Related Questions

In the design of a paddle agitator, the ratio (paddle dia/tank dia) is normally taken as
A 0.1
B 0.8
C 0.25
D 0.5
In order to avoid tearing of the plate at edge, the distance from the center line of the rivet hole to the nearest edge of the plate in terms of dia. of rivet d should be equal to
A 1 d
B 1.25 d
C 1.5 d
D 1.75 d
The capillary rise of mercury is maximum in glass tube of dia __________ mm.
A 0.5
B 1
C 2
D 5
Tearing resistance required to tear off the plate per pitch length is (where p = Pitch of rivets, d = Dia. of rivet hole and $${\sigma _{\text{t}}}$$ = Permissible tensile stress for plate material)
A $${\text{pd}}{\sigma _{\text{t}}}$$
B $${\text{pt}}{\sigma _{\text{t}}}$$
C $$\left( {{\text{p}} - {\text{d}}} \right){\sigma _{\text{t}}}$$
D $$\left( {{\text{p}} - {\text{d}}} \right){\text{t}}{\sigma _{\text{t}}}$$
The actual feed in centerless grinders is given by (where d = Dia. of regulating wheel, n = Revolutions per minute, and α = Angle of inclination of wheel)
A πd
B πdn
C πdn sinα
D πdn cosα
Small dia distillation column can be a
A Packed column
B Sieve tray
C Bubble cap
D Any of these
Mass flow of granular solid (M) through a circular opening of dia, D follows
A M ∝ $$\sqrt {\text{D}} $$
B M ∝ D2
C M ∝ D3
D M ∝ D
Scale up of agitator design requires
A Geometrical similarity only
B Dynamic similarity only
C Both geometrical and dynamic similarity
D All of the above
A propeller agitator
A Produces mainly axial flow
B Is used for mixing high viscosity pastes
C Runs at very slow speed (2 rpm)
D All of the above
Agitator is provided in a crystalliser for
A Avoiding deposition on cooler surfaces
B Formation of nuclei
C Crystal growth
D All of the above

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