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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. |
Which expansion device is used in a domestic refrigerator? (a) Automatic expansion valve (b) Float valve (c) Thermostatic expansion valve (d) Capillary tube |
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Answer» (d) Capillary tube Capillary tube expansion device is used in a domestic refrigerator. |
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| 2. |
Find out the correct statement(a) Pabsolute = Pgauge – Patmospheric(b) Pvacuum = Patmospheric + Pabsolute(c) Both and b are incorrect(d) Both and b are correct |
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Answer» Correct choice is (c) Both and b are incorrect To explain: Pabsolute = Pgauge + Patmospheric and Pvacuum = Patmospheric – Pabsolute. |
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| 3. |
Steel is an alloy of which two elements?(a) Iron and Brass(b) Brass and aluminium(c) Iron and carbon(d) Carbon and aluminium |
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Answer» Correct choice is (c) Iron and carbon The explanation is: Steel is an alloy of carbon and iron. Carbon is present in the alloy up to 2% by weight and it takes up interstitial sites of the microstructure of iron. There are three types of alloys classified in this, high alloy steel, low alloy steel and medium alloy steel. |
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| 4. |
Which of the following is a property of aluminium?(a) Hard material(b) Brittle(c) Noise control(d) Magnetic |
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Answer» The correct choice is (c) Noise control For explanation: Aluminium is an excellent reflector of electromagnetic and sound waves. Therefore, it is less affected by external noise compared to other building materials. |
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| 5. |
__________ is the temperature at which a liquid just start to vaporize.(a) Critical point(b) Bubble point(c) Triple point(d) Saturation point |
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Answer» Correct choice is (b) Bubble point The explanation: Bubble point is the temperature at which a liquid just start to vaporize. |
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| 6. |
________ is used to fix switches or other appliances at right angles on wood. (a) Hammer (b) Chisel (c) Tri square (d) Plane |
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Answer» Correct answer is (c) Tri square |
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| 7. |
M-Sand has ___________ type of particle shape.(a) Flaky(b) Round(c) Angular(d) Cubical |
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Answer» Correct option is (d) Cubical To explain I would say: The stone is crushed to obtain M-Sand. The shape of the crushed stone is cubical and it has rounded edges. |
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| 8. |
For large spans ______ are used.1. guided bridges2. girder brides3. roller bridges4. trussed bridges |
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Answer» Correct Answer - Option 4 : trussed bridges Concept: The various economical span ranges which are, generally, adopted for a different types of bridges are specified below in the tabulated form:
It is clear from above that for a large spans; truss and suspension bridges are preferred. The suspension bridge is not given in option. |
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| 9. |
Stones are obtained from rocks that are made up of:(a) Ores(b) Minerals(c) Chemical compounds(d) Crystals |
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Answer» Correct option is (b) Minerals To elaborate: Rocks are made up of minerals. They can be monomineralic (single mineral) or polymineralic (more than one mineral). |
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| 10. |
In flooring how many masons, beldars, mazdoors and bhishti per day are required?(a) 4 Beldars, 10 Mazdoors, 10 Masons and 8 Bhishti(b) 4 Beldars, 3 Mazdoors, 5 Masons and 1 Bhishti(c) 9 Beldars, 13 Mazdoors, 5 Masons and 1 Bhishti(d) 3 Mazdoors, 5 Masons and 10 Bhishti |
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Answer» Right option is (b) 4 Beldars, 3 Mazdoors, 5 Masons and 1 Bhishti Explanation: 4 cm thick cement concrete flooring of 40 sq m require-4 Beldars, 3 Mazdoors, 5 Masons and 1 Bhishti per day for mixing, laying and finishing. |
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| 11. |
Scriber is a hand tool used to mark lines on the ____(a) Wood surface.(b) Metal surface.(c) Brick(d) Rubber surface. |
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Answer» Correct answer is (b) Metal surface. |
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| 12. |
Floor in a building(a) Separates levels(b) Is laid below plinth(c) Contains R.C.C.(d) Has thickness of 10cm |
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Answer» Correct answer is (a) Separates levels The explanation is: Floor is laid above plinth level. It is used to tread on, keep furniture, household, other items. It also demarcates levels of a building. P.C.C. is done on flooring and it is usually 4cm thick. |
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| 13. |
Which one of the following is not a classification of stones?(a) Physical Classification(b) Mineralogical Classification(c) Chemical Classification(d) Practical Classification |
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Answer» Correct answer is (b) Mineralogical Classification For explanation: The classifications of stones are physical (based on structure), chemical (based on chemical composition), practical (based on usage) and geological (based on the mode of origin). Mineralogical classification is not a means of classifying stones in general. It’s called chemical classification. |
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| 14. |
Filler Rod provides the additional metal needed to form a joint via _________ (a) Drilling (b) Plumbing (c) Welding (d) Threading |
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Answer» Correct answer is (c) Welding |
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| 15. |
The guidelines for preparation for mortar is given in:(a) IS 4455(b) IS 2250-1981(c) IS 3350-1981(d) IS 5567 |
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Answer» Right option is (b) IS 2250-1981 Easy explanation: The method of hand mixing and machine mixing can be employed. First cement is laid on a flat platform. The required amount of sand is spread on top of it. Finally, water is added slowly till required consistency is reached. |
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| 16. |
Always use a hand screen and safety goggles during ___(a) Constructing (b) Welding (c) Plumbing (d) Tapping |
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Answer» Correct answer is (b) Welding |
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| 17. |
The hot molten material occurring naturally below the surface of the Earth is called:(a) Lava(b) Slag(c) Magma(d) Tuff |
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Answer» Right answer is (c) Magma For explanation: Hot molten material is called Lava when it erupts from a volcano and reaches the surface. Slag is waste material from the smelting of ore. Tuff is a porous rock formed by a consolidation of volcanic ash. |
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| 18. |
Sands should pass through:(a) BIS 480 sieve(b) BIS 8 sieve(c) BIS 5 sieve(d) BIS 6 sieve |
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Answer» Right answer is (a) BIS 480 sieve For explanation: The particle size of sand is between 4.75mm and 75 microns. BIS 480 sieve represents 4.75mm sieve opening. |
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| 19. |
Light weight mortar is prepared by using:(a) Lime(b) Surkhi(c) Wood chips(d) Flyash |
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Answer» The correct answer is (c) Wood chips For explanation I would say: Wood chips, powder or sawdust is added to lime or cement and mixed with water. This results in lightweight mortar. It is used in heat and sound proof construction. |
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| 20. |
D.P.C (Damp Proof Course) is mainly laid on:(a) Footing(b) Floor(c) Foundation(d) Plinth |
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Answer» Right choice is (d) Plinth The explanation: Plinth is a line between sub and superstructure. If D.P.C. is laid on top of plinth level, moisture penetration to the superstructure can be avoided. |
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| 21. |
At what depth and rate is a hypabyssal rock formed?(a) Slow cooling of magma at considerable depth(b) Quick cooling of magma at a shallow depth(c) Rapid cooling of magma at Earth’s surface(d) Rapid cooling of magma at a shallow depth |
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Answer» Right choice is (b) Quick cooling of magma at a shallow depth Easy explanation: Plutonic rocks are formed by slow cooling of magma at considerable depth. Volcanic rocks are formed near the surface of Earth by rapid cooling of magma. Hypabyssal rocks are formed at a quick rate of cooling of magma at considerably shallow depths. |
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| 22. |
________ tool is used in carpentry to level the wooden surface? (a) Chisel (b) Gimlet (c) Saw (d) Jack plane |
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Answer» Correct answer is (d) Jack plane |
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| 23. |
What should be placed at the beginning of every header course in English bond to avoid vertical joint?(a) Queen closer(b) Half bat(c) Three fourth bat(d) King closer |
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Answer» Right choice is (a) Queen closer Best explanation: A queen closer is a brick piece cut in half along the length. It is placed so as to avoid vertical joints. It makes the header come centrally above the underlying stretcher. |
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| 24. |
How many types of foundations are there based on depth?(a) 3(b) 4(c) 5(d) 2 |
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Answer» Correct choice is (d) 2 Easy explanation: The 2 types are shallow and deep foundations. Shallow foundation transfers the load to very near earth. Deep foundations are used for high rise buildings to bear heavy loads. |
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| 25. |
Which IS code gives a code of practice for brick work?(a) IS 2212(b) IS 3102(c) IS 3466(d) IS 1077 |
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Answer» The correct option is (a) IS 2212 The best I can explain: IS 3102 gives the classification of burnt clay solid bricks. IS 3466 gives the specification for masonry cement. IS 1077 gives the guidelines regarding common burnt clay building bricks. |
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| 26. |
What is the value of b?(a) 1(b) 2(c) 3(d) 4 |
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Answer» Right option is (b) 2 Best explanation: Carbon and Oxygen on both the sides. |
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| 27. |
How many types of parapets are there?(a) 4(b) 2(c) 5(d) 6 |
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Answer» The correct answer is (a) 4 To explain: The 4 types are plain, perforated, panelled and embattled. Plain parapet is solid masonry, perforated has holes in different shapes, panel consists of panels joined together and in embattled, they are pierced. |
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| 28. |
Horizontal structural members placed at right angles to bridging joists are:(a) Binders(b) Girders(c) Screed(d) Topping |
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Answer» Correct option is (a) Binders Best explanation: Binders are provided to take the load of bridging joist and of floor toppings. Girders are placed to support binders. Screed is narrow strips of wood or bands of plaster laid on floor to act as guides to get an even surface for toppings. Top most lair of a floor is called toppings. |
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| 29. |
Excess vibration during compacting can lead to:(a) Bleeding(b) Segregation(c) High strength(d) Air bubbles |
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Answer» The correct option is (b) Segregation Easy explanation: Over vibration may lead to a problem called segregation. The coarse aggregate is separated from the cement matrix. This leads to low strength. |
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| 30. |
Mixture of sand & cement is known as ______ (a) Mortar (b) Bricks (c) Plaster of Paris (d) China clay |
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Answer» Correct answer is (a) Mortar |
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| 31. |
1.5 nm. is equal to(a) 1.5*10^-8 dm(b) 0.15 Angstrom(c) 5.9*10^-10 in(d) All of the mentioned |
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Answer» Correct option is (d) All of the mentioned Best explanation: 1 in. = 2.54 cm, 1 Angstrom = 10*^-10 meter, 1 meter = 0.1 dm. |
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| 32. |
Why is natural cement used very limitedly?(a) Brown in Colour(b) Standard consistency is not met with(c) Sets too quickly(d) Particle size is too fine |
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Answer» Correct choice is (c) Sets too quickly The explanation: Natural cement sets very quickly after the addition of water and hence it is not quite workable. Artificial cement is preferred over this. |
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| 33. |
What is resilience?(a) Strength(b) Elasticity(c) Soundness(d) Durability |
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Answer» Correct answer is (b) Elasticity For explanation: When rubber is subjected to a load, it deforms. On removal of the load, it returns back to its original shape and size. This property is resilience. |
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| 34. |
A building can be mainly divided into how many components?(a) 2(b) 3(c) 6(d) 8 |
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Answer» Correct answer is (b) 3 To explain: The 3 components are substructure, plinth and superstructure. Anything below ground level is substructure and above it is superstructure. |
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| 35. |
Which of the following is not an advantage of rapid hardening cement?(a) Faster construction(b) Short curing period(c) Light in weight(d) Higher final setting time |
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Answer» Correct answer is (d) Higher final setting time Easiest explanation: The initial and final setting time of rapid hardening cement is the same as that of ordinary cement. It attains higher strength in less time. It develops the same strength of ordinary cement in four days rather than 28 days. |
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| 36. |
What is the value of b?(a) 1(b) 3(c) 6(d) 9 |
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Answer» Right answer is (c) 6 For explanation I would say: Element Balance. |
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| 37. |
Which of the below material of window has life span of 50 years?(a) PVC(b) Steel(c) UPVC(d) Aluminium |
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Answer» Correct answer is (c) UPVC Easiest explanation: UPVC has very good thermal resistance and durability. The maintenance required is very low. It has an average cost and can thus stay for 50 years. |
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| 38. |
What is the level below window called?(a) Pane level(b) Lintel level(c) Sill level(d) Plinth level |
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Answer» The correct option is (c) Sill level Easy explanation: The wall below window needs to support the weight of the window or opening and keep it steady. This level is called as sill level. |
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| 39. |
Acceleration of gravity in AE system is equal to(a) 0.32174 ft/s2(b) 3.2174 ft/s2(c) 32.174 ft/s2(d) 321.74 ft/s2 |
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Answer» Correct choice is (c) 32.174 ft/s2 The best I can explain: Acceleration of gravity in AE system is equal to 32.174 ft/s2. |
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| 40. |
PVC plug is used to:(a) Connect pipes of varying diameter(b) Connect 2 pipe lines(c) Seal pipes of less diameter(d) Seal end of pipe line |
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Answer» The correct option is (d) Seal end of pipe line The explanation: PVC plug and cap are used to seal the end of a pipeline. They have a threaded end and the other end is closed. |
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| 41. |
What is the Limiting Oxygen Index (LOI) of PVC?(a) 45 or more(b) 20 or more(c) 45 or less(d) 20 or less |
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Answer» Correct answer is (a) 45 or more Best explanation: Limiting Oxygen Index is a minimum concentration of oxygen that will support combustion of a polymer. It is expressed as a percentage. PVC has good flame retardancy. Air has 20% oxygen, PVC has LOI of 45% or more. |
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| 42. |
5 moles of O2 is added to 5 moles of H2, how many moles of H2O will it produce?(a) 5(b) 10(c) 15(d) 20 |
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Answer» The correct answer is (b) 10 Best explanation: Per mole of Oxygen & Hydrogen there is two moles of water. |
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| 43. |
Deficiency of lime in cement leads to:(a) Unsound cement(b) Disintegration of cement(c) Quick setting of cement(d) Expansion of cement |
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Answer» Right option is (c) Quick setting of cement The best I can explain: Presence of lime in sufficient quantity is necessary to form silicates and aluminates of calcium. Excess lime leads to expansion, disintegration and unsoundness of cement. |
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| 44. |
What is the average particle size of cement?(a) 15 microns(b) 45 microns(c) 75 microns(d) 100 microns |
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Answer» Right choice is (a) 15 microns Best explanation: Approximately 95% of cement particles are smaller than 45 microns and the average particle size is 15 microns. |
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| 45. |
Natural rubber contains polymers of an organic compound:(a) Polyprene(b) Neoprene(c) Thiokol(d) Isoprene |
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Answer» The correct choice is (d) Isoprene Easiest explanation: Rubber primarily consists of Isoprene. It may contain certain impurities like organic compounds and water. |
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| 46. |
What is the mole percent of H2 in the feed?(a) 59.2(b) 49.2(c) 39.2(d) 29.9 |
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Answer» Right option is (b) 49.2 Easiest explanation: Element material balance for each element. |
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| 47. |
Polymer Cement Mortar (PCM) is used primarily for:(a) Repairing concrete structure(b) Stone masonry(c) Tile masonry(d) Brick masonry |
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Answer» Correct answer is (a) Repairing concrete structure For explanation: In PCM, a part of cement is replaced by polymer admixtures like latex, emulsion, monomers, etc. These mortars have low permeability, reduces shrinkage and is suited for repairing works. |
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| 48. |
Use of coarser cement particles leads to:(a) Low durability(b) Higher strength(c) Low consistency(d) Higher soundness |
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Answer» Correct choice is (a) Low durability The best I can explain: For coarser particles, hydration starts on the surface of particles, hence, it might not be completely hydrated. This causes low strength and low durability. |
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| 49. |
What is the number of moles of H2 after the reaction?(a) 10(b) 15(c) 20(d) None of the mentioned |
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Answer» Correct answer is (a) 10 For explanation: Moles of H2 = Initial moles of H2 – 3(Extent of the reaction). |
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| 50. |
What does the below PVC pipe fitting represent?(a) Reducer(b) Coupler(c) End cap(d) Saddle |
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Answer» Right answer is (b) Coupler To elaborate: Coupler has threaded or plain ends. It is a small piece used to connect 2 PVC pipes in a pipe line. |
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