Plant Design Test

Fundamental in process plant design including mass balance, reactor design and column

zero

Internal energy change of a system over one complete cycle in a cyclic process is _______.

less than

Near their critical temperature, all gasses occupy volumes _______ that of ideal gas.

increases

Free energy, fugacity, and activity co-efficient are all affected by change in temperature. The fugacity coefficient of a gas at constant temperature ______ with the increased of reduced temperature.

path function

Work done is a ________.

2

What is the number of degree of freedom for liquid water in equilibrium with a mixture of nitrogen and water vapor?

decreases whereas the entropy increases

For a spontaneous process, free energy __________

disorder

Entropy is a measure of the _____ of a system

low pressure and low temperature

Solubility of a substance which dissolves as the volume of the solution increases and liberation of heat will be favored by the _____ __and__ ______.

Baking Soda

Which of the following has sodium bicarbonate as its main constituents?

not affected

In an incompressible fluid, the density is _____ with moderate change in temperature and pressure.

does not change

Acceleration head in reciprocating pump _____ the work requirement of the pump.

steam jacketed kettle

Small scale evaporation is done in a _______.

falling film evaporator

Fruit juice (a heat sensitive liquid) can be concentrated in a ___________.

increase

At constant temperature, the thermal conductivities of gases _______ with rise in pressure.

radiation, conduction, convection

The heat that escapes from a steam pipe that has not been marked is lost to the surrounding atmosphere: ________.

high proportion of air space

Low thermal conductivity of heat insulation materials is due to its

mole fraction

For a single component absorber, the operating line is straight only when plotted in term of _______ unit.

mass transfer

Plate efficiency is a function of the _________ between liquid and vapour.

maximum condenser size

Minimum reflux ratio in a distillation column results in ________.

pressure drop

Flooding in a distillation column is detected by a sharp increase in __________.

Flow rate

What is the principal factor that determines the diameter of the column?

solubility

Below are the data needed for compressor design, except ________.

flow rate of liquid and vapor

The size of a vapor-liquid separator drum (or knock-out pot, or flash drum, or compressor suction drum) should be dictated by the anticipated: __________.

reboiler

In determining the column height, the below components should be included/considered, except _____.

liquid holdup

The basic requirements of a tray design should provide sufficient ________ for good mass transfer (high efficiency).

X will decrease

Consider the gas-phase elementary reaction A to 2B, which takes place in a PFR in which A (the main reactant) and an inert I are fed. If the entering concentration of A is reduced to half of its original concentration while maintaining a constant entering volumetric flow rate, Vo, how will the conversion, x change?

50%

For an irreversible second order reaction, 50% conversion is currently achieved in one CSTR of 1000 L. It is proposed to use two 500 L CSTR’s placed side-by-side in parallel with feed, FA0 equally divided. The exit conversion, x for the two CSTR’s will be ______.

x < 50%

An irreversible gas-phase, second-order reaction A to P, proceeds to 50% conversion in a PFR operating isothermally, and isobarically at steady- state. What conversion would be obtained in a CSTR with the same volume and feed stream and operating at exactly the same temperature and pressure?

not enough information

The gas-phase reaction of 2A to B takes place in a packed-bed reactor with pressure drop. For a feed of pure A, as the reaction proceeds, the volumetric flow rate, v will ______.

X > 50%

The gas-phase reaction with the scheme A + B to 3C follows an elementary rate law and is carried out in a constant volume batch reactor with stoichiometric feed. Fr a constant volume batch reaction time of 1 h, the conversion is 50%. If the same reaction is carried out in a PFR at the same temperature with no pressure drop, for the same space-time of 1 h, what would the conversion be?

The temperature diagram

Parallel, cross-flow, and counter-flow are the most common flow patterns in heat exchangers. How can we determine what type of flow to use in a heat exchanger based on this information?

All of the above

Information can be conveyed in a unique way using flow-sheeting. What role does flow-sheeting play in the development of a chemical plant? i. This diagram depicts the layout of the equipment that will be used in the process. ii. The concentrations, flow rates, and compositions of the streams are displayed. iii. Operating conditions are displayed. iv. The flow sheet serves as a basis for comparing operating performance with design during plant start-up and subsequent operation. Operators also use it to create operating manuals and conduct operator training.

properties of process fluid

In every case, the value of fouling factor is determined by _______.

C.

Choose the incorrect statement about the use of valve trays, sieve trays, and bubble cap trays in continuous distillation columns. a. Although they are the most expensive, bubble cap trays are the best option when dealing with low vapour rates and needing a reliable liquid seal at all flow rates.

b. The Murphree efficiency of all three trays is nearly identical, but the bubble cap has a lower peak efficiency than the seive and valve trays.

c. Due to their more complex construction, valve and sieve trays have a higher maintenance cost than bubble cap trays.

d. For maximum flexibility, valve trays have the greatest turn down ratio (the ratio of the highest vapour flow rates to the lowest vapour flow rates).

Ratio of actual heat transfer to maximum possible heat transfer

How can you describe the effectiveness of heat exchanger?