Heating and Cooling Factor MCQ

Test your knowledge with important Heating and Cooling Factor MCQ and their applications. These MCQs are beneficial for competitive exams too. Explore 30 + more Heating and Cooling Factor MCQs at Bissoy

• Higher the value of contact factor, poor is the performance of the coil.
  ক

  True

  খ

  False
• For given conditions, td1 = 288 K, td2 = 301 K and td3 = 314 K, the value of by-pass factor and contact factor is equal.
  ক

  True

  খ

  False
• What is the contact factor for cooling coil, if td1 = 44°C, td2 = 26°C and td3 = 19°C?
  ক

  0.62

  খ

  0.72

  গ

  0.78

  ঘ

  0.18
• What is the contact factor for heating coil, if td1 = 11°C, td2 = 32°C and td3 = 47°C?
  ক

  0.5833

  খ

  0.4833

  গ

  0.7833

  ঘ

  0.1833
• What is the efficiency of the coil, if BPF = 0.6913?
  ক

  1.6913

  খ

  0.4467

  গ

  0.3087

  ঘ

  1.4467
• What is the value of logarithmic mean temperature if td1 = 300 K, td2 = 400 K and BPF = 0.75?
  ক

  70°C

  খ

  79°C

  গ

  85°C

  ঘ

  75°C
• What is the value of BPF, if U = 1.9 W/m2 K, Ac = 1.1 m2 and ma = 0.97 kg?
  ক

  0.14

  খ

  0.12

  গ

  0.13

  ঘ

  0.15
• What is the value of sensible heat given out by the coil, if U = 198 W/m2 K, Ac = 11 m2 and tm = 0°C?
  ক

  1

  খ

  0

  গ

  594594

  ঘ

  543636
• If the value of BPF for one row of the coil is 0.4, then what is the value of BPF for 12 similar rows?
  ক

  0.00000167

  খ

  0.0000167

  গ

  0.00167

  ঘ

  0.000167
• If the value of BPF for one row of the coil is one, then what is the value of BPF for 3872 similar rows?
  ক

  3872

  খ

  3871

  গ

  3873

  ঘ

  1
• What is the By-pass factor for cooling coil, if td1 = 49°C, td2 = 36°C and td3 = 30°C?
  ক

  0.315

  খ

  0.31

  গ

  0.320

  ঘ

  0.3
• What is the By-pass factor for heating coil, if td1 = 19°C, td2 = 25°C and td3 = 37°C?
  ক

  0.75

  খ

  0.4

  গ

  0.7

  ঘ

  0.1
• The value of BPF for the heating and the cooling coil is different under the same temperature conditions.
  ক

  True

  খ

  False
• A coil with low BPF has better performance.
  ক

  True

  খ

  False
• What is the contact factor for cooling coil, if td1 = temperature at entry, td2 = temperature at exit and td3 = coil temperature?
  ক

  td1 – td2 / td1 – td3

  খ

  td2 – td1 / td3 – td1

  গ

  td3 – td2 / td2 – td1

  ঘ

  td3 – td2 / td1 – td2
• What is the contact factor for heating coil, if td1 = temperature at entry, t2 = temperature at exit and td3 = coil temperature?
  ক

  td3 – td1 / td3 – td1

  খ

  td2 – td1 / td3 – td1

  গ

  td3 – td2 / td2 – td1

  ঘ

  td3 – td2 / td1 – td2
• What is the efficiency of the coil?
  ক

  1 + BPF

  খ

  1 / BPF

  গ

  BPF

  ঘ

  1 – BPF
• What is the formula of logarithmic mean temperature in terms of By-pass factor? b) Tm = td2 – td1 / log10 c) Tm = td2 – td1 / loge d) Tm = td2 – td3 / loge
  ক

  Tm = td2 – td1 / loge

  খ

  1/BPF

  গ

  1/BPF

  ঘ

  1/BPF
• What is the value of sensible heat given out by the coil?
  ক

  U Ac tm

  খ

  U Ac

  গ

  U tm

  ঘ

  U Ac2 tm
• If the value of BPF for one row of a coil is y then what is the value of BPF for n similar rows?
  ক

  n / y

  খ

  n + y

  গ

  (y)n

  ঘ

  n x y
• What is the By-pass factor for cooling coil, if td1 = temperature at entry, td2 = temperature at exit and td3 = coil temperature?
  ক

  td3 – td1 / td3 – td1

  খ

  td3 – td2 / td3 – td1

  গ

  td3 – td2 / td2 – td1

  ঘ

  td2 – td3 / td1 – td3
• What is the By-pass factor for heating coil, if td1 = temperature at entry, td2 = temperature at exit and td3 = coil temperature?
  ক

  td3 – td1 / td3 – td1

  খ

  td3 – td2 / td3 – td1

  গ

  td3 – td2 / td2 – td1

  ঘ

  td3 – td2 / td1 – td2