EPM Consulting - Explosion Prevention Quiz

What has to be present for an explosion to occur?

What is the first step in determining if you have an explosion risk?

How much dust on a surface is considered dangerous?

Which dust is the most explosive?

What is Pmax?

maximum pressure the ducting can withstand before failure
maximum pressure developed in a contained deflagration for an optimum mixture
the pressure at the start of a deflagration
maximum pressure of the dust collector before failure
maximum pressure reached during a deflagration prior to explosion vents opening

What is static pressure?

the pressure wave from a static spark
the pressure exerted in all directions by a fluid at rest
the pressure at the start of a deflagration
the pressure required to open an explosive vent
the pressure inside dust collector bags

What is air to cloth ratio?

distance from the bag to the side of the dust collector
ratio of the volume of bags to the volume of air
ratio of filter area to air volume
ratio of air volume to filter area
ratio of the length of bags to the interior of the dust collector

What is dilute phase pneumatic conveying?

material conveyance in a gas stream
material conveyance in a water stream
diluted material being conveyed by a compressed air stream
material transfer on conveyor belts with air around them
none of the above

What parameters are required when sizing a material handling fan?

voltage, amperage, RPM
volumetric air flow, air velocity, duct site
Hp, voltage, air density
volumetric air flow, wheel size, Hp
Hp, static pressure, volumetric air flow

How are explosion vents sized?