alleryStart learning →Mixing time is specified per drum capacity. The unit prescribes a minimum mixing time of 1 minute for mixers up to which capacity?
A0.75 m³
B0.25 m³
C0.50 m³
D0.10 m³
Answer & Solution
Correct answer: A. 0.75 m³
1. Mixing time governs how thoroughly the ingredients are blended in a batch.
2. The unit specifies 1 minute as the minimum mixing time for mixers up to 0.75 m³ capacity.
3. For every additional 0.75 m³ or fraction thereof, mixing time is increased by 0.25 minute.
4. Some mixers use a timer that prevents discharge until the prescribed time has elapsed.
5. The smaller capacity figures are not the threshold given by the unit.
_Source: IGNOU Concrete Technology, Unit 7 "Concreting Equipment" (Mixers, Cableways, Batchers, Buckets, Pre/Post Cooling)._
Keep practising Concreting Equipment
Browse all Concreting Equipment questions for B.Tech Civil, or explore more Civil Engineering topics.
Related questions
Refrigeration plant capacity for pre-cooling of mass concrete is expressed in tons of refrIn the heat-balance equation, the specific heat of cement is generally taken between:In the heat-balance equation Eq. 7.2 for ice quantity, the latent heat of fusion of ice isIn the post-cooling pumping plant, each pipe coil is supplied at a flow rate of approximatThe unit specifies that individual embedded pipe runs may range from 180 to 360 m, with a Liquid nitrogen is used as an alternate cooling agent. The unit gives its boiling temperatEnergy imparted to a batch during mixing converts to heat in the concrete. The unit estimaFor cycle-time calculations the unit lists suggested cableway speeds. The carriage travel