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This section includes InterviewSolutions, each offering curated multiple-choice questions to sharpen your knowledge and support exam preparation. Choose a topic below to get started.
| 95551. |
Which of the following is the heaviest?(a) White(b) Brass(c) Cast Iron(d) Aluminium |
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Answer» Right choice is (b) Brass Easy explanation: Aluminium and White metal are considered to be one of the lightest metals and alloys, whereas brass and cast irons are considered to be heavy materials. But, even among the two, brass is heavier than cast iron. |
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| 95552. |
The following is a competitive antagonist of GABA but a noncompetitive antagonist of diazepam: A. Picrotoxin B. Muscimol C. FlumazenilD. Bicuculline |
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Answer» D. Bicuculline |
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| 95553. |
Drug cumulation is the basis of organ toxicity of the following drug when used for prolonged periods: A. Prednisolone B. Chloroquine C. Aspirin D. Hydralazine |
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Answer» B. Chloroquine |
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| 95554. |
The essential feature in drug addiction is: A. Physical dependence B. Psychological dependence C. Both physical and psychological dependence D. Psychiatric abnormality |
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Answer» B. Psychological dependence |
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| 95555. |
The following is not a feature of competitive antagonists: A. Chemical resemblance with the agonist B. Parallel rightward shift of the agonist log doseresponse curve C. Suppression of maximal agonist response D. Apparent reduction in agonist affinity for the receptor |
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Answer» C. Suppression of maximal agonist response |
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| 95556. |
Which of the following pattern making machine makes wooden board?(a) Jointer(b) Drill press(c) Mortiser(d) Scroll saw |
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Answer» Right answer is (a) Jointer The best explanation: A jointer or hand planer has its use in producing wooden boards and planks. Basically, a plane of uniform thickness. |
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| 95557. |
Study of drug-receptor interaction has now shown that: A. Maximal response occurs only when all receptors are occupied by the drug B. Drugs exert an ‘all or none’ action on a receptor C. Receptor and drugs acting on it have rigid complementary ‘lock and key’ structural features D. Properties of ‘affinity’ and ‘intrinsic activity’ are independently variable |
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Answer» D. Properties of ‘affinity’ and ‘intrinsic activity’ are independently variable |
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| 95558. |
The following statement is true in relation to ‘drug toxicity’ and ‘poisoning’: A. The two terms are synonymous B. When a toxic effect requires specific treatment, it is called poisoning C. A toxic effect which endangers life by markedly affecting vital functions is called poisoningD. Toxicity is caused by drugs while poisoning is caused by other harmful chemicals |
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Answer» C. A toxic effect which endangers life by markedly affecting vital functions is called poisoning |
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| 95559. |
Agonist induced auto phosphorylation, internalization and down regulation is a distinctive feature of: A. G-protein coupled receptors B. Intrinsic ion channel containing receptors C. Tyrosine protein kinase receptors D. Receptors regulating gene expression |
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Answer» C. Tyrosine protein kinase receptors |
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| 95560. |
Drugs acting through receptors exhibit the following features except: A. Structural specificity B. High potency C. Competitive antagonism D. Dependence of action on lipophilicity |
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Answer» D. Dependence of action on lipophilicity |
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| 95561. |
What is true in relation to drug receptors: A. All drugs act through specific receptorsB. All drug receptors are located on the surface of the target cells C. Agonists induce a conformationa change in the receptor D. Partial agonists have low affinity for the receptor |
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Answer» C. Agonists induce a conformational change in the receptor |
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| 95562. |
Which colour is given to the cast surfaces which are to be left not-machined?(a) Red(b) Blue(c) Black(d) Yellow |
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Answer» Right option is (c) Black The explanation: Provision of colour scheme makes it easy for one to detect the part and the operation to be performed on it. According to the American pattern colour scheme, black colour is to be given for cast surface left to be not-machined. |
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| 95563. |
A receptor which itself has enzymatic property is: A. Insulin receptor B. Progesterone receptor C. Thyroxine receptor D. Glucagon receptor |
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Answer» A. Insulin receptor |
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| 95564. |
Select the receptor that is located intracellularly: A. Opioid μ receptor B. Steroid receptor C. Prostaglandin receptor D. Angiotensin receptor |
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Answer» B. Steroid receptor |
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| 95565. |
Which of the following is a perfect composition for medium carbon steel?(a) Upto 0.3%(b) 0.3-0.6%(c) 0.6-1.7%(d) 1.7-3% |
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Answer» Right choice is (b) 0.3-0.6% For explanation: The sequence of composition is in order from low carbon steel to high carbon steel till 1.7% carbon. Medium carbon steel belongs to a region of 0.3-0.6% carbon. |
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| 95566. |
The following receptor has an intrinsic ion channel: A. Histamine H1 receptor B. Histamine H2 receptor C. Adrenergic alfa receptor D. GABA-benzodiazepine receptor |
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Answer» D. GABA-benzodiazepine receptor |
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| 95567. |
A draft allowance is provided to ___________(a) All linear faces(b) Only the interior dimensions(c) Only the exterior dimensions(d) Only the dimensions that are perpendicular to the parting plane |
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Answer» The correct choice is (d) Only the dimensions that are perpendicular to the parting plane Easiest explanation: The draft allowance is used for those dimensions which are perpendicular to the parting plane, to give out a tapered face which is machined later. |
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| 95568. |
Receptors perform the following function/functions: A. Ligand recognition B. Signal transduction C. Both ligand recognition and signal transduction D. Disposal of agonists and antagonists |
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Answer» C. Both ligand recognition and signal transduction |
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| 95569. |
Design of pattern elements and method of jointing depend on?(a) Strength(b) Hardness(c) Ductility(d) Brittleness |
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Answer» Correct choice is (a) Strength To explain: The design of the elements of pattern and its method of joining depends on the strength and the accuracy to which the pattern has to be made. |
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| 95570. |
What is the function of cores in the casting process?(a) To support the pattern(b) To provide differential cooling rates at specific portions(c) To make holes and cavities(d) For ease of flow of the molten material |
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Answer» The correct choice is (c) To make holes and cavities The explanation is: Cores are the elements used to provide hollow cavities and holes in the pattern which are difficult or non profitable to be given after the casting is done by machining. |
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| 95571. |
The following receptor type has 7 helical membrane spanning amino acid segments with 3 extracellular and 3 intracellular loops: A. Tyrosine protein kinase receptor B. Gene expression regulating receptor C. Intrinsic ion channel containing receptor D. G protein coupled receptor |
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Answer» D. G protein coupled receptor |
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| 95572. |
The life of a pattern is most likely to depend upon which of the following term?(a) Number of castings produced(b) Type of cooling rate of the casting(c) Size of the casting(d) Size of the pattern |
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Answer» Right choice is (a) Number of castings produced The explanation is: Obviously, the more casting produced means more exposure of the pattern to the elevated temperature of molten metals and hence, slowly causing distortion to the sand grains as well as the pattern material. |
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| 95573. |
Riser for a sand casting can be designed using ___________(a) Modulus method(b) Cained method(c) Naval research laboratory method(d) All of the mentioned |
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Answer» The correct option is (d) All of the mentioned The explanation is: The three of these methods- modulus, Cained and NRLM are used to calculate and design Riser for a sand casting. |
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| 95574. |
The quality of the final product is not dependent on _______________(a) Method of withdrawal of pattern(b) Allowance provided to the pattern(c) The complexity of the casting(d) The metal used in Casting |
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Answer» The correct choice is (d) The metal used in Casting Easy explanation: Metal used in casting is a concern till its viscosity affect the flow or occupation to the cavity. This does not affect the final product physically, once the metal has solidified. |
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| 95575. |
Which sand is used for making ferrous and non-ferrous alloys?(a) Natural sand(b) Synthetic sand(c) Loam sand(d) Refractory sand grain |
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Answer» Right answer is (b) Synthetic sand The explanation: Natural sands are used for casting ferrous and non-ferrous metals while synthetic sands are used for casting ferrous and non-ferrous alloys. |
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| 95576. |
What will be the machining allowance for a bore of a 405mm cast iron object to be casted?(a) 1.0mm(b) 2.0mm(c) 3.0mm(d) 5.0mm |
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Answer» Correct answer is (d) 5.0mm For explanation I would say: The machining allowance for cast iron of various dimensions is shown in the table below. DIMENSIONS(mm) ALLOWANCE(mm) BORE SURFACE COPE SIDE upto 300 3.0 3.0 5.5 301-500 5.0 4.0 6.0 501-900 6.0 5.0 6.0 |
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| 95577. |
Name the missing part of the pattern in the diagram labelled as (?)?(a) Core(b) Riser(c) Sprue(d) Mould cavity |
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Answer» Correct option is (a) Core Explanation: The illustrated part in the diagram is core. The core in a pattern is used to create holes or hollow cavities. |
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| 95578. |
Which type of forces stretch and distort the bubbles?(a) Shear forces(b) Strain forces(c) Surface tension(d) Frictional forces |
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Answer» Right choice is (a) Shear forces The explanation: Shear forces in turbulent eddies stretch and distort the bubbles and break them into smaller sizes; at the same time, surface tension at the gas-liquid interface tends to restore the bubbles to their spherical shape. In the case of solid material such as cell flocs or aggregates, shear forces in turbulent flow are resisted by the mechanical strength of the particles. |
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| 95579. |
Which of the following is not a source of moulding sand?(a) Sea(b) Lakes(c) Desert(d) Forests |
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Answer» Correct option is (d) Forests Explanation: There are a variety of soils which can be found in forests. But the soils found there cannot be used for casting purposes. Hence forests are not a source for finding moulding sand, whereas sea, lakes and deserts are a source of finding them. |
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| 95580. |
A mallet comes under which type of tool?(a) Drilling tool(b) Clamping tool(c) Other pattern maker’s tool(d) Sawing tool |
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Answer» Correct option is (c) Other pattern maker’s tool For explanation I would say: A mallet comes under other pattern maker’s tool, as this tool cannot be used for drilling, clamping or sawing or any other classified purpose. |
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| 95581. |
Which of the following method(s) is obsolete for storing fragile patterns?(a) They must be stored in kerosene(b) They must be stored in wax plated shelves(c) They must be stored in a wood wardrobe(d) They must be stored in foam |
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Answer» The correct choice is (d) They must be stored in foam To explain: Foam has the ability to absorb shocks and sudden impacts to a very higher extent. Hence, Fragile patterns are stored while wrapped in foam. |
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| 95582. |
The following diagram shows the application of which of the allowances given to a pattern?(a) Shrinkage allowance(b) Draft allowance(c) Shake allowance(d) Distortion allowance |
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Answer» Correct answer is (b) Draft allowance Explanation: Draft allowance is given so as to ease the removal of casting from the pattern without damaging the pattern. Hence, tapering the vertical faces with some draft allowance is provided which is machined later. |
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| 95583. |
Which of the following is ‘not’ an allowance given to the pattern for casting?(a) Shrinkage(b) Draft(c) Hole(d) Machining |
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Answer» The correct option is (c) Hole The explanation is: A hole is made during the machining or finishing of the casting and is not a type of allowance given to the pattern. |
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| 95584. |
Which is the most frequently used impeller in the fermentation industry regarded as 6- flat-blade disc-mounted turbine?(a) Propeller turbine(b) Rushton turbine(c) Bladeless turbine(d) Screw turbine |
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Answer» Correct answer is (b) Rushton turbine To elaborate: The Rushton turbine is a radial flow impeller used for many mixing applications (commonly for gas dispersion applications). The design is based on a flat disk with vertical flat blades vertically mounted. |
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| 95585. |
Which of the following parts is used to keep the casting in for reducing the finishing allowance?(a) Centrifuge(b) Burette(c) Drag flask(d) Conical flask |
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Answer» The correct answer is (c) Drag flask The explanation: In finishing allowance, the entire casting is put in the drag flask to reduce the finishing allowance such that the dimensional variation and other defects due to the parting plane are reduced to a minimum. This part is widely used in the casting process to make the casting economical and sustainable. |
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| 95586. |
The current in each branch of a parallel circuit is proportional to _________(a) The amount of time the circuit is on for(b) Proportional to the value of the resistors(c) Equal in all branches(d) Proportional to the power in the circuit |
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Answer» The correct answer is (b) Proportional to the value of the resistors Explanation: I=V/R. In a parallel circuit, the voltage across each resistor is equal, hence the value of the current is proportional (inversely) to the value of the resistance. |
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| 95587. |
A substance of mass M kg requires a power input of P wants to remain in the molten state at its melting point. When the power source is turned off, the sample completely solidifies in time t seconds. The latent heat of fusion of the substance is …….A. `(Pm)/(t)`B. `(Pt)/(m)`C. `(m)/(Pt)`D. `(t)/(Pm)` |
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Answer» Correct Answer - D Self energy of solid sphere `E=-(3)/(5)(GM^(2))/(R )` and mass `M=(4)/(3)piR^(3)p " "therefore E prop R^(5)` |
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| 95588. |
What is the width of baffle in order of the tank diameter used for mixing?(a) 1/5- 1/10(b) 1/12-1/15(c) 1/10-1/12(d) 1/5-1/12 |
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Answer» The correct answer is (c) 1/10-1/12 To explain: The optimum baffle width depends on the impeller design and fluid viscosity but is of the order 1/10-1/12 the tank diameter. |
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| 95589. |
What do you mean by incompressible flow?(a) Temperature is constant(b) Density is constant(c) Pressure is constant(d) Velocity is constant |
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Answer» Right choice is (b) Density is constant Best explanation: In fluid mechanics or more generally continuum mechanics, incompressible flow (isochoric flow) refers to a flow in which the material density is constant within a fluid parcel an infinitesimal volume that moves with the flow velocity. |
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| 95590. |
Which of the following factors do not determine the Blood viscosity?(a) Color(b) Erythrocyte deformability(c) Plasma viscosity(d) Temperature |
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Answer» Right option is (a) Color To explain I would say: Five primary factors determine blood viscosity. These include hematocrit, erythrocyte deformability, plasma viscosity, erythrocyte aggregation, and temperature. Hematocrit is the most obvious determinant of WBV. A higher percentage of red blood cells (RBCs) results in thicker blood. |
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| 95591. |
From which of the following processes, only the input of the material is allowed but not output?(a) Batch process(b) Fed-Batch process(c) Semi-Batch process(d) Continuous process |
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Answer» The correct option is (b) Fed-Batch process The best I can explain: In fed-batch process, nothing is removed from the reactor during the process, but one substrate component is added in order to control the reaction rate by its concentration. In a fed-batch process, a basal medium supports initial growth and production, and a feed medium prevents depletion of nutrients and sustains the production phase. |
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| 95592. |
In solidification of a riser, which of the following cannot be used for insulation?(a) Insulation powder(b) Insulation sleeve(c) Insulation pad(d) Insulation clip |
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Answer» The correct choice is (d) Insulation clip The best explanation: For delaying the solidification in risers, insulation is done. Insulation powder, insulation sleeve and insulation pad can be used, but not an insulation clip. |
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| 95593. |
Two metal strips that constitute a thermostat must necessarily differ in their _______________(a) Mass(b) Length(c) Resistivity(d) Coefficient of linear expansion |
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Answer» The correct choice is (d) Coefficient of linear expansion To explain: Thermostat is used in electric apparatus like a refrigerator, Iron etc for automatic cut off. Therefore for metallic strips to bend on heating their coefficient of linear expansion should be different. |
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| 95594. |
Which of the following insulations slows down the radiation losses?(a) Insulation powder(b) Insulation sleeve(c) Insulation pad(d) Insulation clip |
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Answer» The correct option is (a) Insulation powder The best I can explain: Insulation powder is used for slowing down the process of retardation of radiation losses from the surface of the metal in the riser. |
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| 95595. |
Which of the following materials has superior strength and rigidity at high elevated temperature?(a) Aluminium-based alloys(b) Copper-based alloys(c) Zinc-based alloys(d) Nickel-based alloys |
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Answer» Right answer is (d) Nickel-based alloys Explanation: In the high temperature technology, the need for materials with superior strength, ductility and rigidity has been growing. Nickel-based alloys are the most widely used materials at the high elevated temperature, and super-alloys of it, are the greatest in the mechanical properties. |
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| 95596. |
The lag phase constitute of _________(a) No change in number, but an increase in mass(b) Change in number but decrease in mass(c) No change in number and decrease in mass(d) Constant number and mass |
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Answer» Right answer is (a) No change in number, but an increase in mass To explain I would say: The lag phase is the time period when there is no immediate increase in cell number of microorganisms as they are introduced into fresh culture medium. The microorganisms during this phase are trying to acclimatize to the new culture medium as it may be different from the previous one in which the microorganism was growing. Typically cells in the lag period are synthesizing RNA, enzymes, and essential metabolites that might be missing from their new environment (such as growth factors or macromolecules), as well as adjusting to environmental changes such as changes in temperature, pH, or oxygen availability. They can also be undertaking any necessary repair of injured cells. |
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| 95597. |
Quasi – steady state in fed batch is when?(a) Growth rate remains constant(b) Dilution remains constant(c) Growth rate changes variably(d) μ remains constant |
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Answer» Right answer is (c) Growth rate changes variably Easy explanation: The major difference between the steady state of a chemostat and the quasi steady state of a fed batch culture is that μ is constant in the chemostat but decreases in fed-batch. However, in the genuine steady state of a chemostat, dilution rate and growth rate are constant whereas in a fed-batch quasi steady state they change over the time of fermentation. |
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| 95598. |
Which of the following is not a reversible reaction?(a) Formation of NH3 rate(b) Decomposition of NH3 rate(c) Decomposition of potassium chlorate(d) Reaction of gaseous hydrogen with iodine vapors |
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Answer» Correct option is (c) Decomposition of potassium chlorate Explanation: Chemical reactions in which the products thus formed during a chemical change do not combine and produce back the reactants are better known as irreversible reactions. Decomposition of potassium chlorate into potassium chloride and oxygen after heating. In the above reaction however, the products are not combining to form back the potassium chlorate. In case of physical and chemical processes which are irreversible in nature, the changes are found to be uni direction and the processes is completed. |
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| 95599. |
“The rate per quantity of enzyme or cells involved in the reaction”, this is applicable to which type of reaction rate?(a) Total rate(b) Specific rate(c) Variable rate(d) Volumetric rate |
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Answer» Right answer is (b) Specific rate Easiest explanation: In specific rate, biological reactions involve enzyme and cell catalysts. Because the total rate of conversion depends on the amount of catalyst present, it is sometimes useful to specify reaction rate as the rate per quantity of enzyme or cells involved in the reaction. |
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| 95600. |
Which of the following reasons is the incorrect reason for frictional losses in the conduit?(a) Gradual change in flow direction(b) Sudden contraction of the flow cross-sections(c) Sudden enlargement of the flow cross-sections(d) Due to irrotational flow of molten metal |
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Answer» Right answer is (d) Due to irrotational flow of molten metal Best explanation: In real fluids, the frictional losses are always present, especially when there is a sudden contraction or enlargement of the flow cross-sections and also due to a gradual change in the flow direction, e.g., in a 90° bend and similar other fittings. |
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