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MCQOPTIONS
This section includes 8247 Mcqs, each offering curated multiple-choice questions to sharpen your Engineering knowledge and support exam preparation. Choose a topic below to get started.
| 5851. |
Methyl tertiary butyl ether (MTBE), a high octane (octane no. = 115) gasoline blending component is produced by the simple additive reaction of isobutylene with |
| A. | methyl alcohol |
| B. | ethyl alcohol |
| C. | methane |
| D. | ethane |
| Answer» B. ethyl alcohol | |
| 5852. |
LPG when brought to atmospheric pressure & temperature will be a |
| A. | liquid lighter than water. |
| B. | liquid heavier than water. |
| C. | gas lighter than air. |
| D. | gas heavier than air. |
| Answer» E. | |
| 5853. |
True vapour pressure of a petroleum fraction __________ Reid vapour pressure. |
| A. | is less than |
| B. | is more than |
| C. | is same as |
| D. | may be either more or less than |
| Answer» C. is same as | |
| 5854. |
Number of gram equivalent of solute dissolved in one litre of solution is called its |
| A. | normally |
| B. | molarity |
| C. | molality |
| D. | formality |
| Answer» B. molarity | |
| 5855. |
Which of the following is insensitive to changes in pressure ? |
| A. | Heat of vaporisation |
| B. | Melting point |
| C. | Heat of fusion |
| D. | Both (b) and (c) |
| Answer» E. | |
| 5856. |
Enthalpy of a vapor gas mixture may be increased by increasing the |
| A. | temperature at constant humidity. |
| B. | humidity at constant temperature. |
| C. | temperature and the humidity. |
| D. | all (a), (b) & (c). |
| Answer» E. | |
| 5857. |
Which of the following ideal gas laws are not applicable to mixture of gases ? |
| A. | Amgat's law |
| B. | Dalton's law |
| C. | Boyle's law & Charle's Law |
| D. | none of these |
| Answer» D. none of these | |
| 5858. |
With rise in temperature, the solubility of ammonia in water at a fixed pressure |
| A. | increases |
| B. | decreases |
| C. | remains unchanged |
| D. | increases exponentially |
| Answer» C. remains unchanged | |
| 5859. |
In a binary liquid system, the composition expressed as __________ is independent of the temperature & pressure. |
| A. | kg of solute/kg of solvent |
| B. | kg-mole of solute/kg-mole of solvent |
| C. | kg-mole of solute/1000 kg of solvent |
| D. | all (a), (b) & (c) |
| Answer» E. | |
| 5860. |
Claussius Clapeyron equation applies to the __________ process. |
| A. | sublimation |
| B. | melting |
| C. | vaporisation |
| D. | all (a), (b) & (c) |
| Answer» E. | |
| 5861. |
A liquid is in equilibrium with its vapor at its boiling point. On an average, the molecules in the liquid and gaseous phases have equal |
| A. | kinetic energy. |
| B. | intermolecular forces of attraction. |
| C. | potential energy. |
| D. | total energy. |
| Answer» B. intermolecular forces of attraction. | |
| 5862. |
In the reaction, represented by Na2CO3 + HC1 NaHO3 + NaCl, the equivalent weight of Na2CO3 is |
| A. | 53 |
| B. | 5.3 |
| C. | 106 |
| D. | 10.6 |
| Answer» D. 10.6 | |
| 5863. |
Pick out the correct conversion. |
| A. | 1 BTU =453.6 calories |
| B. | 1 BTU = 252 calories |
| C. | 1 calorie = 252 BTU |
| D. | 1 calorie = 453.6 BTU |
| Answer» C. 1 calorie = 252 BTU | |
| 5864. |
One kg of saturated steam at 100 C and 1.01325 bar is contained in a rigid walled vessel. It lias a volume of 1.673 m3. It cools to 98 C ; the saturation pressure is 0.943 bar ; one kg of water vapour under these conditions has a volume of 1.789 m3. The amount of water vapour condensed (in kg) is |
| A. | 0.0 |
| B. | 0.065 |
| C. | 0.1 |
| D. | 1.0 |
| Answer» C. 0.1 | |
| 5865. |
1 kg/cm2 is equal to |
| A. | 760 torr |
| B. | 1KPa |
| C. | 10 metres of water column |
| D. | 1 metre of water column |
| Answer» D. 1 metre of water column | |
| 5866. |
Which of the following gravity scales is used exclusively for liquids heavier than water ? |
| A. | Baumme scale |
| B. | Twaddel scale |
| C. | API scale |
| D. | none of these |
| Answer» C. API scale | |
| 5867. |
Recycling in a chemical process facilitates |
| A. | increased yield |
| B. | enrichment of product |
| C. | heat conservation |
| D. | all (a), (b) &(c) |
| Answer» E. | |
| 5868. |
In case of a continuous distillation column, increase in reflux ratio may result in the |
| A. | lower fixed charges for the column. |
| B. | greater cost for the reboiler heat supply. |
| C. | greater cost for the condenser coolant. |
| D. | all (a), (b) and (c). |
| Answer» E. | |
| 5869. |
At the following point for a given packing and set of fluids, the pressure drop per metre of packed height, with variation in fluid rates and operating pressure |
| A. | increases |
| B. | decreases |
| C. | remains same |
| D. | may increase or decrease depending upon the solubility of the gas in the liquid |
| Answer» D. may increase or decrease depending upon the solubility of the gas in the liquid | |
| 5870. |
In a shell and tube heat exchanger, triangular pitch arrangement as compared to square pitch arrangement |
| A. | results in higher shell side pressure drop. |
| B. | can accomodate less number of tubes for a given shell diameter. |
| C. | facilitates easier shell side cleaning; hence is more suitable for handling high dirt factor shell side fluid. |
| D. | creates relatively lower turbulence on the shell side resulting in lower shell side heat transfer co-efficient. |
| Answer» B. can accomodate less number of tubes for a given shell diameter. | |
| 5871. |
Pick out the wrong statement about routing of fluids in a shell and tube heat exchanger. |
| A. | The corrosive and fouling fluid should be preferably routed through the tubes. |
| B. | The viscous fluid should be routed through the shell side. |
| C. | Lower flow rate fluid should be routed through the shell side. |
| D. | Higher pressure fluid stream should be routed through the shell side. |
| Answer» E. | |
| 5872. |
Pick out the wrong statement pertaining to the design of a horizontal tube evaporator. |
| A. | It is unsuitable for concentrating those liquids, which form a scale or deposit salt. |
| B. | It is suitable for process, in which the final product is a liquor instead of solid. |
| C. | Its usual dimensions are: tube dia = 2-3 cms; evaporator body dia = 1-4 metres and evaporator height = 2.5-4 metres. |
| D. | Liquor flows inside the tube, while the steam is outside submerging the tube. |
| Answer» E. | |
| 5873. |
For storing hazardous chemicals in large storage tanks, the minimum safe distance between the two tanks should range between __________ times the tank diameter. |
| A. | 1 to 1.5 |
| B. | 2.5 to 3.5 |
| C. | 4 to 5 |
| D. | 6 to 8 |
| Answer» B. 2.5 to 3.5 | |
| 5874. |
In shell and tube heat exchangers, straight tie rods are used to |
| A. | hold baffle in space. |
| B. | fix the tubes in position. |
| C. | account for thermal strain. |
| D. | none of these. |
| Answer» B. fix the tubes in position. | |
| 5875. |
What is the slope of the operating line in the stripping section of a distillation column ? |
| A. | 0 |
| B. | |
| C. | > 1 |
| D. | < 1 |
| Answer» D. < 1 | |
| 5876. |
An increase in the liquid resistance to interphase mass transfer and a resultant reduction in plate efficiency is caused by |
| A. | an increase in liquid viscosity. |
| B. | an increase in relatived volatility for rectification columns. |
| C. | decrease in gas solubility for absorbers. |
| D. | all (a), (b) and (c). |
| Answer» E. | |
| 5877. |
Heat transfer co-efficient for a horizontal condenser as compared to a vertical condenser operating under similar conditions is |
| A. | same |
| B. | less |
| C. | about 3 times |
| D. | about 0.33 times |
| Answer» D. about 0.33 times | |
| 5878. |
What is the slope of the operating line in the rectifying section of a distillation coloumn ? |
| A. | 0 |
| B. | |
| C. | > 1 |
| D. | <1 |
| Answer» E. | |
| 5879. |
Joint efficiency (J) for a seamless pipe is |
| A. | 1 |
| B. | 0.85 |
| C. | 1.2 |
| D. | < 0.5 |
| Answer» B. 0.85 | |
| 5880. |
Back-trapping in a distillation column results due to |
| A. | low gas velocity. |
| B. | high gas velocity. |
| C. | excessive liquid gradient over the tray. |
| D. | low reflux ratio. |
| Answer» D. low reflux ratio. | |
| 5881. |
Liquid gradient over a tray can be minimised by |
| A. | providing a higher skirt clearance or a higher weir. |
| B. | decreasing the number of rows of caps through which the liquid flows or by decreasing the velocity of liquid flow past the caps or by reducing the distance along the tray through which the liquid must flow. |
| C. | using split flow, radial flow or cascade flow for column diameter large than 4 ft. |
| D. | all (a), (b) and (c). |
| Answer» E. | |
| 5882. |
Which of the following is used for primary crushing of very hard lumpy materials ? |
| A. | Toothed roll crusher |
| B. | Gyratory crusher |
| C. | Ball mill |
| D. | Tube mill |
| Answer» C. Ball mill | |
| 5883. |
Cement clinker is reduced to fine size by a |
| A. | roll crusher |
| B. | ball mill |
| C. | tube mill |
| D. | hammer mill |
| Answer» D. hammer mill | |
| 5884. |
Mixing of light fine powder such as insecticides is done by |
| A. | banbery mixer |
| B. | pug mill |
| C. | impact wheels |
| D. | kneader |
| Answer» D. kneader | |
| 5885. |
__________ conveyor is the most suitable for long distance transportation of cold, non-abrasive granular/irregular shape/fine materials. |
| A. | Bucket |
| B. | Belt |
| C. | Screw |
| D. | Apron |
| Answer» C. Screw | |
| 5886. |
Tank filter (e.g., Nutsch filter) is |
| A. | a high pressure filter. |
| B. | a continuous filter. |
| C. | used for small scale filtration work. |
| D. | a leaf filter. |
| Answer» D. a leaf filter. | |
| 5887. |
Filtration capacity of a rotary drum vacuum filter depends upon the |
| A. | cake thickness. |
| B. | characteristics of the feed slurry. |
| C. | both (a) & (b). |
| D. | neither (a) nor (b). |
| Answer» D. neither (a) nor (b). | |
| 5888. |
Grinding efficiency of a ball mill is of the order of __________ percent. |
| A. | 1-5 |
| B. | 40-50 |
| C. | 75-80 |
| D. | 90-95 |
| Answer» B. 40-50 | |
| 5889. |
Solid particles of different densities are separated by |
| A. | filters |
| B. | thickness |
| C. | cyclones |
| D. | sorting classifier |
| Answer» E. | |
| 5890. |
Ribbon blenders are exclusively meant for |
| A. | blending miscible liquids. |
| B. | non-flowing powder and thin pastes. |
| C. | bath mixing. |
| D. | continuous mixing. |
| Answer» C. bath mixing. | |
| 5891. |
Traces of liquid tar fog present in coke oven gas is separated using |
| A. | electrostatic precipitator |
| B. | cyclone separator |
| C. | strainer |
| D. | none of these |
| Answer» B. cyclone separator | |
| 5892. |
Cartridge filters are termed as 'edge' filters, because of the fact that the |
| A. | disks have very sharp edge. |
| B. | solids are not deposited at the edge of the disk. |
| C. | bulk of the solids are removed at the periphery of the disks. |
| D. | none of these. |
| Answer» D. none of these. | |
| 5893. |
Weber number is significant and is concerned with the |
| A. | solid-liquid mixing. |
| B. | liquid-liquid mixing. |
| C. | dispersion of liquid in liquid. |
| D. | suspension of solid in liquid. |
| Answer» D. suspension of solid in liquid. | |
| 5894. |
Velocity of a small particle of diameter 'Dp' at a distance 'r' from the rotational axis of a cyclone rotating at an angular speed ' ' is given by (the other symbols are as per standard notation) |
| A. | <img src="/_files/images/chemical-engineering/mechanical-operations/132-461-1.png"> |
| B. | <img src="/_files/images/chemical-engineering/mechanical-operations/132-461-2.png"> |
| C. | <img src="/_files/images/chemical-engineering/mechanical-operations/132-461-3.png"> |
| D. | <img src="/_files/images/chemical-engineering/mechanical-operations/132-461-4.png"> |
| Answer» E. | |
| 5895. |
Helical screw agitator is used for |
| A. | mixing highly viscous pastes. |
| B. | blending immiscible liquids. |
| C. | mixing liquids at very high temperature (> 250 C). |
| D. | none of these. |
| Answer» B. blending immiscible liquids. | |
| 5896. |
Pure nickel is |
| A. | ferromagnetic above its curie point (i.e., 415 C). |
| B. | having h.c.p. crystal lattice. |
| C. | ferromagnetic at room temperature. |
| D. | not resistant to oxidation at high temperature. |
| Answer» D. not resistant to oxidation at high temperature. | |
| 5897. |
Nickel is a constituent of |
| A. | bronze |
| B. | solder |
| C. | duralumin |
| D. | monel metal |
| Answer» E. | |
| 5898. |
Ability of a material to __________ is indicated by its damping capacity. |
| A. | withstand compression |
| B. | absorb vibration |
| C. | absorb shock |
| D. | none of these |
| Answer» C. absorb shock | |
| 5899. |
Maximum consumption of zinc is in |
| A. | alloying |
| B. | galvanising |
| C. | utensil manufacture |
| D. | electrical industry |
| Answer» C. utensil manufacture | |
| 5900. |
Steel balls for ball bearings are generally made of __________ steel. |
| A. | cast |
| B. | stainless |
| C. | free carbon |
| D. | carbon chrome |
| Answer» E. | |