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The correct choice is (B) Dredger

For explanation: In order to PROVIDE the necessary depth of water near the ports, it becomes essential to do the PROCESS of dredging which is specialised FORM of excavation.

Right choice is (a) Manilla

Easiest explanation: While using Manilla rope, things to be CONSIDERED are- ropes should possess the required STRENGTH and RESISTANT to wear and TEAR. The Rope should be stored in dry and well ventilated place. The rope should never be placed coiled on a DAMP surface.

Right choice is (b) HOISTS

To elaborate: The platform MAYBE slide hung or Centre hung. The former is used for lower capacities and the LATTER is used for higher capacities. In ORDER to PROVIDE safety and stability to the Hoists, the vertical guides are anchored with the structure.

The correct choice is (b) Scarifier

For explanation: SCRAPER contents teeth which are known as Tynes. Grader is used for spreading lose material, CONSTRUCTING EARTH roads and for giving shape to the subgrade. It is either self propelled or is towed by TRACTOR.

Correct choice is (d) Bitumen boiler

The EXPLANATION: Bitumen boiler is mounted on wheel and can be transferred from one place to another. WHEREAS, Concrete mixer is used to PREPARE concrete for cement concrete roads.

Correct choice is (a) Hydraulic

The explanation is: The SUCTION pipe is provided at bottom with a cutter for hard MATERIAL. This type of dredger is ALSO known as suction dredger. A Hydraulic Dredger is unsuitable for OPEN see where the HEIGHT of sea waves exceeds 1200 mm.

The correct option is (b) Spreading

Best explanation: In case of RADIAL spreaders, the placing area is decided by the cantilevered support SWINGS the discharge END through an arc, usually 180° to 360°. These Conveyors are also PROVIDED with the arrangement of extending and retracting the placing Conveyor to a substantial distance.

The correct answer is (C) Derrick tower

Easy explanation: A Gantry is used to replace ORDINARY SCAFFOLDING and it lifts and moves material of all TYPES. Derrick tower Gantry is very much suitable for lifting and moving the material in the construction of very TALL structures.

The correct option is (a) WOOD auger bits

To explain I would say: GENERALLY a auger bit should only be used in hand brace. The single spur cuts and DEFINES the edge of the hole while the chisel like cutting edge REMOVE the waste within the previously cut circle. The threaded centre BITES into the wood and pulls the bit into the timber.

Right answer is (c) Centre cut

The BEST I can explain: In general, it is to be OBSERVED that the drilling pattern selected should give the desired breakage of ROCK with minimum over breakage. The term drilling pattern is used to indicate the spacing of the drill holes.

The correct option is (c) TRAILERS

To explain: Trailers can be FULL trailers, semi trailers or trailers. They have hydraulic brakes and their lighting system is OPERATED from main units.

Right CHOICE is (d) Dipper

To elaborate: The dipper STICK connects the bucket and boom. The bucket is dredged by releasing and pulling the hoist CABLE. The dipper dredger is ideal for working in heavy GROUNDS.

Right option is (b) Scraper

The BEST I can EXPLAIN: The CAPACITY of scrapper varies from 3 M cube to 9 M cube. The scrap as a cutting edge or blade and the bottom and it is possible to dig earth to a DEPTH of about 250 MM.

The correct option is (c) Continuous flow

For EXPLANATION: Belt conveyors, pipelines, air COMPRESSORS, etc. are EXAMPLES of continuous flow type equipment. Whereas, motor graders, Bulldozers, scrappers, etc. are examples of MIXED type equipment.

Correct choice is (b) Wire

Explanation: The important POINTS to be remembered in connection with the wire ropes are- the ropes should not form KINKS or twists and should be STRONG and durable; The PROPER inspection and maintenance will be necessary to keep the ropes in working CONDITION, etc.

Right option is (c) Gin poles

For explanation I would say: Each of the guy rope is WELL anchored to a dead man which may be in the FORM of concrete blocks or WOODEN logs buried in the ground. Suitable block is provided at the top of mast to connect hoists TACKLE with the hoists rope.

Correct answer is (b) Pneumatic

Easy explanation: The Rubber tyred or pneumatic rollers are found to be very efficient in the composition of earth UPGRADE, granular soils in base course, final operation for BITUMINOUS surface dressing, etc. In addition to the direct pressure due to ROLLING these rollers ALSO PROVIDE a slight kneading action.

Correct option is (a) Maintenance and repairs

For explanation I would SAY: In any case, the cost ALLOTTED to maintenance and repairs should be at least efficient to KEEP the EQUIPMENT in the work order. However, records of similar equipment may serve as a good guide for determining the average ANNUAL cost of maintenance and repairs.

Right choice is (d) DITCHER

Easy explanation: Ditcher is MAINLY used to excavate Trenches from mains, GAS lines, oil pipelines, telephone cable, drainage lines etc. These machines are GENERALLY crawler mounted. They can be WHEEL type or ladder type also.

Correct option is (a) Cost Depreciation

To elaborate: The METHODS employed to determine the cost depreciation are arbitrary and they have to be arbitrary because it is not possible to CARRY out tests, EITHER theoretically or PRACTICALLY, to work out the rate of consumption of the economic productive usefulness of depreciable equipment.

Correct choice is (d) Steam hammer

To elaborate: Steam hammer consists of a hammer like Piston located within a CYLINDER. The hammer is raised by the pressure of steam injected into the LOWER PART of a cylinder and FALLS down with a force by removing the steam. Steam hammer that FALL by their own weight are called as steam drop hammers.

The correct option is (b) TOWER crane

Easy explanation: The cable has a breaking strength of 2500 KN to 7000 kN and its UNIT Weight is about 150 Newton to 500 Newton per metre LENGTH. The use of cable way is usually made in the TRANSPORT of concrete from one place to the other.

Correct answer is (c) Road roller

The best explanation: VARIOUS TYPES of Road ROLLERS such as PNEUMATIC roller or oil rollers, Sheep’s feet roller, etc. are AVAILABLE to suit the requirements of different types of road.

The correct CHOICE is (d) Spur point BITS

Easy explanation: Spur point bits have a central point and two raised spurs that helps keep the bit drilling straight. The bit cuts Timber very fast when used in a power DRILL and leaves clean sided HOLE. They are ideal for drilling holes for the Dowels as the SIDES of the holes are clean and parallel.

The correct ANSWER is (b) Investment CHARGES

Easiest EXPLANATION: The investment cost to the owner includes interest on money invested, taxes of all times, insurance premium and charges for storage. The rates of these ITEMS will vary from place to place, equipment to equipment and owner to owner.

The correct option is (a) Sinking fund

For explanation I would SAY: The amount of the annual INSTALLMENT of the sinking fund MAY be FOUND out by the sinking fund formula where S represents amount of sinking fund and i represent the rate of interest expressed in decimal for example 3 %.

Correct answer is (b) COMPACTION

Best explanation: Compaction of the earth and it is done by Rolling, kneading, RAMMING, tamping, vibrating, ETC. There are three types of compaction EQUIPMENT that is- rolling equipment, Ramming equipment and vibrating equipment.

Correct choice is (c) HOLE saw bits

Easiest explanation: Hope saw bits usually cut up to a depth of 18 mm. They are best used in a POWER drill at low speed. Their sharpening can be DONE with a fine triangular file. To cut large hole combination holes of bits with the NUMBER of different size ROUND saw blades are used.

Correct ANSWER is (a) Pulley blocks

To elaborate: The blocks are made of WOOD and depending on the number of sheaves or Pulley wheels, they are TERMED as SINGLE or double etc. pulley blocks. The various forms of pulley blocks are available such as differential pulley blocks, spur gear pulley blocks and WORM gear pulley block.

The correct choice is (a) ROTARY percussion drill

To elaborate: The Rotary hammer drill is a percussion drill that uses a weight to CREATE the IMPACT force on the masonry BIT. Some styles of these drills are INTENDED for masonry drilling only.

Right OPTION is (B) Backactor

Best explanation: Back trench hoe excavator can also be used for the EXCAVATION of smaller areas such as BASEMENT, footing and trenches. The hoe is an instrument for scrapping, DIGGING and losing the earth.

The correct option is (c) Dead weight

To elaborate: Dead weight ROLLER are usually DIESEL POWERED and driven by a seated OPERATOR within a cabin. Their weight varying from 1 to 16 tonnes which is distributed to the ground through two large diameter rear wheels and a WIDER but small front Steering wheel.

The correct option is (b) Drilling pattern

For explanation I WOULD say: The drilling pattern to be selected for LOADING of explosives which depend on the type of drill employed, depth of the drill holes, amount of stemming required, type of rock, quantity and quality of explosive, ETC. There are several drilling patterns based on practical experience and suitable modifications are made to meet with the REQUIREMENT of each INDIVIDUAL project.

Right option is (a) Shot drill

Easy explanation: The Shot drill bit is rotated under PRESSURE and the cuttings are removed by WATER which is supplied through the drill ROD. Standard shot drills can drill holes to a DEPTH of about 180 metres or more with diameter varying from 65 mm to 500 mm. It is possible to drill rock of any hardness with the help of these drills.

Correct choice is (a) Blasthole

Best explanation: The Blasthole drill BIT, as it rotates over the ROCK, DISINTEGRATES it and the cuttings are removed by a STREAM of compressed air. The blast of compressed air also COOLS down the bit. The Blasthole drill is a self propelled drill.

Right answer is (d) Bulldozer

To explain I would say: Depending upon the mountains, bulldozer maybe crawler tractor MOUNTED bulldozer or will tractor mounted bulldozer. The latter can attain higher travel SPEED on the JOB and can be moved on paved FLOOR WITHOUT causing damage to the floor.

Right answer is (c) OPERATION COST

Easiest explanation: The operation cost will depend on the type of equipment, conditions under which it is operated, site of project COMPRISES of fuel, lubricating oil, etc. It is possible to ESTIMATE of fairly accurate FIGURE of operation cost for any equipment.

Right answer is (d) Straight LINE

To explain I would say: Straight line method is employed to work out the cost depreciation effectively. According to this method, the total depreciation is the DIFFERENCE between ORIGINAL cost and Salvage or scrap value.

Right OPTION is (b) Feeder

The best I can EXPLAIN: The Feeder belt conveyors are operated over an easily INSTALLED track system so that the feeder TRAIN can be retracted or extended without interrupting CONCRETE placement. This conveyors are used to transport large volume of concrete.

The correct option is (c) Traveling GANTRY

Easy explanation: Traveling gantry consists of two parallel frame supporting Steel RAILS fixed on them. The rails are turned up at the ends to prevent the carriers from moving beyond the limit. Suitable lifting ARRANGEMENT is PROVIDED on the carriage.

Correct option is (a) Bucket ladder

To explain: The buckets are provided with a suitable cutting edge to facilitate digging. The material brought up by buckets is EITHER DROP directly into Hopper provided on the VESSEL or conveyed to the BARGES standing along side of the vessel.

Correct answer is (d) Blades

To explain: Each Blade has a theoretical CAPACITY of hauling a particular TYPE of earth and knowing the number of TURNS a bulldozer will make in a given time, the APPROXIMATE output of a bulldozer can be ACTIVATED.

Correct choice is (b) DRAGLINE

To EXPLAIN I would SAY: The VARIOUS types of dragline excavator are available and the factor affecting the output of a dragline excavator are- the size and type of bucket, the depth of CUTTING, length of boom and the angle of Swing.

Correct CHOICE is (c) Tile bits

The best explanation: Tile bits can be used with the hand drill, but are best used in a variable speed power drill on slow speed. When drilling glass, some form of lubricants like turpentine or white spirit should be used to keep the TIP cool. Ceramic tiles can be drilled USING a masonry bit if it is used at a slow speed.