GATE ME
Machine Design
Design of Spur Gears
Previous Years Questions

## Marks 1

Tooth interference in an external involute spur gear pair can be reduced by
Two mating spur gears have $$40$$ and $$120$$ teeth respectively. The pinion rotates at $$1200$$ $$rpm$$ and transmits a torque of $$20N.m.$$ The torq...
The minimum number of teeth on the pinion to operate without interference in standard full height involute teeth gear mechanism with $${20^ \circ }$$ ...
Large speed reductions (greater than $$20$$) in one stage of gear train are possible through
A $$1.5$$ $$kW$$ motor is running at $$1440$$ rev/min. It is to be connected to a stirrer running at $$36$$ rev/min. the gearing arrangement suitable ...
To make a worm drive reversible, it is necessary to increase
In spur gears, the circle on which the involute is generated is called the
Match the following: List-$${\rm I}$$ (A) Worm gears (B) Cross helical gears (C) Bevel gears (D) Spur gears List-$${\rm I}{\rm I}$$ 1. Parallel shafts...
Interference in a pair of gears is avoided, if the addendum circles of both the gears intersect common tangent to the base circles with in the points...
For a pinion of $$15$$ teeth, under cutting ____________( increases / decreases) with _______________(increases / decreases ) of pressure angle.
Modern gear both profile is given involute shape because
For full depth of involute spur gears, minimum number of teeth of pinion to avoid interference depends upon

## Marks 2

A spur pinion of pitch diameter $$50$$ $$mm$$ rotates at $$200$$ $$rad/s$$ and transmits $$3$$ $$kW$$ power. The pressure angle of the tooth of the pi...
A pair of spur gears with module $$5$$ $$mm$$ and a center distance of $$450mm$$ is used for a speed reduction of $$5:1$$. The number of teeth on pini...
A $${20^ \circ }$$ full depth involute spur pinion of $$4mm$$ module and $$21$$ teeth is to transmit $$15kW$$ at $$960rpm.$$ Its face width is $$25mm.... A$${20^ \circ }$$full depth involute spur pinion of$$4mm$$module and$$21$$teeth is to transmit$$15kW$$at$$960rpm.$$Its face width is$$25mm....
A spur gate has a module of $$3mm,$$ number of teeth $$16,$$ a face width of $$36mm$$ and a pressure angle of $${20^ \circ }$$. It is transmitting a p...
Match the type of gears with their most appropriate description Type of gear (P)$$\,\,\,\,\,$$ Helical (Q)$$\,\,\,\,\,$$ Spiral Bevel (R)$$\,\,\,\,\,... One tooth of gear having$$4$$module and$$32$$teeth is shown in the figure. Assume that the gear tooth and the corresponding tooth space make equal... A gear set has a pinion with$$20$$teeth and a gear with$$40$$teeth. The pinion runs at$$30rev/s$$and transmits a power of$$20KW$$. The teeth ar... A gear set has a pinion with$$20$$teeth and a gear with$$40$$teeth. The pinion runs at$$30rev/s$$and transmits a power of$$20KW$$. The teeth ar... A gear set has a pinion with$$20$$teeth and a gear with$$40$$teeth. The pinion runs at$$30rev/s$$and transmits a power of$$20KW$$. The teeth ar... Twenty degree full depth involute profiled$$19$$-tooth pinion and$$37$$-tooth gear are in mesh. If the module is$$5mm,$$the center distance betwee... A compacting machine shown in the figure below is used to create a desired thrust force by using a rack and pinion arrangement. The input gear is moun... A compacting machine shown in the figure below is used to create a desired thrust force by using a rack and pinion arrangement. The input gear is moun... In order to test the efficiency of reducer gear train$$1kW$$input was given at the input end at a speed of$$1440rpm and at the output end th...
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