Related Questions

The value of Lewis form factor used in design of gears is
A Dependent on number of teeth of a gear
B Dependent on system of teeth
C Independent of size of teeth
D All of these
The other gears are the ............... gears which are those most used in normal driving.
A front
B onward
C abvance
D ahead
which type of gears has point contact between two mating gears?
A helical gears
B spiral gears
C both (a) and (b)
D none of these
The gears are termed as medium velocity gears, if their peripheral velocity is
A 1-3 m/s
B 3-15 m/s
C 15-30 m/s
D 30-50 m/s
Two advantages of using helical gears rather than spur gears in a transmission system are
A Strength and cost
B Strength and less end thrust
C Noise level and strength
D Noise level and economy
Lewis equation is applied
A Only to the pinion
B Only to the gear
C To stronger of the pinion or gear
D To weaker of the pinion or gear
নিচের কোনটি লুইস ( Lewis ) এসিড?
A         SO3 
B BF3
C  H+
D সবগুলো
Which of the following is not a Lewis acid?
A aluminium chloride
B sodium ion
C sulphur tetrafluoride
D hydroxide ion
Which is not a Lewis acid?
A AlCl3
B BF3
C NH3
D FeCl3
Schimdt number and Lewis number for pure air at atmospheric conditions are respectively
A [

A.

B. 1 and 0

B >1 and ≈ 1
C 0 and ≈ 1

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