Test 16 - General Specifications for Floor Finishes

Question 1 ప్రశ్న 1

A cement-concrete floor topping is to be laid over an existing RCC slab. The slab surface contains laitance, loose mortar droppings and traces of oil. Which preparation is most appropriate before laying a bonded topping?

A Apply the topping directly because the weight of fresh concrete will ensure adequate adhesion. B Remove laitance, loose particles and contamination, provide a suitable surface key, and prepare the base to receive the specified bonding treatment. C Spread dry sand over the contaminated surface without cleaning it. D Increase the topping thickness arbitrarily to compensate for the weak interface.

Question 2 ప్రశ్న 2

A cement-concrete floor finish is specified over a hardened concrete base. The contractor proposes leaving the base smooth and completely dry before spreading the topping. Which procedure is more appropriate?

A Leave the base dry and polished because a smooth interface always improves bonding. B Apply loose aggregate between the base and topping to create a separating layer. C Place the topping without preparation and use vibration to force adhesion to the base. D Prepare a clean, suitably roughened and dampened base without standing water, and apply the approved bonding treatment before placing the topping.

Question 3 ప్రశ్న 3

A washroom floor is required to have a uniform downward slope of 1 in 80 towards a floor drain. The horizontal distance from the farthest point to the drain is 4.00 m. What is the required difference in finished floor level between these points?

A 20 mm. B 40 mm. C 50 mm. D 80 mm.

Question 4 ప్రశ్న 4

During construction of a cement-concrete floor, workers are unable to maintain the required finished level and thickness consistently across a large room. Which site practice most directly addresses this problem?

A Establish properly aligned level marks, screeds and reference guides to control the finished floor plane and specified thickness. B Increase the water content so that the fresh concrete automatically finds the required level. C Check the finished level only after the concrete has fully hardened. D Use different floor thicknesses at random locations without checking the approved drawings.

Question 5 ప్రశ్న 5

During laying of an in-situ cement-concrete floor topping, the mixture contains excessive water and shows segregation during compaction. Which corrective action best follows proper flooring workmanship?

A Spread additional dry cement over the segregated surface to absorb the excess water. B Continue using the mixture because segregation disappears automatically after hardening. C Correct the concrete consistency and production procedure, and place and compact a suitable mix without excessive bleeding or segregation. D Increase the thickness of the topping without changing the concrete mixture.

Question 6 ప్రశ్న 6

For an in-situ cement-concrete floor topping laid separately over a hardened base, which panel arrangement is most consistent with IS 2571?

A Construct the entire floor without considering panel joints or the movement behaviour of the base. B Divide the topping into suitably proportioned panels, normally limiting a separate topping panel dimension to 2 m and coordinating its joints with the base. C Provide panels of unrestricted dimensions whenever a rich cement mix is used. D Terminate panel joints at arbitrary locations without reference to the underlying concrete.

Question 7 ప్రశ్న 7

While finishing a freshly laid cement-concrete floor, workers propose sprinkling dry cement powder over visible bleed water and immediately carrying out intensive trowelling. Which action is appropriate?

A Accept the procedure because dry cement always improves the abrasion resistance of concrete floors. B Add further water before trowelling to obtain a smoother surface. C Begin final trowelling immediately regardless of the condition of the concrete. D Remove or allow excess bleed water to dissipate appropriately, avoid dry-cement dusting, and finish the surface at the proper stage of setting.

Question 8 ప్రశ్న 8

Under the curing provisions of IS 2571 for in-situ cement-concrete flooring, what minimum period of continuous moist curing is specified after the finished surface has hardened sufficiently to avoid damage?

A At least 15 days. B Exactly 3 days. C At least 5 days. D Exactly 7 days, irrespective of the flooring specification.

Question 9 ప్రశ్న 9

A pump-house wash area is frequently exposed to water, and the approved floor specification requires a slip-resistant finish. The contractor proposes substituting smooth polished tiles solely because they are easier to clean. What is the appropriate decision?

A Accept the substitution automatically because polished surfaces are always safer in wet conditions. B Eliminate the specified floor slope to compensate for the polished tiles. C Require a flooring product and surface finish satisfying the specified slip-resistance, durability and service requirements before approving any substitution. D Approve any tile having the same colour as the specified product, regardless of its surface properties.

Question 10 ప్రశ్న 10

Under the cement-mortar bedding guidance of IS 1443 for cement-concrete flooring tiles, which thickness range is normally specified for the bedding layer?

A 1–3 mm. B 10–30 mm. C 40–60 mm. D 75–100 mm.

Question 11 ప్రశ్న 11

A rectangular room is to receive square ceramic tiles in a symmetrical pattern. The contractor proposes beginning from an arbitrary corner without considering the resulting narrow cut pieces along the opposite walls. Which procedure is more appropriate?

A Ignore the approved layout because tile cutting is unrelated to flooring quality. B Lay every tile without joints so that no dimensional adjustment is required. C Use irregular joint widths to absorb all differences between the room dimensions and tile sizes. D Set out the approved tile pattern and reference lines before laying, coordinating joint widths and edge cuts to obtain a balanced and properly aligned finish.

Question 12 ప్రశ్న 12

A flooring specification requires cement mortar bedding in a dry volumetric ratio of 1:4. For a simplified batching calculation, the combined dry ingredient volume is exactly 0.60 m3, with no bulking or volume-change allowance. What are the cement and sand volumes respectively?

A 0.12 m3 cement and 0.48 m3 sand. B 0.15 m3 cement and 0.45 m3 sand. C 0.20 m3 cement and 0.40 m3 sand. D 0.48 m3 cement and 0.12 m3 sand.

Question 13 ప్రశ్న 13

An approved tile-floor detail requires a 20 mm thick mortar bed and tiles having a specified thickness of 10 mm. Assuming no additional adhesive, levelling coat or other layer, what is the total nominal buildup above the prepared base?

A 10 mm. B 30 mm. C 20 mm. D 200 mm.

Question 14 ప్రశ్న 14

A tile manufacturer specifies a compatible thin-bed adhesive applied over a suitably prepared and levelled substrate. The contractor proposes using isolated thick adhesive spots beneath the tiles instead of the approved application method. Which response is correct?

A Accept spot fixing automatically because the empty spaces improve tile strength. B Use any adhesive thickness regardless of the manufacturer's instructions. C Apply the approved adhesive using the specified preparation, spreading and bedding method to achieve the required contact and support. D Replace the adhesive with dry sand because all tile-fixing materials perform identically.

Question 15 ప్రశ్న 15

For cement-concrete flooring tiles laid in accordance with the normal jointing provision of IS 1443, what joint width is generally specified between adjacent tiles?

A 1.5 mm. B 10 mm. C 15 mm. D 25 mm.

Question 16 ప్రశ్న 16

A tiled floor crosses an existing structural movement joint in the supporting concrete. The contractor proposes fixing tiles continuously across the joint and filling the surface line with rigid cement grout. Which treatment is appropriate?

A Conceal the underlying movement joint because the tile finish prevents structural movement. B Provide only a decorative line above the joint without allowing any movement. C Fill the structural joint with ordinary concrete before laying the tiles, without approval. D Continue the movement-joint provision through the flooring system and use the specified movement-compatible joint treatment.

Question 17 ప్రశ్న 17

Natural stone slabs are to be laid over a mortar bed in the entrance hall of a public building. Several slabs have uneven bearing surfaces, and the contractor proposes resting them on isolated mortar lumps while leaving voids below. What should the engineer require?

A Accept the arrangement because stone slabs require support only at their corners. B Prepare and lay the slabs on the specified bedding with adequate continuous support, correct alignment and properly formed joints. C Leave voids intentionally to reduce the dead load of the floor finish. D Fill the unsupported spaces with loose dry sand after the stone slabs are fixed.

Question 18 ప్రశ్న 18

During inspection of a newly laid stone-tile floor, several units rock under foot pressure, show substantial edge misalignment and produce hollow sounds. Which action is most appropriate?

A Accept the entire floor because hollow sounds always indicate satisfactory bedding. B Polish the tile surfaces without investigating the bedding defects. C Investigate the affected locations and relay or otherwise rectify defective units using the approved bedding and jointing procedure. D Increase the grout colour intensity so that the defects become less visible.

Question 19 ప్రశ్న 19

An in-situ terrazzo floor is specified to receive mechanical grinding and polishing. The contractor proposes beginning aggressive grinding immediately after laying while the cementitious topping is still weak. What is the correct specification-based procedure?

A Begin full grinding immediately because terrazzo obtains its strength from polishing alone. B Add dry cement powder during grinding to replace the need for curing. C Omit all intermediate grinding operations because the final polish removes every defect. D Allow the topping to harden and cure adequately, then carry out the prescribed grinding, grouting and polishing sequence.

Question 20 ప్రశ్న 20

Under IS 1200 (Part 11):2024, which measurement rule applies to in-situ cementitious skirting of height 150 mm and in-situ skirting exceeding 150 mm in height, respectively?

A Running metres for skirting up to 150 mm, and square metres for skirting exceeding 150 mm. B Square metres for both categories without distinction. C Cubic metres for the first category and running metres for the second. D Number of individual panels for both categories.

Question 21 ప్రశ్న 21

Under IS 1200 (Part 11):2024, how is skirting formed using tile or slab units generally measured under the tile, slab or block finishes provisions?

A By the number of tile boxes purchased, regardless of the installed quantity. B In running metres, stating the height and the relevant material and workmanship particulars. C Only in cubic metres, irrespective of the tile thickness. D As an unspecified percentage of the main floor area.

Question 22 ప్రశ్న 22

A rectangular room has floor dimensions of 12.00 m by 8.00 m. The tiled floor contains two unfilled rectangular voids, measuring 0.40 m by 0.50 m and 0.60 m by 0.50 m. Applying the no-deduction rule for voids not exceeding 0.20 m2 under IS 1200 (Part 11):2024, what is the measured tile-floor finish area, assuming no other adjustments?

A 95.50 m2. B 95.80 m2. C 96.00 m2. D 95.70 m2.

Question 23 ప్రశ్న 23

A rectangular room measuring 7.20 m by 5.40 m is to be covered with square floor tiles on a nominal 0.60 m by 0.60 m module. Ignore joint-width effects and assume the dimensions allow an exact whole-tile layout. If 5 percent additional tiles are required for wastage and spares, rounding the purchase quantity upward to the next whole tile, how many tiles should be ordered?

A 108 tiles. B 110 tiles. C 112 tiles. D 114 tiles.

Question 24 ప్రశ్న 24

A floor area of 80 m2 is to receive a uniform 20 mm thick cement-mortar bedding layer in dry volumetric proportion 1:4. For this simplified estimate, assume the combined dry ingredient volume is 1.25 times the theoretical finished bedding volume, with no additional wastage or bulking correction. What volumes of cement and sand are required respectively?

A 0.40 m3 cement and 1.60 m3 sand. B 0.32 m3 cement and 1.28 m3 sand. C 0.50 m3 cement and 1.50 m3 sand. D 0.20 m3 cement and 1.80 m3 sand.

Question 25 ప్రశ్న 25

A detailed estimate includes in-situ cement-concrete flooring, ceramic tile flooring on mortar bedding, natural stone flooring and separately specified skirting. The contractor proposes combining all quantities into one item at a single unspecified rate. Which estimation practice is most appropriate?

A Combine the different finishes automatically because all are placed above a structural floor. B Describe and measure the different floor-finishing items according to their materials, thicknesses, bedding, workmanship and applicable measurement rules, while checking contractual rate inclusions to avoid duplicate charges. C Measure only the total weight of tiles and stone slabs and ignore the finished areas. D Apply the highest unit rate to the entire floor area without considering the approved specifications.

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