SHAFTS, KEYS, AND KEYWAYS Flashcards
A machine element that transmits torque and power.
a. Pulley
b. Bearing
c. Shaft
d. None of the above
c. Shaft
The factor that affects the horsepower requirement of a shaft.
a. Torque
b. Rpm shaft
c. Peripheral velocity of shaft
d. All of the above
d. All of the above
*A shaft delivers 10 lbs at 10-cm crank radius. What is the torque delivered by the shaft? (Problem 1)
a. 40.54 kg-cm
b. 45.45 kg-cm
c. 54.54 kg-cm
d. None of the above
**If the said shaft rotates at 80 rpm, what is its power delivered ? (Problem 1)
a. 0.05 Hp
b. 0.06 hp
c. 0.07 hp
d. None of the above
b. 45.45 kg-cm
a. 0.05 Hp
If two shafts are perpendicular with each other, what type of drive system would you recommend?
a. Flat belt
b. V-belt
c. Sprocket and chain
d. All of the above
a. Flat belt
In a design of drive shaft assembly the weakest part should be the ____.
a. Shaft
b. Hub
c. Key
d. Keyway
e. None of the above
c. Key
Rule of thumb for the length of keyway based on the diameter of the shaft.
a. 1.5 the diameter
b. 2.0 the diameter
c. 2.5 the diameter
d. None of the above
a. 1.5 the diameter
A solid shaft delivers 1000 in.-lb torque at 800 rpm rotation, what shaft diameter would you recommend? Recommended design stress is 6,000 psi. (Problem 2)
a. 1 in.
b. 1.5 in.
c. 2 in.
d. None of the above
a. 1 in.
*What would you recommend for the biomass shredder’s shaft diameter if engine delivers a power is 10 hp in a shaft running at a speed of 1800 rpm? Consider a design stress for the shaft of 6000 psi (Problem 3)
a. 0.66 in.
b. 1.00 in.
c. 1.25 in.
d. None of the above
**What is the recommended size of the
shaft for the shredder above is ___.
(Problem 3)
a. ½ in.
b. ¾ in
c. 1 in
d. None of the above
a. 0.66 in.
b. ¾ in
A machine element used to fasten shaft pulleys and gear hubs together.
a. Bolt
b. Springs
c. Keys
d. None of the above
c. Keys
A grove that is placed on a shaft to prevent the pulley from slippage.
a. Keyway
b. Keyhole
c. Key
d. None of the above
a. Keyway
A type of key applicable for sliding type shaft and hub assembly.
a. Parallel key
b. Woodruff key
c. Taper key
d. All of the above
a. Parallel key
A type of key applicable for an assembly in which the hub is fastened to the shaft or an assembly in which the key is driven between the shaft and the hub.
a. Parallel key
b. Woodruff key
c. Taper key
d. All of the above
d. All of the above
Rule of thumb for the width of keyway based on the diameter of shaft.
a. ¼ the diameter
b. ½ the diameter
c. ¾ the diameter
d. None of the above
a. ¼ the diameter
Rule of thumb for the depth of keyway based on the diameter.
a. 1/8 the diameter
b. 1/4 the diameter
c. ½ the diameter
d. None of the above
a. 1/8 the diameter
The recommended key cross-section for shaft below 5.5 in. is ___.
a. square
b. rectangular
c. triangular
d. None of the above
a. square