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Which of the following is true about the Latent heat? a. It is an amount of heat absorbed by a unit mass of the substance to change its state. b. Temperature changes due to absorption of heat. c. S.I. unit of Latent heat is Joules per kilogram. d. Latent heat is used up in overcoming the force of attraction between the molecules of the substance.
Fourier's law of heat conduction is (where Q = Amount of heat flow through the body in unit time, A = Surface area of heat flow, taken at right angles to the direction of heat flow, dT = Temperature difference on the two faces of the body, dx = Thickness of the body, through which the heat flows, taken along the direction of heat flow, and k = Thermal conductivity of the body)
Fourier's law of heat conduction is (where Q = Amount of heat flow through the body in unit time, A = Surface area of heat flow, taken at right angles to the direction of heat flow, dT = Temperature difference on the two faces of the body, dx = Thickness of the body, through which the heat flows, taken along the direction of heat flow and k = Thermal conductivity of the body)
"It is now expected that the variable production cost per unit and the selling price per unit will each increase by 10%, and fixed production cost will rise by 25%. What will be the new break even point?
Selling price - Rs 6 per unit
Variable production cost - Rs 1.20 per unit
Variable selling cost - Rs 0.40 per unit
Fixed production cost - Rs 4 per unit
Fixed selling cost - Rs 0.80 per unit
Budgeted production and sales for the year are 10,000 units."
A Carnot heat engine receives heat at 750 K and rejects the waste heat to the environment at 300 K. The net work output of the heat engine is used to drive a Carnot refrigerator, whose COP is 6.14. If the heat removal rate from the refrigerated space is 6.6 kW, determine the rate of heat supply to the heat engine?
Consider the following statements regarding heat waves in India.  I. Heat waves mostly occur over Rajasthan, Punjab and Haryana towards the end of April but they mainly take place in May.  II. Any heat wave lasts for around 4-5 days.  III. If there is an increase in temperature by 6-7 degrees Celsius above normal, that is known as the Moderate Heat Wave whereas if it is 8 degree Celsius or more, that is known as Severe heat wave.  Which among the above statements is/are correct regarding the heat waves?
Consider the following statement: a) In a refrigerator the heat is taken out from the system. b) In a refrigerator the heat is given to the system. c) In a heat pump the heat is taken out from the system. d) In a heat pump the heat is given to the system. Which of the above statements are correct?
A product 'A' comprises of 2 units of B and 3 units of C. Each unit of B requires 2 unit of D and one unit of E. Each unit of C needs 2 units of E and one unit of F. How many number of end units of E are required for producing 2 units of A ?
Which of the following are the functions of lubrication in a bearing unit ? 1. To protect the bearing components from corrosion. 2. To absorb heat from the bearing unit. 3. To carry heat away from the bearing unit. Select the correct answer using the code given below
Which of the following statements about Printed circuit heat exchanger are correct? Statement 1: Printed circuit heat exchanger is an example for direct heat exchanger. Statement 2: It has high heat transfer surface area per unit volume of the exchanger.