Mechanical Engineering MCQs

Mechanical Engineering MCQs

Answer these 200+ Mechanical Engineering MCQs and assess your grip on the subject of Mechanical Engineering.
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1: What aspect of machine virabtion is described in cycles per second?

A.   Regularity

B.   Consistency

C.   Continuity

D.   Frequency

2: Creep is the tendency of a solid to:

A.   deform permanently under mechanical stress

B.   undergo elastic deformation

C.   fracture under extreme loads

D.   deform due to electromagnetic forces

A.   Boiler heat production

B.   Boiler horsepower

C.   Burner heat potential

D.   Burner heat product

4: Which fan configuration is designed to add energy to airflow passing straight through the fan blades?

A.   Centrifugal fan configuration

B.   Axial fan configuration

C.   High velocity fan configuration

D.   Vortex fan configuration

5: What must happen to fuel oil at the burner for efficient combustion?

A.   Desintigration

B.   Oxygen depletion

C.   Atomization

D.   Conical spraying

6: What is the term for the ability of a material to withstand the force of being pulled apart?

A.   Tensile strength

B.   Shear strength

C.   Elasticity

D.   Flexibility

7: What is a term for heat transfer between two objects in contact, driven by a constant temperature difference?

A.   convection

B.   steady state conduction

C.   constant diffusion

D.   advection

8: The reduction in effectiveness of a vehicular brake is called:

A.   smooth-out

B.   drag

C.   brake fade

D.   force fade

9: Which of these processes involves melting the workpieces?

A.   soldering

B.   brazing

C.   welding

10: What is the lowest stress that produces a permanent deformation in a material?

A.   strain threshhold

B.   fatigue

C.   fracture threshold

D.   Yield strength

11: Which machine tool rotates the workpiece on its axis?

A.   drill

B.   milling machine

C.   lathe

12: Which fieldlines are instantaneously tangent to the velocity vector of flow?

A.   timelines

B.   streaklines

C.   streamlines

D.   pathlines

13: What describes the effect of a material expanding in the directions perpendicular to its direction of compression?

A.   Poisson Effect

B.   Bellowing effect

C.   Newton effect

D.   Accordion effect

14: What is the density of water?

A.   500 kg/m^3

B.   4000 kg/m^3

C.   1 kg/m^3

D.   1000 kg/m^3

15: What is an upward force exerted by a fluid that opposes the weight of an immersed object?

A.   buoyancy

B.   capillary action

C.   surface tension

16: Why are fan assemblies usually designed with spring isolators?

A.   To increase airflow

B.   To eliminate noise

C.   To minimize vibration

D.   To reduce friction

17: True or False: Vapour compression used in most household refrigerators is a non-cyclic process.

A.   True

B.   False

18: How is the heat energy that changes the state of an object but not its temperature described?

A.   Superheat

B.   Latent heat

C.   Sensible heat

D.   Thermal heat

19: What does ASME stand for?

A.   Association for Service of Mechanical Equipment

B.   American Standards for Mechanical Equipment

C.   American Society of Mechanical Engineers

D.   Association of Science and Materials Engineering

20: What is the rotational force exerted by a spinning shaft?

A.   Radial velocity

B.   Momentum

C.   Inertia

D.   Torque

21: Which device is used to store rotational energy?

A.   generator

B.   flywheel

C.   motor

22: Which if these is NOT a component of aerodynamic force?

A.   pinch

B.   drag

C.   thrust

D.   lift

23: What is the measure of a fluid's resistance to gradual deformation by shear stress or tensile stress?

A.   viscosity

B.   fluidity

C.   buoyancy

D.   fluid tension

24: What are the units for Reynold's number?

A.   m^3/s

B.   kg/m^3

C.   no dimensions

D.   Pascal second

25: What is defined as the ratio of tensile stress to tensile strain?

A.   shear modulus

B.   Pascal's ratio

C.   bulk modulus

D.   Young's modulus

26: Which value must be calculated into piping system designs?

A.   Expansion denominator

B.   Expansion derivative

C.   Expansion estimate

D.   Expansion coefficient

27: What is the result of continous cyclic loads on a metal object?

A.   Increased pliability

B.   Hardened metal

C.   Metal fatigue

D.   Softened metal

28: The set of equations used to describe motion?

A.   Kinesetic

B.   Newtonian

C.   Motive

D.   Kinematic

29: True or False: Silicon can be used to make microelectromechanical systems.

A.   True

B.   False

30: True or False: A perfect Carnot heat engine cannot be built in reality.

A.   False

B.   True

31: Newton's law of cooling states that the rate of heat loss of a body is proportional to:

A.   the absolute temperature of the body

B.   the absolute temperature of the surrounding

C.   the difference in temperatures between the body and its surroundings

32: Which of these manufacturing processes involves pouring liquid metal into a mould?

A.   casting

B.   forging

C.   forming

D.   welding

33: Total mechanical energy is the sum of what two forms of energy?

A.   Kinetic Energy and Potential Energy

B.   Used energy and unused energy

C.   Mechanical energy and electrical energy

D.   Static energy and dynamic energy

34: True or False: All matter with a temperature greater than absolute zero emits thermal radiation.

A.   True

B.   False

35: How do we describe the property of an object or material which will restore it to its original shape after distortion?

A.   Strength

B.   Elasticity

C.   Rigidity

D.   Flexibility

36: What are the three basic methods of heat tranfser?

A.   Thermal, Osmosis and Linear

B.   Steam, Flame and Hydronic

C.   Tactile, Friction, and Combustion

D.   Conduction, Convection and Radiation

A.   Moving parts

B.   Actives

C.   Dynamics

D.   Statics

38: What is a tool used for stamping metal by a press?

A.   clamp

B.   jig

C.   mould

D.   die

39: What is one advantage of multi-stage centrifugal pump configurations over single-stage centrifugal pump configurations?

A.   Higher pressures can be derived

B.   Lower pressures can be derived

C.   Lower volumes can be derived

D.   Higher volume can be derived

40: Which of these is a turbine for hydro power?

A.   Carnot wheel

B.   Ericsson wheel

C.   Pelton wheel

41: Which type of gear meshing should be employed to transmit torque to a linear force?

A.   Rack and Pinion

B.   Epicyclic gear

C.   Helical gear

D.   Bevel gear

42: How many degrees of freedom does a rigid body have in three dimensional space?

A.   six

B.   one

C.   four

D.   three

43: Which mechanism can convert rotational motion to reciprocating motion?

A.   spring

B.   gear train

C.   pendulum

D.   slider-crank

44: What is the simple mechanics description of a force acting upon an object to cause a displacement of the object?

A.   Movement

B.   Work

C.   Action

D.   Motion

45: Which stress acts in parallell with the cross section of a material?

A.   shear

B.   compression

C.   normal

D.   tension

46: What is the unit of measurement defined as "the amount of heat needed to raise 1 pound of water 1 degree"?

A.   Farenheit

B.   Watt

C.   BTU

D.   Ampere

47: What is constant in an isochoric process?

A.   temperature

B.   pressure

C.   volume

48: Which of these factors least affects the heat dissipation by a heat sink?

A.   surface area exposed to air

B.   material of heat sink

C.   mechanical pressure on heat sink

49: Which term is used to describe the angle of the cutting face relative to the cutting work?

A.   Slice angle

B.   Strike angle

C.   Leverage angle

D.   Rake angle

50: What type of deformation may take place when large amounts of tensile strain are localized in a small area of a material?

A.   Crinkling

B.   Smashing

C.   Necking

D.   Crunching