The normal threshold of hearing is around .

A 60-80 db
B 45-60 db
C 100-120 db
D 25-45 db

Correct Answer: 25-45 db

শব্দ শোনার স্বাভাবিক সীমা হলো ২৫ - ৪৫ db। ডেসিবল (db) হলো শব্দের তীব্রতা পরিমাপের একক। মানুষ সর্বোচ্চ ১৪০ ডেসিবল শব্দ সহ্য করতে পারে। ১৫০ db কানের পর্দা ফাটিয়ে দিতে পারে এবং ১৮০ - ২০০ db শব্দ মৃত্যু ঘটাতে পারে।
Bissoy MCQ
#সাধারণ জ্ঞান #Rupali Bank Ltd #সিনিয়র অফিসার ১৫. ১১.২০১৯

Related Questions

If Bashar can run around a ground four times in 20 minutes and Rahim can run around the same ground three times in 12 minutes, who can run around that ground more times in an hour, and how many times more can he run around ?
A Bashar, three times more
B Rahim , three times more
C They both go around 12 times
D Bashar, eight times more
Each of the following problem has a question and two statements which are labeled 1. and. Use the data given in 1. and 2. to decide whether the statements are sufficient to answer the question.Select one of the following . a.Statements (1) ALONE is sufficient,but (2) ALONE is not sufficient. b.Statements (2) ALONE is sufficient,but (1) ALONE is not sufficient. c. Both statement TOGETHER are sufficient but statement alone is sufficient . A fly crawls around the outside of a circle once.A second fly crawls around the outside of a square once.Which fly travels further ? (1) The diagonal of the square is equal to the diagonal of the circle.(2) The fly crawling around the circle took more time to complete has journey than the fly cawing around the square.
A A
B B
C C
D D
Hearing the noise, the boy work up, Here the word 'hearing' is a/an-
A noun
B participle
C verb
D adverb
Hearing of the case will be held next week.The word hearing is ----.
A a noun
B an adjective
C verb
D adverb
In a reaction, the threshold energy is equal to (where, A = activation energy N = normal energy of reactants)
A A
B N
C A+N
D A-N
Two circular dials of exactly the same size are mounted on a wall side by side in such a way that their perimeters touch at one point. Dial 1, which is on the left , spins clockwise around its center , and dial 2 , which is on the right spins counter clockwise around its center . (Assume that there is no friction at the point of contact between the dials.) Each dial is marked on its perimeter at three points that are at equale distances around the points arked ondial 1 are N, O, and P and the points marked on dial 2 are X, Y, and Z. If points O and Z are just meeting at the point of contact between the dials , and if dial 1 spins at the same speed as dial 2, what is the smallest number of revolutions of each dial that will bring O and Z together again?
A 1
B 2
C 3
D 4
কোন তীব্রতার মাত্রাকে কানের শ্রবণসীমা (threshold of audibility of ear) বলে?
A 10 dB
B 0 dB
C 2 dB
D 1 dB
What is meant by ‘threshold’?
A level of contraction
B level of mind
C Level of the beginning
D level of finish
The threshold markings are
A 4 m wide
B 1 m clear space between adjacent
C Placed symmetrically on either side of the runway centre line
D All the above
Runway threshold is indicated by a series of parallel lines starting from a distance of
A 3 m from runway end
B 6 m from runway end
C 10 m from runway end
D 15 m from runway end

Next steps