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This section includes 7 InterviewSolutions, each offering curated multiple-choice questions to sharpen your Current Affairs knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
If for hydrogen `C_(P) - C_(V) = m` and for nitrogen `C_(P) - C_(V) = n`, where `C_(P)` and `C_(V)` refer to specific heats per unit mass respectively at constant pressure and constant volume, the relation between `m` and `n` is (molecular weight of hydrogen = 2 and molecular weight or nitrogen = 14)A. n = 14mB. n = 7mC. m = 7nD. m = 14m |
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Answer» Correct Answer - A At t = 0 particle is at origin (x = 0) potential energy at origin (x = 0) = 15 J `therefore` total mechanical energy `=K.E+P.E=(1)/(2)xx2(4sqrt(6))^(2)+15=96+15=111J` `because U=-x^(3)+6x^(2)+15` `(du)/(dx)=-3x^(2)+12x` `0=-3x(x-4)` `x=0" and "x=4, " since "F=-(du)/(dx)` therefore force on particle is zero at x = 4 Potential energy at (x = 4) = 47 J By conservation of mechanical energy `M.E=K.E+P.E.implies111=47+K.EimpliesV=8ms^(-1)` |
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| 2. |
A voltage across a series resistor circuit is proportional to?(a) The amount of time the circuit was on for(b) The value of the resistance itself(c) The value of the other resistances in the circuit(d) The power in the circuit |
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Answer» Right option is (b) The value of the resistance itself The best explanation: V=IR hence the voltage across a series resistor circuit is proportional to the value of the resistance. |
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| 3. |
Which of the following compound forms the bond between sand particles in carbon dioxide moulding process.(a) Sodium(b) Amorphous silica(c) Dehydrated water(d) Carbon Monoxide |
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Answer» Correct choice is (b) Amorphous silica Explanation: Amorphous silica forms the bond between sand particles. It is produced by reaction or treatment of the mixture of sand and sodium silicates by carbon dioxide. |
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| 4. |
A bus is moving on a horizontal road with speed `5m//s`. A & B are two persons in bus, A is standing in bus and B is running towards A inside the bus with speed `2m//s` (w.r.t bus). Find the speed of B relative to C in (m/s) |
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Answer» Correct Answer - 6 `P=(4)/(10)xx1200=480" watt "implies f_(r )xxv=480` `f_(r )=(480)/(8)=60N` `f_(r )impliesmuNimplies 60=mu(100)," So "mu=0.6` |
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| 5. |
A pendulum of mass m and length l [ as in figure] is attached to the top of a pole of height also l. Initial conditions have been set up so that the mass swings around in a horizontal circle, with the string always making an anlge of `60^(@)` with the vertical, as shown. A frictionless hemispherical shell of radius l is now fixed in placed over the setup [as in figure (2)]. with the top of the shell attached to the top of the pole. If the speed of the mass is now arranged to be twice what it was in previous case then the normal force from the hemisphere on the mass is nmg, then n is |
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Answer» At t = 2 sec block stops. As impulse of friction + impulse of F = initial mom, impulse of friction is negative. |
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| 6. |
The preferred shape of a runner in a sand casting is ___________(a) Cylindrical(b) Spherical(c) Rectangular(d) Trapezoidal |
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Answer» Right choice is (d) Trapezoidal For explanation I would say: Trapezoidal runner is most preferable in sound sand casting as it provides good flow with less distortion or splattering of molten metal. |
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| 7. |
Core boxes are made out of which pattern?(a) Plaster pattern(b) Wax pattern(c) Metal patterns(d) Polystyrene patterns |
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Answer» Right answer is (a) Plaster pattern Explanation: A pattern is basically a duplicate of the object that has to be casted. It is one of the applications of plaster pattern to make core boxes and other small and intricate patterns. |
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| 8. |
Which of the following ranges show the approx range of finishing depth (in mm) required for finished casting?(a) 2 to 20(b) 20 to 30(c) 30 to 35(d) 35 to 40 |
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Answer» The correct choice is (a) 2 to 20 The best explanation: The range of finishing depth basically depends on dimensions, the type of casting material and the surface finish required, but for the approximation, it comes in the range of 2 to 20 mm. In this range, casting can achieve greater surface smoothness and shiny surface with good appearance. |
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| 9. |
What is the ratio of tank diameter to impeller diameter for Newtonian fluids?(a) 3:1(b) 2:1(c) 1:3(d) 1:2 |
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Answer» The correct option is (a) 3:1 Best explanation: Mixing is achieved using an impeller mounted in the tank; for use with Newtonian fluids, the ratio of tank diameter to impeller diameter is normally about 3:1. The impeller is usually positioned overhead on a centrally-located stirrer shaft. For efficient mixing with a single impeller, the depth of liquid in the tank should be no more than 1.0-1.25 times the tank diameter. |
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| 10. |
Which of the following is the slowest step in mixing process?(a) Distribution(b) Diffusion(c) Dispersion(d) Decomposition |
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Answer» Right choice is (a) Distribution The explanation is: Distribution is an important process in mixing, but can be relatively slow. In large tanks, the size of the circulation paths is also large and the time taken to traverse them is long; this, together with the regularity of fluid pumping at the impeller, inhibits rapid mixing. Accordingly, distribution is often the slowest step in the mixing process. |
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| 11. |
Which of the following patterns has high compressive strength?(a) Plastic pattern(b) Wax pattern(c) Polystyrene pattern(d) Plaster pattern |
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Answer» The correct choice is (d) Plaster pattern Explanation: Among plastic patterns, wax patterns and polystyrene pattern, it is plaster pattern which has the highest compressive strength. The calculated compressive strength is as high as up to 285kg/cm^2. |
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| 12. |
Calculate the size of cylindrical riser (height and dia equal) to feed a steel slab casting 25x25x5 cm.(a) 10cm(b) 12.5cm(c) 14cm(d) Data insufficient |
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Answer» Correct answer is (b) 12.5cm The best I can explain: a = 25cm b = 5cm c = 25cm Modulus Mc = (a×b)/2(a+b) = Mc = (25×5)/2(25+5) = 125/60 = 2.0833cm The riser diameter D = 6 x Mc = 6×2.0833 = 12.5cm. |
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| 13. |
To ease the storing and assembly which of the following method is used by industries?(a) Colour pattern(b) Scanned copy/Photo(c) Coding and numbered(d) No measurements are taken |
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Answer» The correct option is (c) Coding and numbered For explanation: Coding with numbers are the easier ways to distinguish the assemblies of patterns and ease its storing. |
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| 14. |
If a web of internal passageways and chambers is to be constructed which of the following element is most obsolete for use?(a) Cores(b) Core prints(c) Core boxes(d) Chaplets |
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Answer» The correct option is (a) Cores The explanation: Core has a variety of uses. For the making of long passageways in a casting core a best suitable and cheap. |
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| 15. |
Which of the following method can be used for both solid patterns and split patterns?(a) Open sand method molding(b) Bedded-in method molding(c) Turn-over method molding(d) Dry sand molding |
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Answer» The correct answer is (c) Turn-over method molding Best explanation: For both the patterns to be produced, that is solid and split patterns, turn-over method of molding can be used. |
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| 16. |
Why is it important to take careful measurements/steps while storing the pattern?(a) They loose their shape and size(b) They get rusted(c) They get warped(d) All of the mentioned |
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Answer» Right choice is (d) All of the mentioned The explanation is: On long storage, if careful measurements are not taken then pattern materials tends to alter their dimension and the physical condition gets worse. |
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| 17. |
Which of the following is not a drilling or boring tool?(a) Brace(b) Counter sink bit(c) Auger bit(d) Hand vice |
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Answer» The correct choice is (d) Hand vice For explanation I would say: Hand vice is one of the tools used for clamping processes. While, brace, counter sink bit and ager bit are counted among drilling tools or boring tools. |
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| 18. |
Gimlet is which of the following tool?(a) Clamping tools(b) Drilling tool(c) Sawing tool(d) Wood planing tool |
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Answer» Correct answer is (b) Drilling tool Explanation: Gimlet is one of the drilling and boring tools. Gimlet is used for making patterns but is not counted under clamping, sawing or wood planing tool. |
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| 19. |
Which of the following is not a sawing tool?(a) Coping saw(b) Pinch dog(c) Panel saw(d) Bow saw |
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Answer» Right choice is (b) Pinch dog For explanation I would say: Pinch dog is one of the tools used for clamping processes. While coping saw, panel saw and bow saw are the different types of sawing tools. |
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| 20. |
What is Fick’s law applicable to?(a) Momentum transfer(b) Heat transfer(c) Mass transfer(d) Velocity transfer |
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Answer» The correct answer is (c) Mass transfer The explanation: In single-phase systems, the rate of mass transfer due to molecular diffusion is given by Fick’s law of diffusion, which states that mass flux is proportional to the concentration gradient. |
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| 21. |
Parting line in the sand casting should be ___________(a) Simple and curved(b) Simple and straight(c) Irregular(d) Any type will not make a difference |
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Answer» Right answer is (b) Simple and straight To explain: The parting line needs to be simple and straight to create a difference between upper part and lower part. |
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| 22. |
The filamentous cells will become flexible under which of the following condition?(a) Increased osmotic pressure and low turgor pressure(b) Decreased osmotic pressure and high turgor pressure(c) Increased osmotic pressure and high turgor pressure(d) Decreased osmotic pressure and low turgor pressure |
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Answer» Right choice is (a) Increased osmotic pressure and low turgor pressure Best explanation: Osmotic pressure of the culture medium affects cell turgor pressure. This in turn affects the hyphal flexibility of filamentous cells; increased osmotic pressure gives a lower turgor pressure making the hyphae more flexible. Improved hyphal flexibility reduces broth viscosity, and can also have a marked effect on yield stress. |
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| 23. |
Hot strength is seen at what temperature?(a) Above 212°F(b) Above 312°F(c) Above 412°F(d) Above 512°F |
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Answer» The correct answer is (a) Above 212°F Explanation: Hot strength basically is the strength of the sand which is present inside the mould cavity. It is observed that, the hot strength of any material is at 212°F or above it. |
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| 24. |
Which of the following does not serve the purpose of using patterns in sand casting?(a) Contain core prints if the casting requires a core and need to be made hollow(b) To give the exact shape and size (in addition to the allowances) to the casting as that of the final object(c) Reduces the cost of production while used in mass production(d) Sometimes used to carry the mechanism to melt the metal/material which is to be poured into the cavity |
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Answer» Correct option is (d) Sometimes used to carry the mechanism to melt the metal/material which is to be poured into the cavity For explanation I would say: The pattern never carries or includes the mechanism to melt the metal, which needs to be poured into the cavity. This job needs to be done externally. |
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| 25. |
Which of the following factors affect the choice of a pattern at most times?(a) Size and complexity of the casting(b) Characteristics of castings(c) Type of molding and castings method to be used(d) Type of cooling rates to be provided |
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Answer» The correct answer is (d) Type of cooling rates to be provided To explain: The type of cooling rates depends upon the required strength in the casting, which cannot be controlled by the type of any pattern. Proper chills are to be used for that purpose. |
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| 26. |
The function of a gated pattern is ___________(a) To produce small castings in mass production(b) To create castings of a very heavy mass(c) To create castings containing complex design(d) To create symmetrical castings |
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Answer» Correct answer is (a) To produce small castings in mass production Explanation: Gated pattern manufactures huge no. of products using single time casting using a common gating inlet system. Hence, the casting needs to be small and simple and is only justified for mass production, as the pattern is used for 1-2 times only. |
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| 27. |
Time to time cleaning of stored pattern should be done by ___________(a) Distilled water(b) Dry cleaning(c) Treated with proper chemical fluids(d) Vegetable oils |
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Answer» The correct option is (b) Dry cleaning Easy explanation: No dust or chemical or moisture should be left over the surface of the pattern for longer periods hence time to time dry cleaning is a must. |
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| 28. |
Which of the following is not a part of the pattern at most times?(a) Mould cavity(b) Cope(c) Molten metal(d) Core |
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Answer» Correct answer is (c) Molten metal Easiest explanation: Molten material is poured into the mould cavity to make a casting, after solidification and hence, it does not constitute the pattern. |
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| 29. |
Which of the following is not a defect if permeability is not enough?(a) Brittleness(b) Gas holes(c) Mould blast(d) Surface blows |
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Answer» Right answer is (a) Brittleness The best I can explain: If the permeability or the porosity is less or the permeability is found to be inadequate or the porosity is found to be absent, then brittleness is not the defect it has, but it may have, gas holes or mould blasts or surface blows. |
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| 30. |
In voluntary contraction of the skeletal muscles, the muscle potential ranges from ________(a) 50 uV – 5 mV(b) 50 mV – 5 V(c) 0.05 uV – 2 mV(d) 50 mV – 500 mV |
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Answer» The correct answer is (a) 50 uV – 5 mV To explain I would say: In voluntary contraction of the skeletal muscles, the muscle potential ranges from 50 uV – 5 mV and duration from 2 to 15 ms. The values vary with the anatomic position of the muscle and the size and location of the electrode. In a relaxed muscle there are no action potentials. |
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| 31. |
बयो सवर्ट का नियम |
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Answer» बायो-सेवर्ट नियम (Bio–Savart law) विद्युतचुम्बकत्व के अन्तर्गत एक समीकरण है जो किसी विद्युतधारा द्वारा किसी बिन्दु पर उत्पादित चुम्बकीय क्षेत्र B का मान बताता है। सदिश राशि B धारा के परिमाण, दिशा, लम्बाई, एवं बिन्दू से दूरी पर निर्भर करती है। यह नियम स्थिरचुम्बकीय स्थिति में ही वैध है और इससे प्राप्त B का मान एम्पीयर का नियम तथा गाउस का नियम से प्राप्त चुम्बकीय क्षेत्र से मेल खाते हैं। यह नियम सन १८२० में प्रतिपादित किया गया था। यह नियम कूलाम्ब के नियम से मिलता-जुलता नियम है, जो स्थिरवैद्युतिकी में प्रयुक्त होता है। |
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| 32. |
What kind of receptor coupled with ion channel? |
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Answer» An acetylcholine receptor |
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| 33. |
What kind of receptor coupled with ion channel? ligand gate channel G Protein Intracellular Kinase enzyme |
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Answer» G-protein-linked receptors bind a ligand and activate a membrane protein called a G-protein, which then interacts with either an ion channel or an enzyme in the membrane. Enzyme-linked receptors are cell-surface receptors with intracellular domains that are associated with an enzyme. |
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| 34. |
How many cells are there in our body? ( Give answers excluding and including bacterias both ) |
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Answer» The first one estimates the number of cells in a 100-kilogram male using an average cell volume of between 1,000 and 10,000 cubic micrometers. This gave them a “back of the envelope estimate” in a range of 30 to 40 trillion cells. Next, they calculated the actual cell number of the five most common cell types in an average adult male, which account for 97 percent of the cells in the body. This led them to an estimate of 30 trillion cells, of which red blood cells make up 84 percent. But human cells are not the only cells in our bodies. Although previous studies have estimated that there are 10 times as many bacteria in our bodies than human cells, Prof. Milo and colleagues revised this number to be around 38 trillion. Interestingly, although large in number, bacteria are much smaller than human cells, and they actually make up only 200 grams of total body mass, according to Prof. Milo. But with nearly equal numbers of cells in our bodies, one could argue that we are as much bacteria as we are human, bringing the total number up to around 70 trillion. |
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| 35. |
Which of the following is a G protein coupled receptor: A. Muscarinic cholinergic receptor B. Nicotinic cholinergic receptor C. Glucocorticoid receptor D. Insulin receptor |
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Answer» A. Muscarinic cholinergic receptor |
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| 36. |
The receptor transduction mechanism with the fastest time-course of response effectuation is: A. Adenylyl cyclase-cyclic AMP pathway B. Phospholipase C-IP3: DAG pathway C. Intrinsic ion channel operation D. Protein synthesis modulation |
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Answer» C. Intrinsic ion channel operation |
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| 37. |
Receptor agonists possess: A. Affinity but no intrinsic activity B. Intrinsic activity but no affinity C. Affinity and intrinsic activity with a + sign D. Affinity and intrinsic activity with a – sign |
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Answer» C. Affinity and intrinsic activity with a + sign |
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| 38. |
Which colour is provided on core prints for machined openings?(a) Black strips on yellow background(b) Yellow strips on black background(c) Red strips on yellow background(d) Yellow strips on black background |
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Answer» The correct option is (b) Yellow strips on black background For 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, yellow strips on the black background is to be given for machined openings of core prints. |
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| 39. |
Agonists affect the receptor molecule in the following manner: A. Alter its amino acid sequence B. Denature the receptor protein C. Alter its folding or alignment of subunits D. Induce covalent bond formation |
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Answer» C. Alter its folding or alignment of subunits |
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| 40. |
The following is a competitive type of enzyme inhibitor: A. Acetazolamide B. Disulfiram C. Physostigmine D. Theophylline |
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Answer» C. Physostigmine |
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| 41. |
The following statement is not true of log dose-response curve: A. It is almost linear except at the ends B. It is a rectangular hyperbola C. It facilitates comparison of different agonistsD. It can help in discriminating between competitive and noncompetitive antagonists |
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Answer» B. It is a rectangular hyperbola |
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| 42. |
Down regulation of receptors can occur as a consequence of: A. Continuous use of agonists B. Continuous use of antagonists C. Chronic use of CNS depressants D. Denervation |
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Answer» A. Continuous use of agonists |
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| 43. |
A partial agonist can antagonise the effects of a full agonist because it has: A. High affinity but low intrinsic activity B. Low affinity but high intrinsic activity C. No affinity and low intrinsic activityD. High affinity but no intrinsic activity |
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Answer» A. High affinity but low intrinsic activity |
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| 44. |
Drug metabolism can be induced by the following factors except: A. Cigarette smoking B. Acute alcohol ingestion C. Exposure to insecticides D. Consumption charcoal broiled meat |
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Answer» B. Acute alcohol ingestion |
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| 45. |
A ‘toxic effect’ differs from a ‘side effect’ in that: A. It is not a pharmacological effect of the drug B. It is a more intense pharmacological effect that occurs at high dose or after prolonged medication C. It must involve drug induced cellular injury D. It involves host defence mechanisms |
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Answer» B. It is a more intense pharmacological effect that occurs at high dose or after prolonged medication |
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| 46. |
Sodium silicate reacts with carbon dioxide to give what?(a) Sodium dichromate(b) Sodium sulphide(c) Sodium bicarbonate(d) Sodium carbonate |
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Answer» Right choice is (d) Sodium carbonate The explanation is: When sodium silicate is made to react with carbon dioxide gas, it is known to yield sodium carbonate and silica gel. |
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| 47. |
Use of an emetic to remove the ingested poison is contraindicated in following poisonings except that by: A. Strychnine B. Caustic soda C. Ferrous sulfate D. Kerosene |
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Answer» C. Ferrous sulfate |
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| 48. |
Which diagnostic statement is based on ECG wave shapes that attempt to describe the state of the working muscle masses?(a) Rhythm statements(b) Morphological statements(c) Morphological-Rhythm statements(d) Rhythm-Morphological statements |
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Answer» Correct answer is (b) Morphological statements For explanation I would say: Morphological statement-primarily based on ECG wave shapes that attempt to describe the state of the working muscle masses. The other type of diagnostic statement is Rhythm statement. These both diagnostic statements are observed from the ECG records. |
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| 49. |
What is the mole fraction of O2?(a) 0.2(b) 0.4(c) 0.6(d) 0.8 |
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Answer» The correct answer is (b) 0.4 Explanation: Mole fraction = Moles of the component / Total moles. |
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| 50. |
Which of the following statements is not true of fixed dose combination formulations: A. They are more convenient B. Contraindication to one of the components does not contraindicate the formulation C. The dose of any one component cannot be independently adjusted D. The time course of action of the different components may not be identical |
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Answer» B. Contraindication to one of the components does not contraindicate the formulation |
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