Machine Design MCQs

Machine Design MCQs

Answer these 500+ Machine Design MCQs and assess your grip on the subject of Machine Design.
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1: In second type of levers,

A.   Effort is in between the fulcrum and load

B.   Load is in between the fulcrum and effort

C.   None of these

D.   Fulcrum is in between the load and effort

2: All stresses produced in a belt are

A.   Both tensile and compressive stresses

B.   Compressive stresses

C.   Shear stresses

D.   Tensile stresses

3: Slenderness ratio is the ratio of

A.   Effective length of column to width of column

B.   Width of column to depth of column

C.   Effective length of column to least radius of gyration of the column

D.   Maximum size of column to minimum size of column

4: According to Indian standards, the diameter of rivet hole is made larger than the basic size of rivet by

A.   2 mm for rivet diameter from 39 mm to 48 mm

B.   0.5 mm upto rivet diameter of 24 mm

C.   1 mm for rivet diameter from 27 mm to 36 mm

D.   All of these

5: Circumferential joint in boilers is used to get the required length of a boiler.

A.   False

B.   True

6: A screw is said to be over hauling screw, if its efficiency is

A.   None of these

B.   Equal to 50%

C.   Less than 50%

D.   More than 50%

7: In a hydrodynamic lubricated bearing

A.   There is a thin film of lubricant between the journal and the bearing

B.   There is no lubricant between the journal and the bearing

C.   There is a thick film of lubricant between the journal and the bearing

D.   The lubricant is forced between the journal and the bearing, by external pressure

8: A transmission shaft includes

A.   Line shaft

B.   Over head shaft

C.   All of these

D.   Counter shaft

9: Which of the following statement is correct for gears?

A.   The addendum is less than dedendum

B.   The pitch circle is always greater than the base circle

C.   All of these

D.   The pitch circle diameter is equal to the product of module and number of teeth

10: Lewis equation in gears is used to find the

A.   Shear stress

B.   Fatigue stress

C.   Compressive stress in bending

D.   Tensile stress in bending

11: A crankshaft is a __________ shaft.

A.   Transmission

B.   Machine

12: The resistance to fatigue of a material is measured by

A.   Endurance limit

B.   Ultimate tensile strength

C.   Elastic limit

D.   Young's modulus

13: In order to avoid tearing of the plate at an edge, the distance from the centre line of the rivet hole to the nearest edge of the plate should be equal to (where d = Diameter of rivet hole)

A.   2 d

B.   D

C.   2.5 d

D.   1.5 D

14: The property of a material which enables it to be drawn into wires with the application of a tensile force, is called

A.   Ductility

B.   Malleability

C.   Elasticity

D.   Plasticity

15: An open belt drive is used when

A.   Shafts are arranged parallel and rotate in the same directions

B.   Shafts are arranged parallel and rotate in the opposite directions

C.   Driven shaft is to be started or stopped whenever desired without interferring with the driving shaft

D.   Shafts are arranged at right angles and rotate in one definite direction

16: The value of stress concentration factor depends upon

A.   None of these

B.   Material of the part

C.   Geometry of the part

D.   Material and geometry of the part

17: Screws used for power transmission should have

A.   Low efficiency

B.   Strong teeth

C.   High efficiency

D.   Very fine threads

18: The cam follower extensively used in air-craft engines is

A.   Flat faced follower

B.   Roller follower

C.   Spherical faced follower

D.   Knife edge follower

19: When bevel gears connect two shafts whose axes intersect at an angle greater than a right angle and one of the bevel gears has a pitch angle of 90°, then they are known as

A.   Internal bevel gears

B.   Mitre gears

C.   Crown bevel gears

D.   Angular bevel gears

20: The number of rivets in shear shall be equal to the number of rivets in crushing.

A.   Incorrect

B.   Correct

21: What is the process by which resources are converted?

A.   Production process

B.   Engineering design process

C.   Manufacturing process

D.   Purchasing process

22: What is the purpose of the engineering design process?

A.   To produce a product that meets customer needs

B.   To produce a design that is technically feasible

C.   To produce designs that are feasible and meet the requirements of the project

D.   To produce plans by which resources are converted, preferably optimally with due consideration for environment

E.   To produce a design that meets the needs of the client

23: What discipline is encompassed by the term mechanical design?

A.   Civil engineering

B.   Process engineering, manufacturing engineering, materials science

C.   Aerospace engineering

D.   All disciplines of mechanical engineering, thermal and fluid sciences, solid mechanics, materials and processes, manufacturing sciences

E.   CAD/CAE, FEA, materials science

24: What is the use of scientific principles and technical information to define a machine?

A.   To create a reliable and efficient machine

B.   To improve the quality of the manufactured products

C.   Control system design

D.   Mechanical design process

E.   Fabrication process

25: The use of scientific principles and information along with what is used to define a machine, mechanical device or system?

A.   Innovations, ingenuity, or imagination

B.   Designs or blueprints

C.   Science

D.   Mathematics

E.   The physical laws that govern how things move

26: What is used in the definition of the Mechanical Design Process?

A.   Client needs and preferences

B.   Business strategy

C.   Scientific principles and technical information

D.   Prototypes

E.   Human Resources policies

27: What is another word for "moving images"?

A.   Photograph

B.   Animation

C.   Painting

28: What type of software is used to create animation?

A.   Adobe Photoshop

B.   Photoshop

C.   Illustrator

D.   Animation software

E.   3D CAD

29: What is used in ergonomics?

A.   Psychometrics

B.   Ergonomic principles

C.   Equipment

D.   Ergonomics methods

E.   Anthropometrics

A.   Assembly

B.   System

C.   Circuit

D.   Network

31: What is the term for the later phases of a design process?

A.   Middleware

B.   Implementation

C.   Backend

D.   Frontend

32: What does close to manufacturing refer to?

A.   A system in which products are made

B.   The final stages of product manufacturing

C.   The production of a product

D.   The companies that make products in close proximity to the consumer

E.   The later phases of a design process

33: A clearance in a mechanism is commonly referred to as what term?

A.   Check

B.   Backlash

C.   Take-up

D.   Clearance

34: What can cause a clearance in a mechanism?

A.   Damaged parts

B.   Worn parts

C.   Gaps between the parts

D.   Defective parts

E.   Improper lubrication

35: What can be felt before a system reverses?

A.   Heat

B.   Pressure

C.   Clearances

D.   Noise

36: What does a BOM include?

A.   The date the parts were produced

B.   Part ID numbers and corresponding drawing numbers

C.   Bill of materials

D.   Parts list

E.   The quantity of each part

37: What is a table containing?

A.   A spreadsheet of the components required

B.   Record of the test data

C.   List of the custom-made and off-the-shelf components

D.   Chart of the test data

E.   A diagram of the components and their corresponding wiring

38: In general, what term describes something that sticks up on a part?

A.   Mushroom

B.   Boss

C.   Spike

D.   Horn

39: What is a boss in 3D CAD?

A.   Base

B.   Added material

C.   Orientation

D.   Order

E.   Object

40: What is a boss in general used to describe?

A.   A person in charge

B.   A person who gives you orders

C.   Something that sticks up on a part

D.   A person in a position of authority

E.   A person who makes decisions

41: What long, multi-tooth tool has successively deeper cuts?

A.   Broach

B.   File

C.   Chisel

D.   Drill

E.   Saw

42: What is a broach used to machine?

A.   Bolt

B.   Joining two pieces of metal

C.   Cutting tool

D.   Internal and external surfaces

E.   Nail

43: What kind of teeth does an example of the Broach have?

A.   Carnivore

B.   Multi-tooth

C.   Canine

D.   Incisor

E.   Human

44: What is the term for using a computer to help in creation, modification, analysis, or optimization of a design in 2D or 3D?

A.   Computer Graphics

B.   Computer Aided Drafting

C.   Computer Aided Design

D.   Computer Aided Manufacturing

E.   CAD Computer Aided Design

45: What is another term for CAD?

A.   CAE


C.   Computer-based design

D.   Computer aided design

E.   CAM

46: Over what process does CAM take over when it's finished?

A.   3D Printing

B.   FEA

C.   Laser

D.   CAD

E.   CAM drawing

47: When using CAM, a company may use software and what else?

A.   Maintenance manuals

B.   Manual tools

C.   Equipment used to produce products

D.   Project management

E.   Computer-controlled machinery

48: When does CAM Computer Aided Manufacturing replace CAD?

A.   When it becomes obsolete

B.   When CAD becomes a fraction of the cost

C.   When accuracy is required

D.   When a product needs to be designed quickly

E.   When the phase of the latter is over

49: What is the term for the use of software and computer-controlled machinery to automate a manufacturing process?

A.   Computer Numerical Control

B.   Computer-Aided Design

C.   Robotics

D.   CAM Computer Aided Manufacturing

E.   Computer Aided Manufacturing

50: The process of casting involves pouring a liquid mix into a mold, followed by what?

A.   Cooling down the mold and the material

B.   Pressing the material into the mold

C.   Pouring a hot liquid mix into the mold

D.   Removing the mold

E.   Removing the finished product from the mold