Which type of gear train is used in clock mechanism to join hour hand and minute hand?
A. Simple gear train
B. Compound gear train
C. Reverted gear train
D. Epicyclic gear train
Answer: Option C
Solution (By Examveda Team)
In a clock mechanism, both the hour hand and the minute hand rotate about the same central axis, but they rotate at different angular speeds (the minute hand completes one revolution per hour, while the hour hand completes one revolution in twelve hours).A reverted gear train is specifically designed so that the input shaft and output shaft are coaxial, which is an essential requirement in clocks where both hands must be mounted on the same axis.
Although a simple gear train can transmit motion between gears, it generally does not satisfy the coaxial shaft requirement when multiple gears are needed to obtain the 12:1 speed reduction within a compact space.
A compound gear train can provide large speed ratios but the input and output shafts are not coaxial, making it unsuitable for clock hands.
An epicyclic gear train is used in applications like automatic transmissions and is unnecessarily complex for clock mechanisms.
Hence, the correct and standard answer in Theory of Machines is Reverted gear train.
This Question Belongs to Mechanical Engineering >> Theory Of Machine
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C is correct
In a clock mechanism, a reverted gear train is used to connect the minute and hour hands.
dont misguide ,
explain how the option D is correct
The reverted gear trains are used in automotive transmissions, lathe back gears, industrial speed reducers, and in clocks (where the minute and hour hand shafts are co-axial).
Answer should be reverted gear train.. because minute and hour hand are in same axis i.e coaxial
Answer - D is wrong
REVERTED GEAR TRAIN is the perfect Answer
Reverted gear train is ok
Its answer sgould be reverted gear train
But Exact statement or Answer for these question is REVERTED GEAR TRAIN.
Reverted Gear Train is correct
2)In a kinematic pair, when the elements have surface contact while in motion, it is a -----------
A) higher pair
B) closed pair
C) lower pair
D) spherical pair
Reverted gear train
Riverted gear train are used
Option D is correct. Only epicyclic gear trains are used in wrist watches etc. If we look at the shaft axis reverted gear train, they are fixed relative to each other while epicyclic gear trains have common axis between gear and arm.
reverted gear train
The reverted gear trains are used in automotive transmissions, lathe back gears, industrial speed reducers, and in clocks.
correct ans is riverted gear train
Reverted gear train
Explanation: automotive transmissions, lathe back gears, industrial speed reducers, and in clocks (where the minute and hour hand shafts are co-axial
Explanation: The reverted gear trains are used in automotive transmissions, lathe back gears, industrial speed reducers, and in clocks (where the minute and hour hand shafts are co-axial.
Reverted gear train is correct answer
answer should be riveted gear
I think it's answer is Reverted gear train in which first and last axis of shaft are co-axially.