Related Questions

0.5 kg বরফকে 0°C থেকে 1000°C এ বাম্পে পরিণত করতে কত তাপ দরকার? [বাম্পীয় ভবনের সুপ্ততাপ  22.68×105 Jkg-1  , পানির সুপ্ততাপ 4.2×103 Jkg-1K-1 এবং বরঢ গলনের সুপ্ততাপ    33.4×104 Jkg-1  ]
A 1011 KJ
B 1511 KJ
C 5111 KJ
D 71.11 KJ
বরফ গলনের আপেক্ষিক সুপ্ততাপের পরিমাণ-i. 36000 Jkg-1ii. 334000 Jkg -1iii. 336520 Jkg-1 নিচের কোনটি সঠিক?
A i
B ii
C i ও ii
D i, ii ও iii
Thermal conductivity based continuous flue gas analyser makes use of varying thermal conductivity of the constituents of flue gases. Which of the following constituents of flue gases has the maximum thermal conductivity?
A CO2
B N2
C O2
D CO
0°C তাপমাত্রার 2.1kg বরফ 40°C তাপমাত্রার 5.9kg পানির সাথে মিশ্রিত করা হলো। মিশ্রণের তাপমাত্রা কত হবে? পানির আপেক্ষিক তাপ= 4.2×10³ Jkg-1K⁻¹, বরফ গলনের আপেক্ষিক সুপ্ততাপ = 3.36×10⁵ Jkg⁻¹
A 8.5°C
B 10.5°C
C 9.5°C
Draught produced by a tall chimney due to density difference between hot flue gas inside the Chimney and atmospheric air outside the chimney is more appropriately known as the __________ draught.
A Natural
B Induced
C Forced
D Chimney
Power required in case of forced draught as compared to induced draught (for the same draught produced) is
A Same
B Less
C More
D Either more or less; depends on the flue gas density
For the same draught produced the power of induced draught fan as compared to forced draught fan is
A less
B more
C same
D not predictable
What is the perimeter, in meters, of a rectangular garden 6 meters wide that has the same area as a rectangular playground 16 meters long and 12 meters wide?
A 60
B 76
C 192
D None of these
A rectangular floor that measures 8 meters by 10 meters is to be covered with concept squares that each measures 2 meters by 2 meters. If a carpet square costs to cover 2/3 of the floor?
A ১৬০টাকা
B ১৮০টাকা
C ২৪০টাকা
D ৪৮০টাকা
A rectangular floor that measures 8 meters by 10 meters is to be covered with carpet squares that each measure 2 meters by 2 meters . If a carpet square costs Tk. 12, calculate the total cost to cover 23 of the floor?
A Tk. 160
B Tk. 240
C Tk. 480
D None of these

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