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MET211-Lab-Practical questions -_lab_ex._2

Lab-Practical questions -_lab exam questions

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MET211-Lab-Practical questions -_lab_ex._2

  1. 1. 1 MET 211-L : APPLIED THERMODYNAMICS LABORATORY Lab Ex. No. : 2 Title : Determination of Saybolt Viscosity Practical questions involving the use of Saybolt Viscometer: Question 1 What is the use of the thermometer in the Saybolt Viscometer? Answer: a. To measure the temperature of the oil sample. b. To monitor the temperature of the oil sample at a required fixed value. Question 2 What is the function of the stirrer paddles inside the oil bath of the Saybolt Viscometer? Answer: To maintain a uniform temperature of the oil bath. Question 3 Why do you need to stir the oil sample inside the cylinder? Answer: To maintain a uniform temperature. Question 4 Up to what level do you have to fill the cylinder with oil sample? Answer: Fill the test cup up to the line or groove. Question 5 What is the function of the heater in the viscometer? Answer: Heat the test sample during calibration. Question 6 What is the function of the 60-ml receiving flask? Answer: To measure the volume of oil sample up to 60-ml mark. Question 7 Define Saybolt Universal Viscosity Answer: It is the efflux time in seconds of sample flowing through a calibrated universal orifice to fill up the 60-ml receiving flask under carefully controlled specified conditions. Question 8 Define Saybolt Furol Viscosity Answer: It is the efflux time in seconds of sample flowing through a calibrated furol orifice to fill up the 60-ml receiving flask under carefully controlled specified conditions. Question 9 What should be the calibrated temperature of petroleum sample for universal orifice? Answer: 37.8 °C. Question 10 What should be the calibrated temperature of petroleum sample for furol orifice? Answer: 50.0 °C. Question 11 What is the objective of this laboratory exercise? Answer: To determine the viscosity of a certain petroleum sample using Saybolt Viscometer.
  2. 2. 2 Question 12 What is the function of the timer in this laboratory exercise? Answer: To measure the efflux time for the sample to fill the 60-ml receiving flask. Question 13 What are the two types of orifices used when using Saybolt Viscometer? Answer: a. Universal orifice b. Furol orifice Question 14 What is the meaning of (a) SUV? (b) SFV? Answer: a. SUV – Saybolt Universal viscosity b. SFV – Saybolt Furol viscosity Question 15 What is the unit of viscosity for Saybolt viscometer? Answer: Seconds – SUS or SFS Table of Components: No. Name of Item 1 Thermometer 2 Thermometer support 3 Timer 4 Cork/Rubber stopper 5 60-ml Receiving flask 6 Orifice (Universal /Furol) 1 2 3 5 4 6

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