Related Questions

Forepoling method is generally adopted for tunnelling in:
A Soft ground
B Firm ground
C Running ground
D None of these
Which one of the following methods of tunnelling does not require the use of time bearing?
A Linear plate method
B Shield method
C Compressed air method
D All of these
Mr. Abul Kashem has set up a pultry firm with investment of TA, 50,000. He gets an average yearly income of TA. 36,000 from the firm, If he did not set up this poultry firm, with this investment he could set up a grocery shop. From such grocery he could get an yearly income of TA. 39,000. What is the opportunity cost of the Poultry firm that Mr. Kashem is running?
A TA. 50,000
B TA. 37,500
C TA. 39,000
D TA. 11,000
Which one of the following statements is not correct for heading and benching method of tunnelling?
A Drilling and mucking can be done simultaneously
B Benching provides a platform for working on heading
C Removal of muck from the heading is very easy
D None of these
Which one of the following statements is not correct with regard to heading and henching method of tunnelling?
A Driving of tunnel is done in two portions of its section
B Driving the top portion is done in advance of the bottom portion
C The holes in head and bench are loaded together with explosive for blasting
D Firing of head holes is done just before the bench holes are fired
Pick up the explosive used for tunnelling in soft rocks from the following:
A Blasting gelatine
B Special gelatine
C Ammonia dynamite
D Semi-gelatine
The most suitable soil for compressed air tunnelling is
A Silt
B Sand
C Clay
D Gravel
In compressed air tunnelling, the volume of free air provided is
A 6 m3 per second per m2 of face area
B 6 m3 per minute per m2 of face area
C 20 m3 per minute per m2 of face area
D 6 m3 per hour per m2 of face area
The length of the needle beam used in needle beam method of tunnelling is usually
A 2 m to 4 m
B 2.5 m to 6 m
C 4 m to 7 m
D 5 m to 6 m
In Belgium method of tunnelling
A Construction of side walls is completed before invert and roof arch are built
B Construction of roof arch is completed before side walls and inverts are built
C Construction of invert is completed before side walls and roof arch are built
D Construction of invert and side walls is completed before roof arch is built

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