BME Cheat Sheet 2026

The 30 highest-yield BME facts, distilled from real exam questions. Print it, save it as a PDF, or study it here — free, no sign-up.

1. Which of the following transfer functions represents a pure integrator? → K/s
2. Iron and carbon are the basic components of steels. Which of the aforementioned subgroups do they belong ? → Metallic Solid
3. A system's heat input and output are denoted by the symbols __ and ________, respectively. → positive, negative
4. A great refractory material is ceramic. A substance is referred to as refractory if it: → retains its strength at high temperatures
5. In fluid mechanics, the stagnation point is the location when the fluid's velocity is . → zero
6. Radial flow reaction turbines' primary components are . → All of the mentioned
7. Which type of stress is induced in a shaft subjected to twisting? → Shear stress
8. Which of the following best describes the fundamental tenet of fluid mechanics? → All of the mentioned
9. For a blackbody, the emissivity (ε) equals: → 1
10. For a type-1 feedback control system subjected to a unit ramp input r(t) = t, the steady-state error is: → 1/Kv, where Kv is the velocity error constant
11. There is some resistance to sliding between two bodies' surfaces when they come into touch; this is called . → Friction
12. In ASME Y14.5 GD&T, the Maximum Material Condition (MMC) modifier means: → The feature contains the most material within its tolerances
13. When does a fluid become laminar? → Conservation of linear momentum
14. What does fluid dynamics entail? → Study of fluid behaviour at rest and in motion
15. The interference fit between a shaft and a hub is designed to transmit load by: → Friction from radial pressure
16. The loading in the cable under its own weight has little effect on the cables' Integrity. → Geometry
17. In vibration analysis, a node point is where: → Amplitude is zero in a mode shape
18. Turbines with water flowing through them are known as radial flow reaction turbines. → Radial direction
19. Discharge through a reaction turbine with radial flow is . → Both P1*b1*Vf1 & P2*b2*Vf2
20. What is (m*g*z) capable of? → macroscopic potential energy
21. In a bolted joint under tensile load, which failure mode is checked first? → Tensile failure of the bolt shank
22. The LMTD method for heat exchanger analysis stands for: → Log Mean Temperature Difference
23. A first-order system reaches what percentage of its final value at exactly one time constant (τ)? → 63.2%
24. Which of the following, according to thermodynamics and fluid mechanics, describes the temperature at a fluid flow's stagnation point? → Stagnation temperature
25. Surface finish (roughness) on a drawing is indicated by: → A check mark symbol (√) with Ra value
26. The 'feature control frame' in GD&T contains, in order: → Symbol, tolerance value, datum reference(s)
27. What is the function of a retaining ring (snap ring) in a shaft assembly? → Prevent axial movement of a component
28. Which of the following corresponds to the Blake number standard symbol? → Bl
29. In first-angle projection (used outside the US), the front view is projected: → Onto the plane behind the object
30. What is the primary purpose of a feedback control system? → To compare the output with the desired value and reduce error