MCQOPTIONS
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MCQOPTIONS
This section includes 806 Mcqs, each offering curated multiple-choice questions to sharpen your Chemical Engineering knowledge and support exam preparation. Choose a topic below to get started.
| 751. |
Which of the following have a same quantisation step throughout the range? |
| A. | linear |
| B. | PCM |
| C. | DPCM |
| D. | ADPCM |
| Answer» B. PCM | |
| 752. |
Which of the following defines the number of samples that are taken in time period? |
| A. | sample size |
| B. | sample nature |
| C. | sample rate |
| D. | sample frequency |
| Answer» D. sample frequency | |
| 753. |
How much voltage does the MC1489 can take ? |
| A. | 12V |
| B. | 5V |
| C. | 3.3V |
| D. | 2.2V |
| Answer» C. 3.3V | |
| 754. |
Which of the following model can implement circular buffer? |
| A. | dual address mode |
| B. | 1D model |
| C. | 2D model |
| D. | 3D model |
| Answer» C. 2D model | |
| 755. |
What is the full form of SPI in Basic? |
| A. | serial parallel interface |
| B. | serial peripheral interface |
| C. | sequential peripheral interface |
| D. | sequential port interface |
| Answer» C. sequential peripheral interface | |
| 756. |
Conversion increases with increase in temperature in case of a/an __________ reaction. |
| A. | Autocatalytic |
| B. | Irreversible |
| C. | Reversible endothermic |
| D. | Reversible exothermic |
| Answer» D. Reversible exothermic | |
| 757. |
Drills are usually made of |
| A. | Cermets |
| B. | High speed steel |
| C. | Alloy steel |
| D. | Tungsten carbide |
| Answer» C. Alloy steel | |
| 758. |
In fluid flow, and heat and mass transfer, one encounters (i) kinematic velocity (μ), (ii) molecular diffusivity (ζ) and thermal diffusivity (α). The units of these quantities are. |
| A. | μ , α and θ all have units of m/s |
| B. | μ , α and θ all have units of m2 /s |
| C. | α and θ have units of m2 /s, while μ has unit of m/s |
| D. | α and θ have units of m/s, while μ has unit of m2 /s |
| Answer» D. α and θ have units of m/s, while μ has unit of m2 /s | |
| 759. |
Addition of small amount of __________ to grey cast iron is done to produce nodular grey cast iron. |
| A. | Manganese |
| B. | Phosphorous |
| C. | Magnesium |
| D. | Chromium |
| Answer» D. Chromium | |
| 760. |
Fire in fuel gas pipelines is extinguished most effectively by |
| A. | Spraying water |
| B. | Blanketting the area with nitrogen atmosphere |
| C. | Fire fighting foam |
| D. | None of these |
| Answer» C. Fire fighting foam | |
| 761. |
Fibrous fracture is normally encountered in the __________ materials. |
| A. | Hard |
| B. | Elastic |
| C. | Ductile |
| D. | Brittle |
| Answer» D. Brittle | |
| 762. |
There are one octahedral void and __________ tetrahedral void in the closest packing of atoms |
| A. | One |
| B. | Two |
| C. | Three |
| D. | None of these |
| Answer» C. Three | |
| 763. |
The escape velocity of a body on earth which is independent of its mass is about __________ km/second. |
| A. | 3 |
| B. | 7 |
| C. | 11 |
| D. | 15 |
| Answer» D. 15 | |
| 764. |
Temper brittleness of a material can be fairly detected by the __________ test |
| A. | Fatigue |
| B. | Notched bar impact |
| C. | Tensile |
| D. | Hardness |
| Answer» C. Tensile | |
| 765. |
Magnetic permeability of iron is increased by its |
| A. | Decarburising |
| B. | Alloying with cobalt |
| C. | Purification |
| D. | Alternate heating & cooling |
| Answer» C. Purification | |
| 766. |
FeO (s) + CO (g) = Fe (s) + CO2 (g), k = 0. 435 at 1173E; at equilibrium, what will be the number of moles of CO gas required to reduce one mole of FeO at 1173 K? |
| A. | 1.0 |
| B. | 1.3 |
| C. | 2.3 |
| D. | 3.3 |
| Answer» E. | |
| 767. |
Which of the following is the most suitable material of construction for the condenser tubes, where the cooling medium is brine (salty water)? |
| A. | Aluminium |
| B. | Copper |
| C. | Titanium |
| D. | Stainless steel |
| Answer» D. Stainless steel | |
| 768. |
Broaching tools are usually made of |
| A. | Cermets |
| B. | High speed steel |
| C. | Tungsten carbide |
| D. | Stellite |
| Answer» C. Tungsten carbide | |
| 769. |
The main reducing agent in iron blast furnace is |
| A. | Carbon dioxide |
| B. | Carbon monoxide |
| C. | Oxygen |
| D. | Air |
| Answer» C. Oxygen | |
| 770. |
Pick out the wrong statement |
| A. | For a pressure vessel to be classified as thin vessel, the ratio of wall thickness to mean radius is less than 0.1 |
| B. | For calculating forces and efficiency of riveted joint, either rivet diameter or rivet hole diameter is used in case of pressure vessel and in structural work |
| C. | Longitudinal joint is normally made butt joint to maintain the circularity of the vessel |
| D. | Maximum diameter of the opening provided in a pressure vessel, which does not require any compensation is 200 mm |
| Answer» C. Longitudinal joint is normally made butt joint to maintain the circularity of the vessel | |
| 771. |
Which of the following is not the function of a volute casing provided in a centrifugal pump? |
| A. | To reduce the head loss in discharge |
| B. | To increase the pump efficiency |
| C. | To collect liquid from the periphery of the impeller and to transmit it to the delivery pipe at constant velocity |
| D. | To increase the pump discharge rate |
| Answer» E. | |
| 772. |
The elastic strain energy of a unit length of an edge dislocation as compared to that of a screw dislocation is |
| A. | More |
| B. | Equal |
| C. | Less |
| D. | Double |
| Answer» B. Equal | |
| 773. |
The capacity of a spring to store energy is called the spring form co-efficient. Stiffness of a spring is measured by the |
| A. | Ability to absorb shock |
| B. | Capacity to store energy |
| C. | Ratio of the wire & coil diameters |
| D. | Load to produce unit deflection |
| Answer» E. | |
| 774. |
A steam carrying pipeline is insulated with two layers of insulating materials with the inferior insulation material forming the inner part. If the two insulating layers are interchanged, the heat conducted will |
| A. | Increase |
| B. | Decrease |
| C. | Remain unaffected |
| D. | May increase or decrease; depends on the thickness of each layer |
| Answer» D. May increase or decrease; depends on the thickness of each layer | |
| 775. |
__________ is used as a material of construction for the blade of power saw. |
| A. | Wrought iron |
| B. | Stainless steel |
| C. | Stainless steel |
| D. | High speed steel |
| Answer» E. | |
| 776. |
The materials which fracture even at small strains are termed as brittle, while those materials which exhibit an appreciable deformation before failure are termed as |
| A. | Rigid |
| B. | Tough |
| C. | Ductile |
| D. | Plastic |
| Answer» D. Plastic | |
| 777. |
Addition of silicon to cast iron |
| A. | Promotes graphite module formation |
| B. | Improves its ductility |
| C. | Does not promote graphite flakes formation |
| D. | Increases the fluidity of molten metal |
| Answer» E. | |
| 778. |
Fatigue limit improvement by over stressing the metal by successively increasing the load is called coaxing. In fatigue failure, the material fails |
| A. | Below the yield point |
| B. | Above the yield point |
| C. | Below the elastic limit |
| D. | At the elastic limit |
| Answer» B. Above the yield point | |
| 779. |
The dew point temperature lines on psychrometric charts are straight inclined sloping downwards to the right. When relative humidity of moist air is 100%, then |
| A. | Wet bulb temperature=dry bulb temperature |
| B. | Wet bulb temperature=dew point temperature |
| C. | Saturation temperature=dew point temperature |
| D. | All a, b & c |
| Answer» E. | |
| 780. |
Out of the following, the best material capable of withstanding shock & vibration without the danger of cracking is |
| A. | Malleable iron |
| B. | Grey cast iron |
| C. | Chilled cast iron |
| D. | White cast iron |
| Answer» B. Grey cast iron | |
| 781. |
In an amorphous material, atoms defy any definite atomic structure and exist in random pattern just like in liquid. Which of the following is an amorphous material? |
| A. | Tin |
| B. | Lead |
| C. | Zinc |
| D. | Glass |
| Answer» E. | |
| 782. |
The most serious manufacturing defect from fracture toughness point of view is |
| A. | Surface roughness |
| B. | Pores |
| C. | Spherical inclusion |
| D. | Crack |
| Answer» E. | |
| 783. |
Air-petrol ratio for maximum power generation in spark ignition engine is about |
| A. | 6 : 1 |
| B. | 12 : 1 |
| C. | 18 : 1 |
| D. | 24 : 1 |
| Answer» C. 18 : 1 | |
| 784. |
__________ has the highest melting point out of the following. |
| A. | Tungsten |
| B. | Zirconium |
| C. | Molybdenum |
| D. | Tantalum |
| Answer» B. Zirconium | |
| 785. |
Babbitt lining is used on brass/bronze bearings to increase the |
| A. | Antifriction properties |
| B. | Compressive strength |
| C. | Bearing resistance |
| D. | Wear resistance |
| Answer» E. | |
| 786. |
Galvanic corrosion cannot be prevented by |
| A. | Cathodic protection |
| B. | Anodic protection |
| C. | Usage of largest possible anodic area |
| D. | Any one of these |
| Answer» C. Usage of largest possible anodic area | |
| 787. |
Window panes of aeroplanes are normally made of |
| A. | Perspex (PMMA) |
| B. | Teflon (PTFE) |
| C. | Bakelite (phenol formaldehyde) |
| D. | Polystyrene |
| Answer» B. Teflon (PTFE) | |
| 788. |
Silicon percentage in silicon steel used for electrical equipments is about |
| A. | 1 |
| B. | 4.0 |
| C. | 8 |
| D. | 14 |
| Answer» C. 8 | |
| 789. |
Which of the following test is used for distinguishing among dry oils, semi-drying oils and non drying oils? |
| A. | Elaiden test |
| B. | Reichert-Meissl value test |
| C. | Hunter value test |
| D. | Iodine value test |
| Answer» B. Reichert-Meissl value test | |
| 790. |
Pick out the correct statement. |
| A. | Materials exhibiting high elasticity obey Hookes law |
| B. | The elastic behaviour of rubber under compression is the same as its behaviour under tension |
| C. | The damping capacity of a material is due to its plastic deformation |
| D. | The stress required to cause plastic flow in polycrystalline material is higher as compared to monocrystalline materials due to the presence of grains of different orientations |
| Answer» C. The damping capacity of a material is due to its plastic deformation | |
| 791. |
Water flow in the river during flood can be categorised as the __________ flow. |
| A. | Unsteady uniform |
| B. | Unsteady non-uniform |
| C. | Steady uniform |
| D. | Steady non-uniform |
| Answer» C. Steady uniform | |
| 792. |
Fibre reinforced plastic (FRP) are |
| A. | Made of glass fibre and thermoplastic resins |
| B. | Anisotropic |
| C. | Made of thermosetting resin and glass fibre |
| D. | Both b & c |
| Answer» E. | |
| 793. |
Gratings is associated with the measurement of |
| A. | Linear displacement |
| B. | Concavity/convexity |
| C. | Surface texture |
| D. | Flatness |
| Answer» B. Concavity/convexity | |
| 794. |
Which of the following hardness tests does not measure the indentation hardness of metals and alloys? |
| A. | Vickers hardness test |
| B. | Shore scleroscope test |
| C. | Brinell hardness test |
| D. | Rockwell hardness test |
| Answer» C. Brinell hardness test | |
| 795. |
Normalising does not __________ of a metal. |
| A. | Improve machinability & tensile strength |
| B. | Remove internal stresses |
| C. | Refine the structure |
| D. | Remove strains caused by cold working |
| Answer» C. Refine the structure | |
| 796. |
Lap joints are preferred over butt joints in soldering/brazing, because these joints are |
| A. | Weaker in tension but stronger in shear |
| B. | Weaker in shear but stronger in tension |
| C. | Stronger in both shear and tension |
| D. | The lap joints are easily made |
| Answer» E. | |
| 797. |
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 | |
| 798. |
Laser welding is widely employed in the __________ industries. |
| A. | Electronic |
| B. | Structural |
| C. | Process |
| D. | Heavy |
| Answer» B. Structural | |
| 799. |
With increase in temperature, the electrical conductivity of semiconductors |
| A. | Increases |
| B. | Decreases |
| C. | Remain constant |
| D. | Either (A) or (B), depends on the type of semi-conductor |
| Answer» B. Decreases | |
| 800. |
Joining of thin foils is preferred to be done by |
| A. | Gamma rays |
| B. | X-rays |
| C. | Microwaves |
| D. | Gas welding |
| Answer» D. Gas welding | |