Top 550+ Solved Thermal Engineering 2 MCQ Questions Answer
Q. In vapour refrigeration cycle, which of the following is used for expansion?
a. expansion engine
b. throttling valve or capillary tube
c. both of the mentioned
d. none of the mentioned
Q. Which of the following operations occur in a vapour refrigeration cycle?
a. compression
b. cooling and condensing
c. expansion and evaporation
d. all of the mentioned
Q. Which among the following is an assumption of the compressible flow?
a. resistance to flow of object
b. no-slip condition
c. known mass flow rate
d. resistance to flow of heat
Q. What is Mach number?
a. speed of object * speed of sound
b. speed of object /speed of sound
c. speed of object + speed of sound
d. speed of object- speed of sound
Q. Which of the following kinetic friction is smaller?
a. limiting friction
b. static friction
c. rolling friction
d. sliding friction
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