Explore topic-wise MCQs in Mechanical Engineering Questions.

This section includes 125 Mcqs, each offering curated multiple-choice questions to sharpen your Mechanical Engineering Questions knowledge and support exam preparation. Choose a topic below to get started.

1.

Overall magnification of optical comparators is given as
A. (4 d / f) x ( magnification of eye piece)
B. (2 f / d) x ( magnification of eye piece)
C. (4 f / d) x ( magnification of eye piece)
D. (2 d / f) x ( magnification of eye piece)
Answer» C. (4 f / d) x ( magnification of eye piece)
Discussion
2.

What is a loose running fit?
A. Loose running fit has minimum clearance
B. They can be used in textile machinery
C. Used in high precision task
D. All the above
Answer» C. Used in high precision task
Discussion
3.

Indicator method is used to test
A. straightness
B. squareness
C. flatness
D. all of the above
Answer» C. flatness
Discussion
4.

Which among the following is a type of clearance fit?
A. Force fit
B. Push fit
C. Slide fit
D. Tight fit
Answer» D. Tight fit
Discussion
5.

Which of the following components are inspected by a Tool maker's microscope?
A. gauges
B. screw threads
C. dies and fixtures
D. all of the above
Answer» E.
Discussion
6.

Which type of fringe is formed, if a path difference of λ/2 is observed in an interference pattern?
A. Dark fringe
B. Bright fringe
C. Both bright and dark fringe overlap
D. Unpredictable
Answer» B. Bright fringe
Discussion
7.

Which among the following causes first order surface irregularity?
A. Lack of straightness
B. Lack of rigidity
C. Feed and speed
D. Vibrations
Answer» B. Lack of rigidity
Discussion
8.

Which type of errors show linear relation between cumulative pitch error and length of thread?
A. Periodic errors
B. Progressive errors
C. Both a. and b.
D. None of the above
Answer» C. Both a. and b.
Discussion
9.

Which among the following is a type of direct measuring instrument of roughness?
A. Micro interferometer
B. Wallace surface dynamometer
C. Profilometer
D. None of the above
Answer» D. None of the above
Discussion
10.

Smooth motion in involute tooth profile is possible due to
A. variation in pressure angle
B. constant pressure angle
C. Both a. and b.
D. None of the above
Answer» C. Both a. and b.
Discussion
11.

What is used to measure the major diameter of an external thread?
A. Bench micrometer
B. Thread micrometer
C. One wire method
D. All of the above
Answer» B. Thread micrometer
Discussion
12.

An interferometer is used to measure a surface of 1.85 mm. Calculate number of fringes, when λ = 0.659 μm.
A. 5614.567
B. 5000.236
C. 2807.283
D. None of the above
Answer» B. 5000.236
Discussion
13.

Which of the following is not a type of direct measuring instrument?
A. micrometer
B. vernier caliper
C. divider
D. All of the above
Answer» D. All of the above
Discussion
14.

According to ISO 8402, quality is defined as
A. the totality of features and characteristics of a product or service that bears on its ability to satisfy given needs
B. the totality of features and characteristics of a product or service that bears on its ability to satisfy stated or implied needs
C. the minimum loss imparted by the product to satisfy from the time the product is dispatched
D. none of the above
Answer» C. the minimum loss imparted by the product to satisfy from the time the product is dispatched
Discussion
15.

Relaxed ambiance for group participation is observed in which type of brain storming sessions?
A. structured sessions
B. unstructured sessions
C. both a. and b.
D. none of the above
Answer» C. both a. and b.
Discussion
16.

Fish bone diagram is also known as?
A. Cause and effect chart
B. Ishikawa diagram
C. Both a. and b.
D. None of the above
Answer» D. None of the above
Discussion
17.

Which method is used to test the straightness of an object?
A. Indicator method
B. Interference method
C. Wedge method
D. All of the above
Answer» D. All of the above
Discussion
18.

Which of the following statements are true? 1. Mechanical comparators are compact and easy to handle 2. Parallax error is never observed in mechanical comparator 3. Sigma comparator is a type of mechanical comparator 4. Mechanical comparators have low inertia which makes them sensitive to vibrations
A. 1 and 2
B. 3 and 4
C. 1 and 3
D. All of the above
Answer» D. All of the above
Discussion
19.

Which of the following processes is used to monitor space signals of a space craft?
A. Stroboscope
B. Telemetry
C. Pyrometer
D. None of the above
Answer» C. Pyrometer
Discussion
20.

The study of scientific metrology deals with
A. accuracy and methods of measurement
B. standard specifications
C. theories related to nature
D. all of the above
Answer» D. all of the above
Discussion
21.

Johansson mickrocator is a type of
A. mechanical optical comparator
B. mechanical comparator
C. optical comparator
D. electrical comparator
Answer» C. optical comparator
Discussion
22.

According to laser Doppler principle, light experiences a change in its frequency when it comes in contact with a moving object depending upon
A. the velocity of the object
B. the direction of the object
C. both a. and b.
D. none of the above
Answer» D. none of the above
Discussion
23.

Which type of tooth profile has double curvature?
A. cycloidal tooth profile
B. involute tooth profile
C. both a. and b.
D. none of the above
Answer» B. involute tooth profile
Discussion
24.

According Juran's Triology, which of the following actions is performed under planning procedure?
A. choosing control subjects
B. organizing project teams
C. project establishment
D. deal with resistance to change
Answer» D. deal with resistance to change
Discussion
25.

Which of the following statements is/are false for Co-ordinate measuring machine?
A. Conventional comparators have greater accuracy than co-ordinate measuring machines
B. Gantry type of co-ordinate measuring machine use inductive transducers for measurement
C. Loading and unloading operations are easily done by cantilever type of co-ordinate measuring machine
D. All the statements are false
Answer» B. Gantry type of co-ordinate measuring machine use inductive transducers for measurement
Discussion
26.

Which award is presented to different organizations for quality and excellent performance by president of USA?
A. Malcolm Balbridge National Award
B. Dr. W. Edward Deming National Award
C. US Excellence Award
D. None of the above
Answer» B. Dr. W. Edward Deming National Award
Discussion
27.

What is the aim of fool proofing technique used for total quality management?
A. to achieve zero defects
B. to specify time schedules
C. to specify targets
D. none of the above
Answer» B. to specify time schedules
Discussion
28.

In a lot size of 10000, probability of acceptance is 0.483 for 0.4% defectives. The number of defectives are not replaced, assume np' = 1.36. Calculate % average outgoing quality
A. 1.123
B. 0.1932
C. 0.789
D. None of the above
Answer» C. 0.789
Discussion
29.

Which among the following is a type of control chart for variables?
A. C chart
B. P chart
C. X-bar chart
D. U chart
Answer» D. U chart
Discussion
30.

What are the factors causing sampling error?
A. method of sample selection
B. sample size
C. both a. and b.
D. none of the above
Answer» D. none of the above
Discussion
31.

The distribution of measured data can be studied by using
A. X-bar chart
B. R chart
C. both X-bar and R chart
D. None of the above
Answer» D. None of the above
Discussion
32.

What does allowance represent in clearance fits?
A. It represents minimum clearance and is positive
B. It represents maximum clearance and is positive
C. It represents minimum clearance and is negative
D. It represents maximum clearance and is negative
Answer» B. It represents maximum clearance and is positive
Discussion
33.

Which of the following causes is/are responsible for systematic errors?
A. non linearity
B. change in sensitivity
C. zero offset
D. All of the above
Answer» E.
Discussion
34.

Which thread has a combined strength of square thread and V thread?
A. Acme thread
B. Knuckle thread
C. Buttress thread
D. British standard Whitworth thread
Answer» D. British standard Whitworth thread
Discussion
35.

Universal measuring machine is a combination of
A. Tool maker's microscope and Parkinson's gear tester
B. Tool maker's microscope and optical measuring machine
C. Parkinson's gear tester and optical measuring machine
D. None of the above
Answer» C. Parkinson's gear tester and optical measuring machine
Discussion
36.

What does effective profile mean, while defining a surface texture?
A. Workpiece having repetitive irregularities
B. Roughness can be measured in this imaginary profile
C. Real contour of a surface
D. All of the above
Answer» D. All of the above
Discussion
37.

Spiral gears are used to transmit power when the shafts are
A. parallel
B. interesting
C. parallel and intersecting
D. neither parallel nor intersecting
Answer» E.
Discussion
38.

Which among the following machines can inspect geometric features of different components?
A. Co-ordinate measuring machines
B. Universal measuring machines
C. Both a. and b.
D. None of the above
Answer» C. Both a. and b.
Discussion
39.

Why are pitch errors observed in threads?
A. Lack of inspection
B. Incorrect ratio of tool work velocity
C. Interference between mating parts
D. All of the above
Answer» C. Interference between mating parts
Discussion
40.

Who among the following suggested seven quality tools for controlling quality?
A. Juran
B. Kaoru Ishikawa
C. Dr. W. Edward Deming
D. Feigenbaum
Answer» C. Dr. W. Edward Deming
Discussion
41.

What is a least square line?
A. A line which has sum of errors minimum
B. A line which has sum of difference of errors minimum
C. A line which has sum of squares of errors minimum
D. None of the above
Answer» D. None of the above
Discussion
42.

Which type of comparator changes its magnification, when distance between cross strip hinge and knife edge is varied?
A. Johansson mickrocator
B. Solex pneumatic comparator
C. Projector comparator
D. Sigma comparator
Answer» E.
Discussion
43.

Which among the following is an optical instrument?
A. angle dekkor
B. autocollimator
C. both a. and b.
D. none of the above
Answer» D. none of the above
Discussion
44.

Lot Tolerance Percent Defective is also known as?
A. rejectable quality level
B. acceptance quality level
C. indifferent quality level
D. all of the above
Answer» B. acceptance quality level
Discussion
45.

Which of the following gives actual measurement of any specific dimension?
A. Inspection by variables
B. Inspection by attributes
C. Both a. and b.
D. None of the above
Answer» B. Inspection by attributes
Discussion
46.

What is meant by Kaizen?
A. card signal
B. to avoid inadvertent errors
C. change for better quality
D. none of the above
Answer» D. none of the above
Discussion
47.

What is the effect of sample size on probability of acceptance?
A. sample size has no effect on probability of acceptance
B. as number of items in a sample decrease, higher is the possibility of number of defectives thereby probability of acceptance decreases
C. as number of items in a sample increase, higher is the possibility of number of defectives thereby probability of acceptance decreases
D. none of the above
Answer» D. none of the above
Discussion
48.

A surface of 2.1 mm is to be measured using a interferometer. Calculate nominal fraction for blue light which has wavelength of 0.785 μm.
A. 0.8280
B. 0.5350
C. 0.3185
D. 0.1910
Answer» D. 0.1910
Discussion
49.

Which of the following is a contact type of automated inspection method?
A. Inspection probe
B. Laser scanning
C. Electric field
D. All of the above
Answer» B. Laser scanning
Discussion
50.

Internal diameter of any workpiece can be measured using
A. Solex pneumatic comparator
B. Sigma comparator
C. Johansson mickrocator
D. All of the above
Answer» B. Sigma comparator
Discussion