MCQOPTIONS
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MCQOPTIONS
This section includes 2253 Mcqs, each offering curated multiple-choice questions to sharpen your Chemical Engineering knowledge and support exam preparation. Choose a topic below to get started.
| 1701. |
Work required for compression of a gas contained in a cylinder is 7000 kJ. During compression, heat interaction of 3000 kJ causes the surroundings to be heated. Internal energy change of the gas during the compression is __________ kJ. |
| A. | 4000 |
| B. | -4000 |
| C. | 10000 |
| D. | -10000 |
| Answer» B. -4000 | |
| 1702. |
Which of the following material handling equipments is not suitable for moving materials in varying paths ? |
| A. | Hand trolley |
| B. | Belt conveyor |
| C. | Crane |
| D. | Truck |
| Answer» C. Crane | |
| 1703. |
Protection of ship hulls against sea water corrosion is done by coating with zinc because of the fact that zinc compared to iron is |
| A. | reduced preferentially. |
| B. | cheaper. |
| C. | oxidised preferentially. |
| D. | lighter. |
| Answer» D. lighter. | |
| 1704. |
Which of the following properties of a solid is not dependent on crystal imperfection ? |
| A. | Ductility |
| B. | Semiconductiyity |
| C. | Melting point |
| D. | Yield stress |
| Answer» D. Yield stress | |
| 1705. |
Cadmium in zinc leach liquor is removed by cementation using |
| A. | zinc |
| B. | iron |
| C. | nickel |
| D. | copper |
| Answer» B. iron | |
| 1706. |
Addition of __________ to steel can not impart it high strength at elevated temperature. |
| A. | nickel |
| B. | magnesium |
| C. | silicon |
| D. | manganese |
| Answer» C. silicon | |
| 1707. |
Out of the following, the lowest packing of atoms exists in __________ crystal lattice structure. |
| A. | hexagonal close, packed (hcp) |
| B. | face centred cubic (fcc) |
| C. | body centred cubic (bcc) |
| D. | simple cubic |
| Answer» E. | |
| 1708. |
Moist climate is the most favourable factor in the site selection far a |
| A. | steel plant |
| B. | textile factory |
| C. | petroleum refinery |
| D. | coke oven battery |
| Answer» C. petroleum refinery | |
| 1709. |
Maximum consumption of limestone is in the __________ industry. |
| A. | iron and steel |
| B. | cement |
| C. | glass |
| D. | fertiliser |
| Answer» E. | |
| 1710. |
CANDU type nuclear reactor using natural uranium as fuel is the extensively used nuclear reactor because of the fact that the |
| A. | specific fuel consumption is very low due to the use of heavy water. |
| B. | fuel cost is much lower than that used in pressurised water or boiling water reactor. |
| C. | heavy water is used both as coolant as well as moderator. |
| D. | both 'b' & 'c' |
| Answer» E. | |
| 1711. |
The two elements required to form substitutional solid solution should not have |
| A. | same crystalline structure. |
| B. | same valancy |
| C. | widely differing electronegativity. |
| D. | same atomic sizes. |
| Answer» D. same atomic sizes. | |
| 1712. |
Which of the following is termed as the boiler mounting ? |
| A. | Superheater |
| B. | Economiser |
| C. | Blow off cock |
| D. | Feed pump |
| Answer» D. Feed pump | |
| 1713. |
Pressure gauges are never connected directly to the live steam line; rather a loop or syphon is interposed as close as possible to the pressure gauge. This is done to |
| A. | avoid the overheating of the tubes & bellows which operate them to minimise error and damage. |
| B. | form a seal of water by steam condensate to fill the tube or bellows at the pressure being measured. |
| C. | both 'a' & 'b'. |
| D. | avoid the static head error introduced by steam entry. |
| Answer» D. avoid the static head error introduced by steam entry. | |
| 1714. |
A furnace is made of a refractory brick wall of thickness 0.5 metre and thermal conductivity 0.7 W/m.°K For the same temperature drop and heat loss, this refractory wall can be replaced by a layer of diatomaceous earth of thermal conductivity 0.14 W/m.K and thickness __________ metre.$ |
| A. | 0.01 |
| B. | 0.1 |
| C. | 0.25 |
| D. | 0.5 |
| Answer» C. 0.25 | |
| 1715. |
The pressure outside a bubble/droplet of liquid is __________ the internal pressure. |
| A. | greater than |
| B. | less than |
| C. | equal to |
| D. | unpredictable ; depends on the bubble size |
| Answer» C. equal to | |
| 1716. |
The dimensional formula of bulk modulus of elasticity is same as that of the |
| A. | pressure |
| B. | density |
| C. | force |
| D. | none of these |
| Answer» B. density | |
| 1717. |
Basic open hearth furnace (BOF) is not used for producing __________ steel. |
| A. | killed |
| B. | rimming |
| C. | high alloy |
| D. | none of these |
| Answer» D. none of these | |
| 1718. |
LASER |
| A. | stands for Light Amplification by Stimulated Emission of Radiation. |
| B. | has the same intensity as visible light. |
| C. | can't be used for cutting metals. |
| D. | none of these. |
| Answer» B. has the same intensity as visible light. | |
| 1719. |
The machanism involved in the removal of metal in drilling operation is by |
| A. | compression |
| B. | extrusion |
| C. | shearing |
| D. | both 'b' & 'c' |
| Answer» E. | |
| 1720. |
Increasing sulphur content in pig iron tends to make it |
| A. | soft |
| B. | hard |
| C. | tough |
| D. | ductile & malleable |
| Answer» C. tough | |
| 1721. |
The cathode in an electrochemical cell always carries |
| A. | negative charge. |
| B. | positive charge. |
| C. | zero charge. |
| D. | positive or negative charge depending upon the nature of the cell. |
| Answer» B. positive charge. | |
| 1722. |
The radioactive isotope of hydrogen is |
| A. | deuterium |
| B. | tritium |
| C. | protium |
| D. | none of these |
| Answer» C. protium | |
| 1723. |
In chemical dehumidification of air |
| A. | both specific humidity & dry bulb temperature increases. |
| B. | both specific humidity & dry bulb temperature decreases. |
| C. | specific humidity decreases & dry bulb temperature increases. |
| D. | specific humidity increases & dry bulb temperature decreases. |
| Answer» D. specific humidity increases & dry bulb temperature decreases. | |
| 1724. |
Presence of sulphur in the fuel fired in a furnace |
| A. | contributes to its heating value. |
| B. | helps in electrostatic precipitation of ash from flue gases. |
| C. | corrodes ducts & air preheater, if the flue gas temperature is low. |
| D. | all 'a' , 'b' & 'c'. |
| Answer» E. | |
| 1725. |
Which of the following metals is the most prone to work hardening? |
| A. | Brass |
| B. | Aluminium |
| C. | Copper |
| D. | Lead |
| Answer» B. Aluminium | |
| 1726. |
The friction factor for the turbulent fluid flow in a rough pipe does not depend upon the |
| A. | pipe roughness & pipe diameter. |
| B. | fluid velocity. |
| C. | type of flowing fluid. |
| D. | both 'b' & 'c'. |
| Answer» E. | |
| 1727. |
Old cycle handles are coated with nickel using |
| A. | cementation. |
| B. | spray coating. |
| C. | galvanising process. |
| D. | tinning process. |
| Answer» C. galvanising process. | |
| 1728. |
Materials having __________ lattice structure are usually the most ductile. |
| A. | body centred cubic (bcc) |
| B. | hexagonal close packed (hcp) |
| C. | face centred cubic (fcc) |
| D. | none of these |
| Answer» D. none of these | |
| 1729. |
Rain drops falling through atmospheric air attain limited terminal velocity, because of |
| A. | upward thrust due to air. |
| B. | viscous force exerted by air. |
| C. | surface tension effects of water. |
| D. | force of gravity. |
| Answer» C. surface tension effects of water. | |
| 1730. |
Largest application of laser welding is in __________ welding. |
| A. | microspot |
| B. | under water |
| C. | precious metals |
| D. | heavy structure |
| Answer» B. under water | |
| 1731. |
Pick out the wrong statement about a fast breeder reactor. |
| A. | uses molten sodium as moderator. |
| B. | converts fertile fuel into fissile fuel. |
| C. | requires highly enriched fuel. |
| D. | produces more fuel than it consumes. |
| Answer» B. converts fertile fuel into fissile fuel. | |
| 1732. |
__________ pipe is the most suitable for carrying sanitary drainage. |
| A. | stainless steel |
| B. | Reinforced cement concrete |
| C. | Cast iron |
| D. | Asbestos cement |
| Answer» D. Asbestos cement | |
| 1733. |
Even though heat transfer co-efficients in boiling liquids is large, use of fins is advantageous, when the entire surface is exposed to __________ boiling. |
| A. | film |
| B. | nucleate |
| C. | transition |
| D. | all modes of |
| Answer» B. nucleate | |
| 1734. |
Out of the following, the rays having the lowest wavelength is the |
| A. | radio waves |
| B. | ultrasonic waves |
| C. | infra red rays |
| D. | X-rays |
| Answer» B. ultrasonic waves | |
| 1735. |
Consider the equilibrium A(g) + B(g) = AB(g). When the partial pressure of A is 10-2 atm, the partial pressure of B is 10-3 atm and the partial pressure of AB is 1 atm, the equilibrium constant 'K' is |
| A. | 10 atm-1 |
| B. | 105 atm-1 |
| C. | 10 (dimensionless) |
| D. | 105 (dimensionless) |
| Answer» C. 10 (dimensionless) | |
| 1736. |
Heating of ferromagnetic materials to a temperature above Curie temperature makes it |
| A. | insulator for heat & electricity transmission. |
| B. | ferritic. |
| C. | behave like paramagnetic materials. |
| D. | superconductor. |
| Answer» D. superconductor. | |
| 1737. |
A dense structure of grinding wheel is not used for the |
| A. | ductile material. |
| B. | hard materials. |
| C. | brittle materials. |
| D. | finishing cuts. |
| Answer» B. hard materials. | |
| 1738. |
Diffusion co-efficient of a metal in a solid solution depends upon its |
| A. | composition |
| B. | temperature |
| C. | both (a) & (b) |
| D. | neither (a) nor (b) |
| Answer» D. neither (a) nor (b) | |
| 1739. |
Joule-Thomson co-efficient is the ratio of |
| A. | pressure change to temperature change occuring during adiabatic compression of a gas. |
| B. | pressure change to temperature change occuring during adiabatic throttling of a gas. |
| C. | temperature change to pressure change occuring during adiabatic compression of a gas. |
| D. | temperature change to pressure change occuring during adiabatic throttling of a gas. |
| Answer» E. | |
| 1740. |
Multistage compression of air as compared to single stage compression offers the advantage of |
| A. | power saving per unit weight of air delivered. |
| B. | moisture elimination in the inter-stage cooler. |
| C. | increased volumetric efficiency. |
| D. | all (a), (b) & (c). |
| Answer» E. | |
| 1741. |
Suitability of steel for its use in cable is judged by its strength in |
| A. | tension |
| B. | compression |
| C. | torsion |
| D. | shear |
| Answer» B. compression | |
| 1742. |
Stainless steel is welded using |
| A. | oxy-acetylene flame. |
| B. | oxy-hydrogen flame. |
| C. | arc welding. |
| D. | inert gas arc welding. |
| Answer» E. | |
| 1743. |
Which of the following equipments is used for liquid dispersion ? |
| A. | Packed column |
| B. | Venturi scrubber |
| C. | Bubble cap plate column |
| D. | Wetted wall column |
| Answer» C. Bubble cap plate column | |
| 1744. |
Saturated steam at a pressure of 25 kg/cm2 is throttled to attain 5 kg/cm2 . Then the outcoming steam will be |
| A. | wet |
| B. | saturated |
| C. | superheated |
| D. | none of these |
| Answer» D. none of these | |
| 1745. |
Alloying elements present in Hayness stel-lite, which has superior performance than high speed steel, are |
| A. | nickel, cobalt & chromium. |
| B. | tungsten, chromium & cobalt. |
| C. | manganese, chromium & cobalt. |
| D. | tungsten, molybdenum & nickel. |
| Answer» C. manganese, chromium & cobalt. | |
| 1746. |
The kinematic viscosity (in stoke) and the absolute/dynamic viscosity (in poise) are the same for __________ at room temperature. |
| A. | air |
| B. | water |
| C. | mercury |
| D. | alcohol |
| Answer» C. mercury | |
| 1747. |
The highest stress that a material can withstand for a specified length of time without excessive deformation is called the __________ strength. |
| A. | creep |
| B. | endurance |
| C. | fatigue |
| D. | none of these |
| Answer» B. endurance | |
| 1748. |
Force between the molecules of the same substance is called __________ force. |
| A. | adhesive |
| B. | cohesive |
| C. | molecular |
| D. | Vander Walls |
| Answer» C. molecular | |
| 1749. |
The product (s) of roasting of a sulphide ore is (are) |
| A. | oxide only. |
| B. | sulphate only. |
| C. | oxide and sulphate. |
| D. | dependent on temperature and partial pressure of oxygen & sulphur dioxide. |
| Answer» B. sulphate only. | |
| 1750. |
Lowering of recrystallisation temperature of metals can be achieved by its |
| A. | grain refinement. |
| B. | purification. |
| C. | working at lower temperature. |
| D. | all a, b & c. |
| Answer» E. | |