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WorksheetsGears, pulleys, and sprocket systems
Total questions: 16
Worksheet time: 46mins
The more teeth that there are on the second gear, the less it turns.
True
False
A simple gear train system consists of four gears. Gear A has 82 teeth, gear B has 18 teeth, gear C has 28 teeth, and gear D has 42 teeth. What is the gear ratio?
.32:1
.51:1
1.95:1
.34:1
A simple gear train system consists of four gears. Gear A has 82 teeth, gear B has 18 teeth, gear C has 28 teeth, and gear D has 42 teeth. What is the output torque if a is turning at 1250 ft-lbs?
640.24 ft-lb
2440.47 ft-lb
425.82 ft-lb
3660.71 ft-lb
Which gear would be best for travelling the fastest on flat ground?
High gear would be best.
Low gear would be best.
A compound gear train is composed of four gears, A, B, C, and D. Gear A has 8 teeth and is meshed with gear B. Gear B has 24 teeth and shares a shaft with gear C, which has 18 teeth. Gear C is meshed with gear D, the output gear. Power is supplied at gear A with 30 ft·lb of torque. The necessary torque output for the system is 1080 ft·lb. What should the gear ratio of the system be?
288:1
2.7:1
27.7:1
36:1
A compound gear train is composed of four gears, A, B, C, and D. Gear A has 8 teeth and is meshed with gear B. Gear B has 24 teeth and shares a shaft with gear C, which has 18 teeth. Gear C is meshed with gear D, the output gear. Power is supplied to gear A with 30 ft·lb of torque. The necessary torque output for the system is 1080 ft·lb. How many teeth should gear D have?
81 n
216 n
288 n
144 n
If the same compound gear train system has 75 teeth at gear D, which is spinning at 125 rpm, how fast is gear A turning?
1562.5 rpm
10.5 rpm
1171.87 rpm
13.33 rpm
A belt and pulley system transfers torque into rotary motion. A motor is turning input pulleys A, B, and C, which then turns pulley D. Pulley C is 22” and is connected to pulley D at 5”. If pulley d has an output torque of 205 ft-lbs, what is the input torque of pulley c?
46.59 ft-lb
.021 ft-lb
451 ft-lb
902 ft-lb
A belt and pulley system transfers torque into rotary motion. A motor is turning input pulleys A, B, and C, which then turns pulley D. When the 16” Pulley b is the input and is connected to pulley D, which is 5”. What is the input speed if the output is 656 rpm?
185 rpm
2099.2 rpm
205 rpm
1875 rpm
A belt and pulley system transfers torque into rotary motion. A motor is turning input pulleys A, B, and C, which then turns pulley D at a speed of 180 rpm. Pulley A is connected to pulley D at 5”. If pulley D has an output speed of 225 rpm, what is the diameter at pulley A?
6"
6.24"
5"
4"
What is the benefit of an Idler Gear?
It allows you to use more gears
It allows the output to be the same torque as the input
It allows the output to be in the same direction as the input
It is not a benefit
A mountain bike uses a chain and sprocket system to transfer torque into movement. The user pedals a 8” crank shaft that is connected to gear A with 30 n and a diameter of 6”. Gear A is connected to gear D by a chain, and gear D has 84 n and a diameter of 10”. If gear D turns a 28” wheel, what is the total mechanical advantage?
1.33:1
2.66:1
20.90:1
10.45:1
