Top 550+ Solved Thermal Engineering 2 MCQ Questions Answer
Q. How is friction due to air reduced?
a. streamlining
b. lubrication
c. by using ball bearings
d. by polishing
Q. Friction can be increased by
a. using air cushion
b. lubricants
c. using sand
d. using ball bearings
Q. When moving along a curved path, he
a. leans inwards
b. leans outwards
c. is still
d. leans sideways
Q. When a gas is pushed through a pipe, the gaseous molecules are by the pipe’s walls
a. attracted
b. absorbed
c. deflected
d. dissipated
Q. In fluid dynamics, the velocity of the fluid in the stagnation point is
a. zero
b. infinite
c. non-existent
d. negative
Q. If the speed of sound is much than that of the gas, the gas density will stay constant.
a. smaller
b. larger
c. equal to
d. non-existent
Q. Isentropic nozzle flow states about the movement of a gas or fluid through a narrow orifice without an increase or decrease in
a. accelerating
b. decelerating
c. equilibrium
d. exponential increase
Q. To refrain from separation in subsonic nozzles, the expansion angle must not be more than
a. 10 degrees
b. 20 degrees
c. 30 degrees
d. 40 degrees
Q. Gas flows through the nozzle from an area of pressure (called the chamber) to one of pressure
a. high, low
b. low, high
c. same, same
d. constant, infinite
Q. Converging-diverging nozzle is also known as
a. pascal nozzle
b. bernouille’s nozzle
c. toricelli’s nozzle
d. de laval’ nozzle
Q. When the pressure chamber is big, the flow velocities are
a. large
b. negligible
c. constant
d. increasing
Q. For a compressible, ideal gas, mass flow rate depends on parameters such as flow area, pressure, temperature, properties of the gas, and
a. avogardo’s number
b. mach number
c. reynold’s number
d. le-grange’ number
Q. On what basis are fire and water tube boilers are classified?
a. depending the combustion products formed
b. depending the state of fuel
c. depending on the steam formation rate
d. depending tubular heating surface
Q. Stirling boiler is an example of which type of boiler?
a. inclined tube boilers
b. mobile boiler
c. fire tube boiler
d. water tube boiler