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During the construction period, price variation clause in contracts, caters to:
Match List-I with List-II select the correct answer using the codes given below the lists:
A. Piece work contract.
B. Lump sum contract
C. Item rate contract.
D. Labour contract"
1. Not practised in government
2. Payment made by detailed measurement of different items
3. Adopted for touildjngs, roads, bridges and electrical works
4. Petty works and regular maintenance work
800 units of a certain item of stock are needed over each yearly period. The unit cost is 400 and the cost of each order is Rs. 150 carrying cost is 1.5%. The EOQ is
A construction concrete mixer of capacity 0.8 m3 is used and the mixer discharges the entire batch of concrete into a single hopper. The time per cycle may be taken for charging, mixing and discharging mixes as 1.6 minutes and lost time may be taken as 0.15 minutes. The number of batches per hour is equal to
Let number of batches in an hour be n.
Lost time = 0.15n
Match List-I with List-ll and select the correct answer using the codes given below the lists;
A. Self-loading scraper
B. Narrowtread high pressure type
1. Reduce loss in power
2. Rim pull management
3. Lower rolling resistance
4. Compromise between loading and hauling performances
Scrapers can be used in a wide range of material types (including shot rock) and are economical over a wide range of haul lengths and haul conditions. They are a compromise between machines designed exclusively for cither loading or hauling. The rolling resistance varies with size of, pressure on tire and tread of tire. A narrow tread gives high pressure and lower rolling resistance than a broad tread, low pressure tire on a hard surface road due to small area of contact between the tire and road surface.
The effect of the loss in power due to altitude can be eliminated by the installation of a supercharger. This is a mechanical unit that will increase the pressure of the air supplied to the engine, thus enabling sea-level performance at any altitude.
Rimpull designate the tractive force between the rubber tires of driving wheels and the surface on which they travel. If the coefficient of friction is high enough to eliminate tire slipping, the maximum rimpull is a function of the power of the engine and the gear ratios between the engine and the driving wheels..
The output Q of the earth moving equipment like excavators, shovels, loaders (where 'q' is production per cycle in m3 and ‘c’ is cycle time in seconds) is
For a given load rating, the operating radius of crane can be increased by
Which of the following are the disadvantages of non-tilting type concrete mixers?
1. They are not favoured when large sized aggregates are used.
2. Mixing of the concrete occurs through both rolling and pulling from buckets.
3. Content of fines is increased.
4. They are not easy to clean.
Select the correct answer using the codes given below.
The non-tilting type of mixer is suitable for small works and aggregate size not greater than 7.5 cm. With large sized aggregates, segregation may take place.
Match List-I (Type of cranes) with List-ll (Characteristic) and select the correct answer using the codes given below the lists:
A. Hydraulic crane
B. Electric overhead crane
C. Travelling bridge crane
D. Hammerhead crane
1. Has legs moving on tracks laid on the floor
2. Has cantilever arms on both sides
3. Has the unique advantage that the boom length and the angle can be changed during operation
4. Has three -way motion in mutually perpendicular directions