271. Couple close roof is suitable for maximum span of________________?
A. 2.5 m
B. 3.5 m
C. 4.5 m
D. 5.5 m
✅ The correct answer is option C.
Civil Engineering
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272. A mortar joint in masonry which is normal to the face of wall is known as_________________?
A. bed joint
B. wall joint
C. cross joint
D. bonded joint
✅ The correct answer is option C.
273. Which of the following bricks are used for lining of furnaces ?
A. overburnt bricks
B. underburnt bricks
C. refractory bricks
D. first class bricks
✅ The correct answer is option C.
274. The type of arch generally constructed over a wooden lintel or over a flat arch for the purpose of carrying the load of the wall above is_______________?
A. segmental arch
B. pointed arch
C. relieving arch
D. flat arch
✅ The correct answer is option C.
275. The term string is used for______________?
A. the underside of a stair
B. outer projecting edge of a tread
C. a sloping member which supports the steps in a stair
D. a vertical member between two treads
✅ The correct answer is option C.
276. Crushing strength of a first class brick should not be less than_____________?
A. 3.5 N/mm2
B. 7.0 N/mm2
C. 10.5 N/mm2
D. 14.0 N/mm2
✅ The correct answer is option C.
277. Which of the following is a rock ?
A. quartz
B. mica
C. gypsum
D. none of the above
✅ The correct answer is option C.
278. The plywood______________?
A. has good strength along the panel only
B. can be spilt in the plane of the panel
C. has greater impact resistance to blows than ordinary wood
D. cannot be bent more easily than ordinary wood of same thickness
✅ The correct answer is option C.
279. Three basic raw materials which are needed in large quantities for production of steel are_______________?
A. iron ore, coal and sulphur
B. iron ore, carbon and sulphur
C. iron ore, coal and lime stone
D. iron ore, carbon and lime stone
✅ The correct answer is option C.
280. In any good staircase, the maximum and minimum pitch respectively should be_____________?
A. 90° and 0°
B. 75° and 30°
C. 60° and 10°
D. 40° and 25°
✅ The correct answer is option D.