KPSC Water Resource Department Junior Engineer Mechanical Question Paper 2017 with Answer Key

41) Which of the following statements is/are correct about fire tube boilers ? A. The hot products of combustion pass through the tubes which are surrounded by water. B. Fire tube boilers have low initial cost. C. Fire tube boilers are more likely to explosion

Answer is:

All of the above

42) The ratio of fibre length to its diameter in a composite material is called

Answer is:

Aspect Ratio

43) If the mechanical properties of a composite improves as a result of increasing the average fibre length, then it is called

Answer is:

Short fibre

44) According to Gibb's phase rule, the number of component phases and number of degrees of freedom in a system at equilibrium is given by where, P = number of phases, F = number of degrees of freedom, C = number of components in a system in equilibrium.

Answer is:

P + F = C + 2

45) An intensive property of a thermodynamic system is

Answer is:

Temperature

Explanation:

Extensive properties The properties of the system, whose value for the entire system is equal to the sum of their values for the individual parts of the system, are called extensive properties.
For example, total volume, total mass and total energy of a system are extensive properties.

Intensive properties The properties of the system, whose value for the entire system is not equal to the sum of their values for the individual parts of the system, are called intensive properties.
For example, temperature, pressure and density of a system are intensive properties.