A solid circular shaft which transmits 300 metric H.P at 150 rpm is to be replaced by a hollow shaft of equal weight and of the same material, having the bore equal to half the external diameter. If the horse power transmitted is to remain unchanged, the percentage change in the speed of the shaft is given by

A solid circular shaft which transmits 300 metric H.P at 150 rpm is to be replaced by a hollow shaft of equal weight and of the same material, having the bore equal to half the external diameter. If the horse power transmitted is to remain unchanged, the percentage change in the speed of the shaft is given by

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

Problem 1.1MA

See similar textbooks

Related questions

Q: A torsion dynamometer is fitted on turbine shaft to measure the angle of twist. The shaft twist 1.6°…

A: A torsion dynamometer is installed on the turbine shaft to measure the angle of twist, as we know.At…

Q: the efficiency of gear train

A: Given data; The efficiency of reducer gear train=1 kWSpeed,N=1444rpmTorque=56.36 NmRatio of speed…

Q: A motor vehicle with a total weight 1361 kg has wheels of 63.5 cm effective diameter. The engine…

A: W = 1361 kgD = 63.5 cm or 0.635 m T = 203 Nm = 85% I = 7.6 kg m2 If = 0.84 kg m2

Q: r-stroke engine (c) be the same as that of the four-

A: GIVEN:A two-stroke engine has a speed of 750 rpmA four-stroke engine has a speed of 1500 rpm

Q: As shown beiow, a shaft carries three identical sheaves. The weight of each of the sheaves is 50 lb.…

Q: The outside diameter (in mm) of the 10/14

A: Given; A hollow shaft; length,l=1m Max permissible twist in the shaft is=10 Inner dia of the…

Q: How much torque must be applied to drive the screw with the applied load in units of newton meters?

A: Here, is lead angle, is pitch, is mean thread diameter.

Q: pinion has 20 teeth, use the Lewis formula to determine the face width of the pinion and gear. Then,…

Q: A 9-in solid shaft has the same cross-sectional area as the hollow shaft of the same material with…

A: Given Data The diameter of the solid shaft is: D=9 in The inner diameter of the hollow shaft is:…

Q: The torque of a steel shaft transmitting 20 kW at 320 rpm is

A: Power transmitted by the steel shaft, P = 20 kW = 20*103 W Revolutions, N = 320 rpm

Q: Find the speed of shaft driven with the belt by an engine running at 600RPM. The thickness of belt…

A: When a belt connects two pulleys of different sizes, the speed of rotation of the two pulleys will…

Q: Required inf As the hollow steel shaft shown rotates at 165 rpm, a stroboscopic measurement…

Q: A duplex, single-acting reciprocating power pump is driven by a 40-HP electric motor ta speed of 120…

Q: Two parallel shafts 100 cm apart are connected by a belt drive. The driven pulley rotates at 250…

Q: 6 – The brake power of a single cylinder engine is defined by the relation BP = 9.75 (N/1000)3 Where…

Q: You are asked to design a four cylinder four-stroke compression ignition engine for light trucks,…

Q: A 4-stroke six cylinder tractor engine having a mean effective pressure of 120 psi and runs at 2,400…

Q: A solid 30 mm diameter shaft is rotating at a speed of 490 rpm with a maximum shear stress of 90…

A: Diameter of the shaft, D = 30 mmRotational speed of the shaft, N = 490 rpmMaximum shear stress, =…

Q: A shaft fitted with a flywheel rotates at 350 r.p.m. and drives a machine. The torque of the machine…

Q: 36 mm solid shaft is to be used to transmit 50 kW. If the shaft design is not to exceed 30 MPa,…

Q: A shaft shown in figure is acted upon by a radial force F=50N. If the shaft is made of steel,…

A: Given: F=50 N To find: Critical speed=?

Q: Power is to be transmitted from one shaft to the other by means if two rolling cones whose shafts…

Q: Consider a double hook, thaving intermediate shaft of moment of inertia 3 g-m², the input and output…

A: moment of inertia (I)= 3 g-m2 intermediate shaft angle (α)=300 Input speed (N1)= 2400 rpm Torque…

Q: What thrust is obtained from a propeller 3 m in diameter that has the characteristics given in the…

A: Given: Diameter of the propeller (D) = 3 m Propeller rotation speed (n) = 1400 rpm = (1400/60)…

Q: PROBLEM NO. 1 A 40-mm diameter, 533-mm length shaft is drilled, for a part of its length L₁, to a 20…

A: Given data: D=40 mmL=533 mmd1=20 mmd2=30 mmτ=80 MPaN=230 rpm Need to determine the maximum power…

Q: A roller chain is to transmit 5 hp from a gearmotor to a wood-working machine, with moderate shock.…

Q: Two parallel shafts connected by a cross belt have the diameters of pulleys 40cm and 60cm…

A: Given D1 = 40 cm D2 = 30 cm c = 6 m To find Verify whether belt alteration is required.

Q: A gearset has a module of 5 mm, a 20 degree pressure angle, and a 24-tooth cast iron spur pinion…

A: Given-Information: Module = 5 mmPressure angle = 20°Number of tooth on pinion(Zp)=24Rotational speed…

Q: You are asked to design a four cylinder four-stroke compression ignition engine for light trucks,…

A: Answer: The stroke length is 0.0996 meter.

Concept explainers

Combined Loading

Any functioning component, such as machine parts, structural members, pressure vessels, and so on, are all under the influence of more than one force. When anybody is under the influence of more than one force such as shear forces, bending moments, axial forces, torsion, and so on, then such body is said to be under combined loading. A very practical example of combined loading is the crankshaft of an internal combustion engine (IC engine). The crankshaft of the IC engine is under high rpm, which is caused due to the torsional forces. Due to the presence of piston, counterbalances, and internal imbalances, the crankshaft experiences lateral forces and due to the rise in temperature, the crankshaft undergoes thermal expansion, which pulls the crankshaft along the axial direction and lateral direction. The presence of unbalanced loads along the periphery of the crankshaft also induces a bending moment.

Question

A solid circular shaft which transmits 300 metric H.P at 150 rpm is to be replaced by a hollow shaft of
equal weight and of the same material, having the bore equal to half the external diameter. If the horse
power transmitted is to remain unchanged, the percentage change in the speed of the shaft is given by

Expert Solution

This question has been solved!

Explore an expertly crafted, step-by-step solution for a thorough understanding of key concepts.

SEE SOLUTION Check out a sample Q&A here

Step 1

Step 2

Step 3

Step 4

Step by step

Solved in 4 steps

SEE SOLUTION Check out a sample Q&A here

Knowledge Booster

Learn more about

Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, mechanical-engineering and related others by exploring similar questions and additional content below.

Similar questions

A spur gear with 20° full depth teeth is transmitting 20 kW at 200 rad/s. The pitch circle diameter of the gear is 100 mm. The magnitude of the force applied on the gear in the radial direction is
The steel (E-30x10° Ib/in?) shaft shown in the Figure is to be designed for a critical speed not less than 1068 rpm. Determine the smaller diameter d (in inches) needed if d; =1.25d, 4=33 in., L2= 11 in., L3=27,5 in. and W= 1957 Ib. (Gravitational acceleration=386 in/s2). L1 L3 W d, d
Don't copy from any source and also don't give handwritten solution.
ي
2. Two shafts, one solid the other one hollow, are connected end to end by means of a coupling in which there are 8 screws on the pitch diameter D = 250 mm. The solid shaft has diameter d = 50 mm and transfers the power P = 500 kW at 75 rev/s. The external diameter of the hollow shaft is dex = 75 mm. %3D Note: All parts of the system must be equally strong, and able to transfer the required power Calculate: (a) The internal diameter d; of the hollow shaft (b) The diameter of the bolts d, connecting the two shafts (c) If the hollow shaft has to be replaced by a rectangular hollow cross-section with outer dimensions b xh and uniform wall thickness of 4 mm. Calculate the values b, h while following the request to keep h = 2b
Q3 / Two shafts made from same material and have same length, the first shaft was solid and have diameter of (d) while other shaft was hollow and have outer diameter of (d) and inside diameter of (d/2). Specify the suitable shaft for transmit power of (P) at speed (o).
2. Determine the blade radius, twist and chord distributions for a 2-bladed rotor that will produce a rated power 150 kW.
20. A thrust of 30 kN along the axis of a shaft is taken by a pivot bearing consisting of the frustum of a cone. The outer and inner diameters are 200 mm and 100 mm and the semi-angle of the cone is 60°. The shaft speed is 200 rev/min 0-02. Assuming that the intensity of pressure is uniform over the surface of the bearing, find, from first principles (a) the magnitude of this pros- sure, in N/m²; (b) the power absorbed in friction. (U. Lond.) and (Ans.: 1.272 MN/m²; 1.13 kW)
In a wheel and differential axle type of lifting machine, a crank handle of 240 mm radius takes the place of the wheel and the diameters of the differential axle are 110 mm and 80 mm respectively. If an effort of 80 N is required at the handle to lift a load of 1.12 kN, find the velocity ratio, mechanical advantage and efficiency at this load.
A flat belt, of density 1000 kg/m3 has a maximum permissible stress of 2·5 MN/m². Thebelt is 200 mm wide and 12 mm thick.(a) Determine the maximum power that can be transmitted if the ratio of tight-side toslack-side tension is 2. The diameter of the driving pulley is 900 mm and the required speed of the output shaft is955 rev/min(b) Taking the belt thickness into account, determine the required diameter of theoutput pulley. (c) What would the required diameter be, assuming a total slip of 4%? (d) If the mass of the belt was neglected, explain the effect (with reasons) this wouldhave on the maximum power calculated in (a)
The shaft below is supported by 0.5 in long copper-iron light-duty journal bearings at A and B. Determine the maximum allowable shaft speed (in rpm) consistent with a bearing factor of safety of 1.8. F = 225 lbf Bearing A Bearing B 1.1 in Walow = ? 5.75 in 0.5 in 1.5 in 0.5 in