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    Based on speed, which of the following types of turbines is slower?
    
    
    
	30. Based on speed, which of the following types of turbines is slower?
    
      - Heavy-frame industrial gas turbines
 
      - Aeroderivative gas turbines
 
      - Both A and B
 
      - None
 
    
    Answer: A) Heavy-frame industrial gas turbines
    Explanation:
    Heavy-frame industrial gas turbines have a slower rotational speed than aero-derivative gas turbines because they are intended for large-scale industrial applications, and if the slower rotational speed is present, larger turbine components such as the rotor and blades can be used.