Dear Readers, Welcome to Construction Equipment Interview Questions and Answers have been designed specially to get you acquainted with the nature of questions you may encounter during your Job interview for the subject of Construction Equipment. These Construction Equipment Questions are very important for campus placement test and job interviews. As per my experience good interviewers hardly plan to ask any particular questions during your Job interview and these model questions are asked in the online technical test and interview of many IT & Non IT Industries.
? Volume of the material to be removed
? Size of the machine used
? Depth of excavation
? Height to be lifted
? Soil type
? Duration of period
? Rented or purchased
? Production cost
? Spares availability
? Skilled operation
a) Crawler or track type
b) Wheel or pneumatic type Bull dozer & Angle dozers
a) Crawler-drawn scraper
b) Two-axle scraper
c) Three-axle scraper Power shovels
1.The crawler moves on an endless chain.
2.They are slow speed.
3.They are used for uneven & rough ground.
4.They have a speed of about 12 Km/h.
Pneumatic type wheels:
1.It moves on pneumatic tyres.
2.They are faster in speed.
3.They operate best on smooth roads.
4.They have a speed of about 50 Km/h.
? Crawler-drawn scraper
? Two-axle scraper
? Three-axle scraper
? It is used to excavate the earth of all classes and load it into wagons.They are mounted on crawler tracks.It consist of a mountain ,cab,boon,dipper ,stric,hoist line.
? Towed static smooth compactors
? Static sheep foot or pad foot compactors
? Static three wheel self propelled compactors
? Static tandem compactors
? Three axle static compactors
? Rubber tyred compactors
? Vibrator compactors
a) Tandem vibrator compactors
b) Towed vibrator compactors
c) Sheep foot & tamping foot vibrator compactors
d) Self-propelled vibrator compactors
e) Hand guided vibrator compactors
? Belt conveyors
? Roller conveyors
? Chain conveyors
? Pipe conveyors
? Elevating conveyors
? Its suitable levels eliminate a good deal of lifting and lowering of material.
? It require no stopping or standing but is continuous operation.
? Transportation is affected by friction between material being transported and the belt.
? It largely saves labor cost.
? No noise
? Carry the material horizontal,vertical,inclined.
? It can withstand 1600 C.
? Size & Mechanical condition of the scraper
? Hauling device
? Condition of the haul road
? Characteristics of soil & work area
? Output of scraper in bank volume/hr =Optimum loose volume loaded/trip x S x 60/t x efficiency
o Where ,S= Swell factor
? T =cycle time/trip in miniutes.
? It have various earthmoving jobs,like laying pipes,removing trees,excavation of drains,general earth moving jobs of cleaning area,loading,etc,It is also used for excavation of houses & building foundation,trenches for irrigation,sewage,cables,gas & oil pipe lines.Maintenance & cleaning of rivers,cannals,irrigation.It is also used for loading of material like earth,coal,aggregate,etc.
? Crawler mounted excavators
? Truck mounted excavators
? Self propelled excavators
? Excavators mounted on barge or rail
? Hydraulic excavators
? Excavators loader
? Bucket wheel excavators
? Better loading ability
? It is self loading one in addition to self propelled capabilities.
? The chain rotated by power independent of the travel of the scraper.
? It has a variable speed
? It has a very good finishing ability.
? Pusher not required
? It gives uniform compaction
? They are capable of loading most materials except rock and boulders.
? When working in hard ground the surface should be pre broken by a ripper or scarifier
? and assistance in cutting should be given by a pushing vehicle.
? Where possible the cutting operation should take place down hill to take full advantage of the weight of the unit.
? Haul roads should be kept smooth to enable the machine to obtain maximum speed.
? Recommended tyre pressure should be maintained.
? Size, distance,Road condition,soil type,Efficiency of engine.
? It is used for leveling and smoothening the earth work.Spreading and leveling the base course in the construction of roads and air fields.This blade can be rotated at 3600 and also used as
? ditching and trenching operation.
? Gravel road repairing
? Ditch filling or digging
? Level or sloped ground finishing
? Snow clearance
? Land clearance
? Base course of spreading and leveling
? Crawler type
? Wheel type
? Two wheeled Four wheeled
? Road cleaning
? Back filling
? Side fills & cuts
? The output of the dozer depends on:
? Size & condition of the dozer.
? Distance travelled by the dozer.
? Speed of operation.
? Characteristics of soil being handled.
? Surface on which dozer is operating, soil condition, etc
? Excavators are basically used for soil, it is a digging machine.
? The hydraulic system is very productive and efficient.
? It is rotated at 3600
? This can be fitted with various multipurpose attachments for various works like laying pipe, removing trees, excavating drain, clearing, loading, etc.
? Trenchers are the equipment used for excavating trenches or ditching of variable depth. It is used to trench the water lines, pipe lines, oil line cables, drainage and sewer. These are usefull for digging canal works.