- (A) Hammer crushers operate by impact action
- (B) Standard screens have circular opening
- (C) With increase in mesh number of screens, their diameter in microns decreases
- (D) 200 mesh screen has 200 openings per linear cm
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- (A) The capacity and the effectiveness of a screen are the same
- (B) The capacity and the effectiveness of screen are opposing factors
- (C) The screening surface of a ‘reel’ (a revolving screen used in flour mills) is made of silk bolting cloth supported by wire mesh
- (D) Both
- (A) For a first order consecutive reaction, a tubular flow reactor as compared to a stirred tank reactor provides higher overall selectivity
- (B) For an ideal mixed reactor at steady state, the exit stream has the same composition as fluid within the reactor and the space time is equivalent to holding time for constant density system
- (C) Plug flow reactor (PFR) is always smaller than mixed reactor for all positive reaction orders for a particular duty
- (D) Reaction rate does not decrease appreciably as the reaction proceeds in case of an autocatalytic reaction
- (A) A chemical reaction accompanied by absorption of heat is called an exothermic reaction
- (B) A chemical reaction accompanied by evolution of heat is called an endothermic reaction
- (C) The rate constant for a first order reaction does not change on changing the concentration units
- (D) Chemical equilibrium state is dynamic in nature
- (A) A catalyst speeds up the forward reaction but slows shown the reverse reaction
- (B) Addition of catalyst changes the equilibrium constant
- (C) Pressure changes do not change the equilibrium concentrations
- (D) The composition of equilibrium is changed by catalyst
- (A) A catalyst does not change AH of the reaction
- (B) A catalyst changes the equilibrium point
- (C) Law of mass action was suggested by Le-Chatelier
- (D) The difference between the energy of reactants and that of the products is the activation energy
- (A) Propylene
- (B) Phenol & formaldehyde
- (C) Phenol & acetaldehyde
- (D) Urea & formaldehyde
- (A) Ductile
- (B) Brittle
- (C) Malleable
- (D) None of these
- (A) The mole fraction of solute is directly proportional to the molality of a ‘dilute’ solution
- (B) For a non-reacting binary mixture of ideal gases, the partial pressure distribution of both components is nonlinear in the case of steady state unimolal unidirectional diffusion
- (C) Azeotropes obey Raoult’s law at all temperature
- (D) The relative volatility of a binary mixture at the Azeotropic composition is 1
- (A) Magnetic separation method can be employed to treat both dry & wet ores
- (B) Reduction ratio in crushing operation is defined as the ratio of minimum feed size to the maximum product size
- (C) Gyratory crusher is used for coarse crushing
- (D) Screens are of stationary, moving and vibratory types
