature is 40 m. Calculate the acceleration in m/s2? a.10 b.9 c.11 d.8 e.107 dynes

Last Answer : a. 10

A uniform cylinder of weight W is rolling while slipping on a rough horizontal surface under the influence of a horizontal force. The force of friction between the cylinder and the surface is a.Indeterminate b.Proportional to the coefficient of dynamic friction c.Determinate but depends on the acceleration of the cylinder d.107 dynes e.Proportional to the coefficient of static friction

Description : A uniform cylinder of weight W is rolling while slipping on a rough horizontal surface under the influence of a horizontal force. The force of friction between the cylinder and the surface is a. ... on the acceleration of the cylinder d.107 dynes e.Proportional to the coefficient of static friction

Last Answer : c. Determinate but depends on the acceleration of the cylinder

The breaking strength of a rope is 400 N. A fireman weighing 60 kg slides down the rope. The rope will break if a.107 dynes b.the acceleration is 7.5 m/s2 c.the acceleration is 1.2 m/s2 d.the acceleration is 3.1 m/s2 e.the slides with an acceleration of 15 m/s2

Description : The breaking strength of a rope is 400 N. A fireman weighing 60 kg slides down the rope. The rope will break if a.107 dynes b.the acceleration is 7.5 m/s2 c.the acceleration is 1.2 m/s2 d.the acceleration is 3.1 m/s2 e.the slides with an acceleration of 15 m/s2

Last Answer : c. the acceleration is 1.2 m/s2

A force of 100 Newtons acts for 0.5 seconds on a body of mass 20 kg which is initially at rest. The velocity attained by the body is a.20 m/s b.5 m/s c.2.5 m/s d.0.5 m/s e.107 dynes

Description : A force of 100 Newtons acts for 0.5 seconds on a body of mass 20 kg which is initially at rest. The velocity attained by the body is a.20 m/s b.5 m/s c.2.5 m/s d.0.5 m/s e.107 dynes

Last Answer : c. 2.5 m/s

A 2 kg block is dropped from a height of 4 metre onto a spring of force constant k = 1960 N/m. The spring will be compressed through a.1 cm b.4.5 cm c.3 cm d.8 cm e.107 dynes

Description : A 2 kg block is dropped from a height of 4 metre onto a spring of force constant k = 1960 N/m. The spring will be compressed through a.1 cm b.4.5 cm c.3 cm d.8 cm e.107 dynes

Last Answer : d. 8 cm

A wheel accelerates from rest with an acceleration of 6 rad/sec2. How many revolutions are experienced in 4 seconds? a.12.36 b.25.6 c.9.82 d.107 dynes e.7.64

Description : A wheel accelerates from rest with an acceleration of 6 rad/sec2. How many revolutions are experienced in 4 seconds? a.12.36 b.25.6 c.9.82 d.107 dynes e.7.64

Last Answer : e. 7.64

ML2T-2 could be the dimension of a.107 dynes b.moment of force c.viscosity d.mass moment of inertia e.momentum

Description : ML2T-2 could be the dimension of a.107 dynes b.moment of force c.viscosity d.mass moment of inertia e.momentum

Last Answer : b. moment of force

When two concurrent and coplaner forces P and Q act at an angle of 180?, their resultant will be a a.moment equal to PQ b.couple c.(P-Q) d.107 dynes e.zero

Description : When two concurrent and coplaner forces P and Q act at an angle of 180?, their resultant will be a a.moment equal to PQ b.couple c.(P-Q) d.107 dynes e.zero

Last Answer : c. (P-Q)

When all the forces acting on a body lie in one plane and their lines of action meet at one point, the forces a.constitute a moment b.constitute a couple c.are known as coplaner-concurrent forces. d.are known as non-coplaner forces e.107 dynes

Description : When all the forces acting on a body lie in one plane and their lines of action meet at one point, the forces a.constitute a moment b.constitute a couple c.are known as coplaner-concurrent forces. d.are known as non-coplaner forces e.107 dynes

Last Answer : c. are known as coplaner-concurrent forces.

If the positive and negative shear force diagram areas are not equal, it can be concluded that a.shear force diagram has been wrongly drawn b.there is at least one couple acting on the beam c.107 dynes d.there are at least two maxima for bending moment e.bending moment does not change sign

Description : If the positive and negative shear force diagram areas are not equal, it can be concluded that a.shear force diagram has been wrongly drawn b.there is at least one couple acting on the beam c.107 dynes d.there are at least two maxima for bending moment e.bending moment does not change sign

Last Answer : b. there is at least one couple acting on the beam

A beam fixed at both ends with a central load W in the middle will have zero bending moment at a.one place b.two places c.no where d.three places e.107 dynes

Description : A beam fixed at both ends with a central load W in the middle will have zero bending moment at a.one place b.two places c.no where d.three places e.107 dynes

Last Answer : b. two places

In case of cantilever, irrespective of the type of loading the maximum bendry moment and maximum shear force occur at a.107 dynes b.Free end c.2/3 of the length, from the free end d.Centre of the beam e.Fixed end

Description : In case of cantilever, irrespective of the type of loading the maximum bendry moment and maximum shear force occur at a.107 dynes b.Free end c.2/3 of the length, from the free end d.Centre of the beam e.Fixed end

Last Answer : e. Fixed end

The torque acting on a system is zero. Which of the following will be conserved? a.Angular velocity b.Linear momentum c.107 dynes d.Angular momentum e.Moment of inertia

Description : The torque acting on a system is zero. Which of the following will be conserved? a.Angular velocity b.Linear momentum c.107 dynes d.Angular momentum e.Moment of inertia

Last Answer : d. Angular momentum

If a gymnast sitting on a rotating stool, with his arms outstretched suddenly lowers his arm a.the angular velocity will remain constant b.the angular momentum will increase c.the angular velocity will decrease d.his moment of inertia will decrease e.107 dynes

Description : If a gymnast sitting on a rotating stool, with his arms outstretched suddenly lowers his arm a.the angular velocity will remain constant b.the angular momentum will increase c.the angular velocity will decrease d.his moment of inertia will decrease e.107 dynes

Last Answer : d. his moment of inertia will decrease

A force F = 2i + 3j - k is passing through the origin. Its moment about point (1, 1, 0) is a.107 dynes b.i + j + k c.2i + 3j d.zero e.i - j - k

Description : A force F = 2i + 3j - k is passing through the origin. Its moment about point (1, 1, 0) is a.107 dynes b.i + j + k c.2i + 3j d.zero e.i - j - k

Last Answer : b. i + j + k

A flywheel 200 cm in diameter is rotating at 100 rpm. A point on the rim of the flywheel will not have a.angular velocity b.centripental acceleration c.tangential acceleration d.all of the above e.107 dynes

Description : A flywheel 200 cm in diameter is rotating at 100 rpm. A point on the rim of the flywheel will not have a.angular velocity b.centripental acceleration c.tangential acceleration d.all of the above e.107 dynes

Last Answer : c. tangential acceleration

In a single threaded worm and worm wheel the number of teeth on the worm wheel is 60. The diameter of the effort wheel is 12 cm and that of load drum is 8 cm. The velocity ratio will be a.90 b.120 c.60 d.45 e.107 dynes

Description : In a single threaded worm and worm wheel the number of teeth on the worm wheel is 60. The diameter of the effort wheel is 12 cm and that of load drum is 8 cm. The velocity ratio will be a.90 b.120 c.60 d.45 e.107 dynes

Last Answer : a. 90

In a single threaded worm and worm wheel the number of teeth on the worm wheel is 80. The diameter of the effort wheel is 12 cm and that of load drum is 8 cm. The velocity ratio will be a.60 b.45 c.120 d.107 dynes e.90

Description : In a single threaded worm and worm wheel the number of teeth on the worm wheel is 80. The diameter of the effort wheel is 12 cm and that of load drum is 8 cm. The velocity ratio will be a.60 b.45 c.120 d.107 dynes e.90

Last Answer : c. 120

A wheel 8 mts in diameter coasts to rest from a speed of 800 rpm in 10 minutes. Its angular deceleration is a.308/min2 b.683 rad/min2 c.502 rad/min2 d.107 dynes e.809 rad/min2

Description : A wheel 8 mts in diameter coasts to rest from a speed of 800 rpm in 10 minutes. Its angular deceleration is a.308/min2 b.683 rad/min2 c.502 rad/min2 d.107 dynes e.809 rad/min2

Last Answer : c. 502 rad/min2

A flywheel 200 cm in diameter is rotating at 100 rpm. A point one the rim of the flywheel will not have a.angular velocity b.centripetal acceleration c.tangential acceleration d.all of the above e.107 dynes

Description : A flywheel 200 cm in diameter is rotating at 100 rpm. A point one the rim of the flywheel will not have a.angular velocity b.centripetal acceleration c.tangential acceleration d.all of the above e.107 dynes

Last Answer : a. angular velocity

What force is necessary to hold a weight of 100 kg suspended on a rope wrapped 3 times around a post ( a.0.35 b.0.8 c.1.46 d.2.85 e.107 dynes

Description : What force is necessary to hold a weight of 100 kg suspended on a rope wrapped 3 times around a post ( a.0.35 b.0.8 c.1.46 d.2.85 e.107 dynes

Last Answer : a. 0.35

A compressure force in boom in above problem is a.107 dynes b.1096 kg c.886 kg d.693 kg e.1390 kg

Description : A compressure force in boom in above problem is a.107 dynes b.1096 kg c.886 kg d.693 kg e.1390 kg

Last Answer : e. 1390 kg

Which of the following could be the unit of rotational inertia of a body in CGS system? a.cm4 b.gm-cm2 c.107 dynes d.kg-cm2 e.gm-cm4

Description : Which of the following could be the unit of rotational inertia of a body in CGS system? a.cm4 b.gm-cm2 c.107 dynes d.kg-cm2 e.gm-cm4

Last Answer : b. gm-cm2

If the above tape weights 0.001 kg/ft, sag is a.2.73 ft b.3.13 ft c.2.90 ft d.3.03 ft e.107 dynes

Description : If the above tape weights 0.001 kg/ft, sag is a.2.73 ft b.3.13 ft c.2.90 ft d.3.03 ft e.107 dynes

Last Answer : c. 2.90 ft

The maximum efficiency of a scres jack having square threads and friction angle of 30 degree will be a.0.2 b.0.11 c.0.05 d.0.33 e.0.09

Description : The maximum efficiency of a scres jack having square threads and friction angle of 30 degree will be a.0.2 b.0.11 c.0.05 d.0.33 e.0.09

Last Answer : d. 0.33

An electric motor drives a windless which hauls up a crate A of weight W = 500 kg up an inclined plane through a height of 10 m in 2 minutes. The torque acting on the windless is 25 kgm and the drum of the windless makes 30 rpm. The efficiency of the inclined plane would be a.0.41 b.0.61 c.0.265 d.0.5305 e.0.66

Description : An electric motor drives a windless which hauls up a crate A of weight W = 500 kg up an inclined plane through a height of 10 m in 2 minutes. The torque acting on the windless is 25 kgm and the drum of the ... The efficiency of the inclined plane would be a.0.41 b.0.61 c.0.265 d.0.5305 e.0.66

Last Answer : d. 0.5305

The displacement of a particle under going rectilinear motion along the x-axis is given by x = 2t3 + 21t2 + 60t + 6 metres. a.27 m/s2 b.18 m/s2 c.36 m/s2 d.9 m/s2 e.107 dynes

Description : The displacement of a particle under going rectilinear motion along the x-axis is given by x = 2t3 + 21t2 + 60t + 6 metres. a.27 m/s2 b.18 m/s2 c.36 m/s2 d.9 m/s2 e.107 dynes

Last Answer : d. 9 m/s2

A body is pushed with a force of 10 N for 0.5 second. The impulse given to the body is a.107 dynes b.50 Ns c.3.5 Ns d.5 Ns e.2.5 Ns

Description : A body is pushed with a force of 10 N for 0.5 second. The impulse given to the body is a.107 dynes b.50 Ns c.3.5 Ns d.5 Ns e.2.5 Ns

Last Answer : d. 5 Ns