Complete GATE AR 2022 Paper 1 overview, original pages and practice · Timed previous-paper practice

Questions 64–66 of 81. Imported answers require review unless explicitly marked reviewed.

Paper practice 81 questionsPage 22 of 27

Question 64

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ARNAT2 marksNeeds review
The acoustical absorption of a wall panel in each octave band is tabulated below. The Noise Reduction Coefficient of the wall panel (rounded off to two decimal places) is __________.
63 Hz
125 Hz
250 Hz
500 Hz
1000 Hz
2000 Hz
4000 Hz
8000 Hz
1600 Hz
0.1
0.2
0.5
0.5
0.7
0.8
0.8
0.9
0.9

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Question 65

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ARNAT2 marksNeeds review
A room is maintained at a wet bulb temperature of 25 °C, globe temperature of 30 °C, and air velocity of 0.5 m/s. The decrease in Tropical Summer Index when the air velocity is increased to 3 m/s (in °C, rounded off to two decimal places) is __________.

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Question 66

Open question
ARMCQ1 markNeeds review
Which of the following is the National Electronic Toll Collection System implemented by the National Payment Corporation of India?
Your answerChoose one option.

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