text: # Chapter 5 : Combustion in SI Engines¶
  
  ## Example 5.1 Page No : 178¶
  
  In [1]:
  #Given:
  theta_s = 25.      #Angle at which spark occured before top dead centre in degrees
  theta_d = 3.      #Angle at which delay ended before top dead centre in degrees
  theta_c = -12.      #Angle at which combustion finish after top dead centre in degrees
  p = 15.      #Percentage increase of delay period at half clomath.sing the throttle
  
  #Solution:
  DP = theta_s-theta_d      #Delay period in degrees
  CP = theta_d-theta_c      #Combustion period in degrees
  #(a)Full throttle, half speed
  DA1 = DP/2      #Delay angle in degrees
  TP1 = DA1+CP      #Total period in degrees
  TS1 = TP1+theta_c      #Time of spark before top dead centre in degrees
  #(b)Half throttle, half speed
  DA2 = (DP/2)+(DP/2)*p/100      #Delay angle in degrees
  TP2 = DA2+CP      #Total period in degrees
  TS2 = TP2+theta_c      #Time of spark before top dead centre in degrees
  
  #Results:
  print " a)Full throttle, half speed\t Time of spark before top dead centre is %d degree"%(TS1)
  print " a)Half throttle, half speed\t Time of spark before top dead centre is %.2f degree"%(TS2)
  
   a)Full throttle, half speed	 Time of spark before top dead centre is 14 degree
  a)Half throttle, half speed	 Time of spark before top dead centre is 15.65 degree
explanation: The document contains a math problem related to combustion in SI engines. It provides given values and a solution to calculate the time of spark before top dead centre under different conditions. The document includes both the question and the answer.
distilabel_metadata.content: Evaluate the user given text extract and determine if it contains a math question and optionally and answer to this question.
  
  Output rules:
  
  1. Briefly describe the document and mention if it contains a question or a question and answer.
  2. Finalize the output with: Label: no-question,question,question-and-answer,multiple-question,multiple-question-and-answer
distilabel_metadata.role: system
distilabel_metadata.content: # Chapter 5 : Combustion in SI Engines¶
  
  ## Example 5.1 Page No : 178¶
  
  In [1]:
  #Given:
  theta_s = 25.      #Angle at which spark occured before top dead centre in degrees
  theta_d = 3.      #Angle at which delay ended before top dead centre in degrees
  theta_c = -12.      #Angle at which combustion finish after top dead centre in degrees
  p = 15.      #Percentage increase of delay period at half clomath.sing the throttle
  
  #Solution:
  DP = theta_s-theta_d      #Delay period in degrees
  CP = theta_d-theta_c      #Combustion period in degrees
  #(a)Full throttle, half speed
  DA1 = DP/2      #Delay angle in degrees
  TP1 = DA1+CP      #Total period in degrees
  TS1 = TP1+theta_c      #Time of spark before top dead centre in degrees
  #(b)Half throttle, half speed
  DA2 = (DP/2)+(DP/2)*p/100      #Delay angle in degrees
  TP2 = DA2+CP      #Total period in degrees
  TS2 = TP2+theta_c      #Time of spark before top dead centre in degrees
  
  #Results:
  print " a)Full throttle, half speed\t Time of spark before top dead centre is %d degree"%(TS1)
  print " a)Half throttle, half speed\t Time of spark before top dead centre is %.2f degree"%(TS2)
  
   a)Full throttle, half speed	 Time of spark before top dead centre is 14 degree
  a)Half throttle, half speed	 Time of spark before top dead centre is 15.65 degree
distilabel_metadata.role: user
distilabel_metadata.raw_output_q_a_detector_0: The document contains a math problem related to combustion in SI engines. It provides given values and a solution to calculate the time of spark before top dead centre under different conditions. The document includes both the question and the answer.
  
  Label: question-and-answer