Momentra

Question 1

The viscosity of a gas
a. decreases with increase in temperature
b. increases with increase in temperature
c. is independent of temperature
d. is independent of pressure for very high pressure intensities

Answer 1

b. increases with increase in temperature

Question 2

The dimensionless number that characterizes the flows of fluid in a
conduit.
a. Nusselt number c. Grashof number
b. Peclet number d. Reynolds number

Answer 2

Reynolds number

Question 3

Turbulent flow generally occurs for cases involving
a. viscous fluid
b. very narrow passages for capillary tube
c. very slow motions
d. none of these

Answer 3

d. none of these

Question 4

For an ideal fluid flow, the Reynolds number is
a. 2100 c. zero
b. 100 d. infinity

Answer 4

infinity

Question 5

When a fluid flows through a reducer in a piping system, the velocity
at the outlet end is _ the velocity at the inlet.
a. less than c. the same as
b. more than d. one-half

Answer 5

a. more than

Question 6

For pipes that must be broken at intervals for maintenance, the
connector used should be a/an
a. union c. tee
b. reducer d. elbow

Answer 6

a. union

Question 7

Which valve is used accurately to regulate the flow of liquids and
gases at low flow rates?
a. needle valve c. ball valve
b. check valve d. globe valve

Answer 7

a. needle valve