Bachelor of Engineering Science Flashcards
7 cards from real BE/B Eng Bachelor of Engineering practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 7 Bachelor of Engineering Science flashcards as text
Which dimensionless number represents the ratio of inertial forces to viscous forces in fluid flow?
Answer: Reynolds number
The Reynolds number (Re = ρvL/μ) determines whether flow is laminar or turbulent by comparing inertial to viscous forces.
In digital logic, what is the output of a NAND gate when both inputs are HIGH?
Answer: LOW
A NAND gate outputs LOW only when all inputs are HIGH; it is the complement of an AND gate.
Which material property describes resistance to permanent deformation under stress?
Answer: Hardness
Hardness measures a material's resistance to surface indentation or permanent deformation, commonly tested via Vickers or Rockwell methods.
What is the primary purpose of a flywheel in a mechanical system?
Answer: Store rotational kinetic energy
A flywheel stores rotational kinetic energy (KE = ½Iω²) to smooth out fluctuations in angular velocity.
In thermodynamics, a Carnot cycle operating between 600 K and 300 K has a maximum theoretical efficiency of:
Answer: 50%
Carnot efficiency = 1 − T_cold/T_hot = 1 − 300/600 = 0.50 or 50%.
Which structural analysis method satisfies both equilibrium and compatibility conditions?
Answer: Finite element method
The finite element method satisfies both equilibrium (force balance) and compatibility (displacement continuity) through variational formulations.
In control systems, the steady-state error for a unit ramp input applied to a Type-1 system equals:
Answer: 1/Kv
A Type-1 system has one integrator; its steady-state ramp error is 1/Kv where Kv is the velocity error constant.