Machine Design, Materials and Shop Practice Set B

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What is the diameter of the driving sprocket for the No. 40 roller chain?

4.8 in

3.2 in

2.6 in (correct)

Half of the Speed ratio

What is the allowable load on a simply supported wood beam with a concentrated load at the midpoint, given an allowable tensile stress of 8.3 MPa?

792 N (correct)

654 N

500 N

692 N

What is the size of pulley 2 belted to pulley 4 on shaft A if shaft B is turning at 140 rpm and pulley 4 is 30 inches in diameter?

40 in

30 in

12 in

20 in (correct)

What is the theoretical wire diameter of a spring with 12 active coils and a spring index of 10, supporting a static load of 220N with a deflection of 10mm, if the shear modulus of the spring material is 83Gpa?

14mm Signup and view all the answers

Which of the following mechanisms represents an inversion of a single slider crank chain?

Oldham’s coupling Signup and view all the answers

If a shaft is 1 m long and has a taper of 4mm per meter over a length of 500mm at one end, with the maximum diameter of the shaft being 80mm, what is the smaller diameter of the shaft?

78mm Signup and view all the answers

A jackscrew has a lever arm of 40cm and a pitch of 5mm. If the efficiency is 30%, what is the actual Mechanical Advantage (AMA)?

150 Signup and view all the answers

What is the diameter of the bolt required for a flange coupling designed to use 6 bolts on a 4-inch diameter bolt circle, with an allowable stress in shear of 12,000 psi and a maximum torque of 50 ft-lbf?

1.85mm Signup and view all the answers

What is a unique form of cast iron with worm-shaped graphite particles?

Compacted graphite iron Signup and view all the answers

In the context of the given text, what is the diameter of the driving sprocket for the No. 40 roller chain?

1.6 inches Signup and view all the answers

For a simply supported wood beam with a rectangular cross-section, 50mm wide and 100mm deep, and a concentrated load at the midpoint of the 4m span, what is the allowable load if the allowable tensile stress is 8.3 MPa?

654 N Signup and view all the answers

In the given scenario, what is the size of pulley 2 belted to pulley 4 on shaft A if shaft B is turning at 140 rpm and pulley 4 is 30 inches in diameter?

20 inches Signup and view all the answers

What is the speed ratio between the 16 tooth and 30 tooth sprockets if a No. 40 roller chain operates at 1100 rpm with a center distance of 20 inches?

1.875 Signup and view all the answers

If a shaft B turning at 140 rpm has a pulley 4, 30 inches in diameter, belted to a pulley 2 on shaft A with a speed of 210 rpm, what is the speed ratio between shaft A and shaft B?

0.67 Signup and view all the answers

In the context of machine design and materials, what is the pitch of a No. 40 roller chain?

2.6 ½ in. Signup and view all the answers

What is the theoretical wire diameter of a spring with 12 active coils and a spring index of 10, supporting a static load of 220N with a deflection of 10mm, if the shear modulus of the spring material is 83Gpa?

25mm Signup and view all the answers

What is the maximum diameter of the shaft that is 1m long, having a taper of 4mm per meter over a length of 500mm at one end?

78mm Signup and view all the answers

What is the actual Mechanical Advantage (AMA) of a jackscrew with a lever arm of 40cm and a pitch of 5mm, if the efficiency is 30%?

500 Signup and view all the answers

What is the diameter of the bolt required for a flange coupling designed to use 6 bolts on a 4-inch diameter bolt circle, with an allowable stress in shear of 12,000 psi and a maximum torque of 50 ft-lbf?

1.85mm Signup and view all the answers

What is a unique form of cast iron with worm-shaped graphite particles?

Mottled Cast iron Signup and view all the answers

What is the process of making Bolt heads by forging?

Upsetting Signup and view all the answers

What horsepower can safely be transmitted by a ½ inch set screw (holding power equal to 500lbf) employed in a pulley installation if the rotative speed of the pulley is 850 rpm and the diameter of the shaft is 1 1/2 inch?

7.37 Hp Signup and view all the answers

What is the average chain velocity when a No. 40 Roller Chain operates at 1100 rpm between 16 tooth and 30 tooth sprockets, with the center distance between the sprockets being 20 inches? (Note: the pitch of No.40 Roller chain is ½ in.)

548.75 fpm Signup and view all the answers

What is the radius of the Mohr's circle when Normal Stress Ix = 25 Mpa, Sy=30 Mpa, and Shear stress is 20 Mpa?

16 Signup and view all the answers

What angular acceleration does the flywheel experience when rotating at 120 rpm and slowing down to 110 rpm during a punching operation that requires ¾ second for the punching portion of the cycle?

1.40 rad/sq.s Signup and view all the answers

Machine Design, Materials and Shop Practice Set B

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Questions and Answers

What is the diameter of the driving sprocket for the No. 40 roller chain?

What is the allowable load on a simply supported wood beam with a concentrated load at the midpoint, given an allowable tensile stress of 8.3 MPa?

What is the size of pulley 2 belted to pulley 4 on shaft A if shaft B is turning at 140 rpm and pulley 4 is 30 inches in diameter?

What is the theoretical wire diameter of a spring with 12 active coils and a spring index of 10, supporting a static load of 220N with a deflection of 10mm, if the shear modulus of the spring material is 83Gpa?

Which of the following mechanisms represents an inversion of a single slider crank chain?

If a shaft is 1 m long and has a taper of 4mm per meter over a length of 500mm at one end, with the maximum diameter of the shaft being 80mm, what is the smaller diameter of the shaft?

A jackscrew has a lever arm of 40cm and a pitch of 5mm. If the efficiency is 30%, what is the actual Mechanical Advantage (AMA)?

What is the diameter of the bolt required for a flange coupling designed to use 6 bolts on a 4-inch diameter bolt circle, with an allowable stress in shear of 12,000 psi and a maximum torque of 50 ft-lbf?

What is a unique form of cast iron with worm-shaped graphite particles?

In the context of the given text, what is the diameter of the driving sprocket for the No. 40 roller chain?

For a simply supported wood beam with a rectangular cross-section, 50mm wide and 100mm deep, and a concentrated load at the midpoint of the 4m span, what is the allowable load if the allowable tensile stress is 8.3 MPa?

In the given scenario, what is the size of pulley 2 belted to pulley 4 on shaft A if shaft B is turning at 140 rpm and pulley 4 is 30 inches in diameter?

What is the speed ratio between the 16 tooth and 30 tooth sprockets if a No. 40 roller chain operates at 1100 rpm with a center distance of 20 inches?

If a shaft B turning at 140 rpm has a pulley 4, 30 inches in diameter, belted to a pulley 2 on shaft A with a speed of 210 rpm, what is the speed ratio between shaft A and shaft B?

In the context of machine design and materials, what is the pitch of a No. 40 roller chain?

What is the theoretical wire diameter of a spring with 12 active coils and a spring index of 10, supporting a static load of 220N with a deflection of 10mm, if the shear modulus of the spring material is 83Gpa?

What is the maximum diameter of the shaft that is 1m long, having a taper of 4mm per meter over a length of 500mm at one end?

What is the actual Mechanical Advantage (AMA) of a jackscrew with a lever arm of 40cm and a pitch of 5mm, if the efficiency is 30%?

What is the diameter of the bolt required for a flange coupling designed to use 6 bolts on a 4-inch diameter bolt circle, with an allowable stress in shear of 12,000 psi and a maximum torque of 50 ft-lbf?

What is a unique form of cast iron with worm-shaped graphite particles?

What is the process of making Bolt heads by forging?

What horsepower can safely be transmitted by a ½ inch set screw (holding power equal to 500lbf) employed in a pulley installation if the rotative speed of the pulley is 850 rpm and the diameter of the shaft is 1 1/2 inch?

What is the average chain velocity when a No. 40 Roller Chain operates at 1100 rpm between 16 tooth and 30 tooth sprockets, with the center distance between the sprockets being 20 inches? (Note: the pitch of No.40 Roller chain is ½ in.)

What is the radius of the Mohr's circle when Normal Stress Ix = 25 Mpa, Sy=30 Mpa, and Shear stress is 20 Mpa?

What angular acceleration does the flywheel experience when rotating at 120 rpm and slowing down to 110 rpm during a punching operation that requires ¾ second for the punching portion of the cycle?

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