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.
| 1951. |
Maximum permissible air velocity in pipelines is about __________ metre/second. |
| A. | 5 |
| B. | 10 |
| C. | 20 |
| D. | 40 |
| Answer» C. 20 | |
| 1952. |
Resistance of an electrical conductor is proportional to its (where, l = length and A = cross-sectional area of the conductor) |
| A. | A |
| B. | l |
| C. | A2 |
| D. | both 'a' & 'b' |
| Answer» E. | |
| 1953. |
Specific gravity of a metal, which weighs 5 kg in air and 4 kg when submerged in water, will be |
| A. | 5 |
| B. | 1.25 |
| C. | 2.5 |
| D. | 3.75 |
| Answer» B. 1.25 | |
| 1954. |
Which of the following parameters is not responsible for the heat loss from a hot steam carrying bare pipe surface located in a room without fans ? |
| A. | Emissivity of pipe surface. |
| B. | Diameter & length of the pipe. |
| C. | Temperature of hot pipe surface & that of air in the room. |
| D. | none of these. |
| Answer» E. | |
| 1955. |
Boiling point of water gets lowered at high altitudes (e.g., hills), because |
| A. | temperature is low. |
| B. | atmospheric pressure is low. |
| C. | atmospheric pressure is high. |
| D. | none of these. |
| Answer» C. atmospheric pressure is high. | |
| 1956. |
The routing function in a production system design is concerned with the |
| A. | material flow optimisation through the plant. |
| B. | machine utilisation. |
| C. | quality control of the product. |
| D. | manpower utilisation. |
| Answer» C. quality control of the product. | |
| 1957. |
Wrought iron is never shaped by |
| A. | casting |
| B. | cold working |
| C. | forging |
| D. | welding |
| Answer» B. cold working | |
| 1958. |
The function of a nozzle provided in steam turbine is to |
| A. | throttle down (i.e., reduce) the pressure of steam. |
| B. | convert internal energy into kinetic energy. |
| C. | increase the velocity of steam. |
| D. | all (a), (b) & (c). |
| Answer» E. | |
| 1959. |
Regeneration of molecular seive requires it to be heated to a temperature of about __________ °C.$ |
| A. | 80-120 |
| B. | 200-300 |
| C. | 600-800 |
| D. | 1000-1100 |
| Answer» E. | |
| 1960. |
Out of the following, which will fracture most readity, when hit with a hard hammer ? |
| A. | Brass |
| B. | Bronze |
| C. | German silver |
| D. | Cast iron |
| Answer» E. | |
| 1961. |
Other parameters remaining same, the recrystallisation temperature of an alloy is lowered, when |
| A. | strain rate is increased. |
| B. | grain size is increased. |
| C. | prior cold deformation is increased. |
| D. | not affected by any of the above parameters. |
| Answer» B. grain size is increased. | |
| 1962. |
Which of the following is not a principal alloying element for the structural steel? |
| A. | Molybednum |
| B. | Nickel |
| C. | Manganese |
| D. | Chromium |
| Answer» B. Nickel | |
| 1963. |
Cemented carbide tools are not suitable for cutting |
| A. | aluminium |
| B. | brass |
| C. | cast iron |
| D. | steel |
| Answer» B. brass | |
| 1964. |
Photographic plates are coated with |
| A. | silver nitrate |
| B. | silver halide |
| C. | calcium silicate |
| D. | metallic silver |
| Answer» C. calcium silicate | |
| 1965. |
A metal having a Poisson's ratio = 0.3 is elastically deformed under uniaxial tension. If the longitudinal strain = 0.8, then the magnitude of thickness strain is |
| A. | -0.8 |
| B. | 0.8 |
| C. | 0.08 |
| D. | -0.24 |
| Answer» E. | |
| 1966. |
__________ of air does not increase with increase in temperature. |
| A. | Density |
| B. | Thermal diffusivity |
| C. | Viscosity |
| D. | Thermal conductivity |
| Answer» B. Thermal diffusivity | |
| 1967. |
Out of the following surfaces, the emis-sivity will be minimum for |
| A. | aluminium foil |
| B. | concrete |
| C. | plaster |
| D. | smooth glass |
| Answer» C. plaster | |
| 1968. |
Commonly used flux for brazing is |
| A. | zinc chloride |
| B. | borax |
| C. | ammonium chloride |
| D. | rosin |
| Answer» C. ammonium chloride | |
| 1969. |
The hardenability of steel decreases with |
| A. | decrease in dislocation density. |
| B. | increase in solutionising temperature. |
| C. | increase in strength. |
| D. | decrease in grain size. |
| Answer» E. | |
| 1970. |
Turning/machining of __________ usually does not require any cutting fluid. |
| A. | cast iron |
| B. | stainless steel |
| C. | mild steel |
| D. | copper |
| Answer» B. stainless steel | |
| 1971. |
With increase in impurities in metals, their corrosion resistances |
| A. | increase |
| B. | decrease |
| C. | remain same |
| D. | may increase or decrease ; depending on the type of metal |
| Answer» C. remain same | |
| 1972. |
Lead is poured into the joint between two- __________ pipes. |
| A. | mild steel |
| B. | concrete |
| C. | cast iron |
| D. | asbestos cement |
| Answer» D. asbestos cement | |
| 1973. |
The amount of different substances produced, when the same quantity of electricity is passed through different solutions are proportional to their |
| A. | equivalent weight. |
| B. | (equivalent weight)2. |
| C. | molecular weight. |
| D. | (molecular weight)2. |
| Answer» B. (equivalent weight)2. | |
| 1974. |
Sudden fall of atmospheric pressure by a large amount is an indication of the |
| A. | rain |
| B. | cold wave |
| C. | storm |
| D. | fair weather |
| Answer» D. fair weather | |
| 1975. |
Tumbling is the process of improving the __________ of the materials/parts. |
| A. | surface finish |
| B. | fatigue limit |
| C. | creep limit |
| D. | surface cleanlineses |
| Answer» E. | |
| 1976. |
Which of the following metals can be extracted from its ore by both pyrometallur-gical as well as hydrometallurgical methods ? |
| A. | Copper |
| B. | Zinc |
| C. | both 'a' & 'b' |
| D. | neither 'a' nor 'b' |
| Answer» D. neither 'a' nor 'b' | |
| 1977. |
__________ method of depreciation calculation ensures that the interest is charged on the cost of machine asset every year on the book value, but the rate of depreciation remains constant every year. |
| A. | Annuity charging |
| B. | Atraight line |
| C. | Ainking fund |
| D. | None of these |
| Answer» C. Ainking fund | |
| 1978. |
Wave length of X-rays is about 1 angstron, however it can not pass through a sheet of |
| A. | paper |
| B. | cloth |
| C. | lead |
| D. | aluminium |
| Answer» D. aluminium | |
| 1979. |
An alloy of Fe - 0.4 % C is |
| A. | cast iron. |
| B. | hypo-eutectoid steel. |
| C. | hyper-eutectoid steel. |
| D. | eutectoid steel |
| Answer» C. hyper-eutectoid steel. | |
| 1980. |
Laser is a device to produce |
| A. | gamma rays. |
| B. | microwaves. |
| C. | a beam of white light. |
| D. | a beam of coherent light. |
| Answer» E. | |
| 1981. |
A material expanding freely due to heating will develop __________ stress. |
| A. | no |
| B. | compressive |
| C. | tensile |
| D. | thermal |
| Answer» B. compressive | |
| 1982. |
Transformation range for ferrous material is the temperature interval during which __________ is formed during its heating. |
| A. | cementite |
| B. | austenite |
| C. | martensite |
| D. | pearlite |
| Answer» C. martensite | |
| 1983. |
Pipelines carrying various utilities in chemical industries are identified by their colour codes. The color of pipeline carrying steam is |
| A. | black |
| B. | silver grey |
| C. | green |
| D. | yellow |
| Answer» C. green | |
| 1984. |
Castability of aluminium is increased by the addition of __________ in it. |
| A. | silicon |
| B. | manganese |
| C. | bismuth |
| D. | lead |
| Answer» B. manganese | |
| 1985. |
Probability of cavitation occuring becomes very high, when the local __________ resulting in water bubbles formation, which on rupture cause cavitation |
| A. | pressure falls below the vapour pressure |
| B. | pressure becomes very high |
| C. | temperature becomes low |
| D. | all 'a', 'b' & 'c' |
| Answer» E. | |
| 1986. |
Wood is a/an __________ material. |
| A. | amorphous |
| B. | cellular |
| C. | homogeneous |
| D. | grannular |
| Answer» C. homogeneous | |
| 1987. |
In connection with corrosion of metals, passivation is the process that |
| A. | intensifies deterioration. |
| B. | changes the composition of the metal. |
| C. | inhibits further deterioration. |
| D. | none of these. |
| Answer» D. none of these. | |
| 1988. |
Dielectric |
| A. | is an electrical insulating material. |
| B. | of low resistivity is preferred. |
| C. | should have high thermal conductivity. |
| D. | need not defy the corrosive action of chemicals. |
| Answer» B. of low resistivity is preferred. | |
| 1989. |
__________ circuit is most commonly used to measure strain with the help of a strain gauge. |
| A. | Ballast |
| B. | Voltage balancing potentiometric |
| C. | Simple current sensitive |
| D. | none of these |
| Answer» C. Simple current sensitive | |
| 1990. |
The most economical channel section for the fluid flow is the one for which the discharge is maximum for a given cross-sectional area. Vertical velocity distribution in an open channel for laminar flow can be assumed to be |
| A. | parabolic |
| B. | hyperbolic |
| C. | straight line |
| D. | none of these |
| Answer» B. hyperbolic | |
| 1991. |
At 100% relative humidity, the dew point temperature of moist air is |
| A. | less than the wet bulb temperature. |
| B. | more than the wet bulb temperature. |
| C. | equal to the wet bulb temperature. |
| D. | equal to the ambient temperature. |
| Answer» C. equal to the wet bulb temperature. | |
| 1992. |
Addition of __________ to steel does not help in improving its machinability. |
| A. | sulphur |
| B. | silicon |
| C. | lead |
| D. | phosphorous |
| Answer» C. lead | |
| 1993. |
In a drilling process, the metal is removed by both shearing & extrusion. General purpose drills are made of |
| A. | stainless steel |
| B. | mild steel |
| C. | high speed steel |
| D. | high carbon steel |
| Answer» D. high carbon steel | |
| 1994. |
Maxwell's thermodynamic relations applies to the |
| A. | chemical systems in equilibrium. |
| B. | mechanical systems in equilibrium. |
| C. | irreversible thermodynamic processes. |
| D. | reversible thermodynamic processes. |
| Answer» B. mechanical systems in equilibrium. | |
| 1995. |
The total frictional resistance to fluid flow does not depend upon the |
| A. | roughness of the surface. |
| B. | fluid pressure. |
| C. | fluid density. |
| D. | fluid velocity. |
| Answer» C. fluid density. | |
| 1996. |
In 18-4-1 high speed steel, 18, 4 & 1 respectively denote the percentage of |
| A. | chromium, tungsten & vanadium. |
| B. | tungsten, chromium & vanadium. |
| C. | tungsten, vanadium & chromium. |
| D. | tungsten, chromium & molybdenum. |
| Answer» C. tungsten, vanadium & chromium. | |
| 1997. |
The speed of sound will be maximum in |
| A. | vacuum |
| B. | metal |
| C. | air |
| D. | water |
| Answer» C. air | |
| 1998. |
The refrigerant freon-12 is chemically |
| A. | CCl2F2 |
| B. | CCl3F |
| C. | CClF3 |
| D. | CCl4F |
| Answer» B. CCl3F | |
| 1999. |
Which of the following approaches the ideal gas behaviour most closely ? |
| A. | Wet steam |
| B. | Saturated steam |
| C. | Superheated steam |
| D. | Saturated water |
| Answer» D. Saturated water | |
| 2000. |
Wrought iron does not have |
| A. | uniform strength in all directions. |
| B. | ability to hold protective coating. |
| C. | high ductility & corrosion resistance. |
| D. | easily weldable characteristics. |
| Answer» B. ability to hold protective coating. | |