Explore topic-wise MCQs in Mechanical Engineering Questions.

This section includes 53 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.

Which method is used for stability analysis?
A. Nyquisit criteria
B. Root locus method
C. Routh Hurwitz criteria
D. All of the above
Answer» E.
Discussion
2.

Heat in thermal system is analogous to __________ in electrical energy.
A. current
B. potential difference
C. resistance
D. charge
Answer» E.
Discussion
3.

Which of the following statements are true for block diagrams? 1. Block diagrams are the pictorial representation of the system 2. The complicated systems can be easily represented by connecting different blocks 3. Block diagram represents the relationship between input and output of the system
A. Statements (1) and (2)
B. Statements (2) and (3)
C. Statements (1) and (3)
D. Statements (1), (2) and (3)
Answer» E.
Discussion
4.

What is/are the maximum number of arrow/s (Input/s) allowed to go inside the block?
A. One
B. Two
C. Three
D. Four
Answer» B. Two
Discussion
5.

The PLC is used in _______.
A. machine tools
B. automated assembly equipment
C. moulding and extrusion machines
D. all of the above
Answer» E.
Discussion
6.

The displacement of a mass attached to a spring in mechanical system is corresponding to _______ in the electrical system
A. inductance
B. resistance
C. capacitance
D. current
Answer» E.
Discussion
7.

Which of the following is/are characteristic/s of mechatronic products and systems?
A. Functional interaction between mechanical, electronic and information technologies
B. Spacial interaction of subsystems in one physical unit
C. Intelligence related to the control functions of the mechatronics system
D. All of the above
Answer» E.
Discussion
8.

What is the formula for thermal capacitance?
A. (Change in heat stored) / (Change in heat transfer rate)
B. (Change in heat stored) / (Change in thermal resistance)
C. (Change in heat stored) / (Change in temperature)
D. Unpredictable
Answer» D. Unpredictable
Discussion
9.

Which of the following is/are the Continuous Control Mode/s used in control systems?
A. On-Off Control
B. Integral Control
C. Proportional Control
D. All of the above
Answer» E.
Discussion
10.

On-off Control is also called as ________.
A. one position control
B. two position control
C. four position control
D. half position control
Answer» C. four position control
Discussion
11.

The controller characteristics for on-off controller follow _________.
A. only one curve
B. two curves
C. four curves
D. unpredictable
Answer» C. four curves
Discussion
12.

When the output is bounded for bounded inputs, then the system is said to be_______.
A. stable
B. unstable
C. functional
D. nonfunctional
Answer» B. unstable
Discussion
13.

A corresponding block of an element is drawn by inserting ________ of that element inside the block.
A. the value of corresponding input
B. a transfer function
C. the value of corresponding output
D. the name
Answer» C. the value of corresponding output
Discussion
14.

The study of relationship between the input and output, when the input is invariant with respect to time is called as_____
A. static characteristics of instruments
B. dynamic characteristics of instruments
C. variable characteristics of instruments
D. none of the above
Answer» B. dynamic characteristics of instruments
Discussion
15.

The characteristic that provides an output with respect to the relation with the input is called as ___________
A. calibration of a system
B. response of a system
C. characteristic relation of a system
D. instrumentation of a system
Answer» C. characteristic relation of a system
Discussion
16.

Which of the following cannot be considered as data in Data Acquisition System (DAQ)?
A. Temperature
B. Mechanical displacement
C. Flow rate
D. None of the above
Answer» E.
Discussion
17.

________ is the curve plotted between input and output by giving known inputs to an instrument and obtaining corresponding outputs.
A. characteristic curve
B. accuracy curve
C. calibration curve
D. sensitivity curve
Answer» D. sensitivity curve
Discussion
18.

The task of time sharing, in which large number of data signals are sent through cables or buses, is performed by____
A. sensors or transducers
B. central processing unit (CPU)
C. multiplexer
D. analog to digital converter
Answer» D. analog to digital converter
Discussion
19.

What is the input of the data acquisition system (DAQ) to which a transducer is connected called?
A. control element
B. channel
C. interface
D. function
Answer» C. interface
Discussion
20.

The process of establishment of a relationship between the input to the instrument and output from the instrument is called as_____
A. static sensitivity
B. static characterization
C. static accuracy
D. static calibration
Answer» E.
Discussion
21.

Which module of data acquisition system (DAQ) consists of the CPU that controls the complete data acquisition system?
A. Input module
B. Output module
C. Sampling module
D. Control module
Answer» E.
Discussion
22.

Which of the following cannot be an input that is given to the PLC?
A. Manual switches
B. Relays
C. Sensors
D. None of the above
Answer» E.
Discussion
23.

Which of the following can be the output of PLC? 1. Relay coils 2. Solenoids 3. Indicators 4. Motors 5. Lamps 6. Alarms
A. Only (1), (2), (3) and (4)
B. Only (3), (4), (5) and (6)
C. Only (1), (2), (3) and (5)
D. All the (1), (2), (3), (4), (5), and (6)
Answer» E.
Discussion
24.

The capacity of data acquisition system (DAQ) can be specified in terms of______
A. number of control elements
B. number of channels
C. number of interfaces
D. number of functions
Answer» C. number of interfaces
Discussion
25.

Data acquisition of all the physical quantities in the real world is done in
A. the analog mode
B. the digital mode
C. either analog mode or digital mode
D. none of the above
Answer» B. the digital mode
Discussion
26.

According to Nyquist theorem, the sampling rate should be _________ as fast as the highest frequency of the signal being measured or sampled.
A. twice
B. thrice
C. ten times
D. hundred times
Answer» B. thrice
Discussion
27.

PLC can be ___________ in plant to change the sequence of operation.
A. only programmed
B. only reprogrammed
C. programmed and reprogrammed
D. able to give a set point
Answer» D. able to give a set point
Discussion
28.

Micro-controllers are ________________ than the PLCs.
A. bulky and expensive
B. bulky but cheaper
C. portable and cheaper
D. portable but expensive
Answer» D. portable but expensive
Discussion
29.

How is the noise immunity of PLCs to electrical noises as compared to that of conventional relay controllers?
A. poor
B. excellent
C. as good as noise immunity of conventional relay controllers
D. unpredictable
Answer» B. excellent
Discussion
30.

Digital to Analog Conversion is ______________ Analog to Digital Conversion.
A. less complex than
B. more complex than
C. as complex as
D. unpredictable
Answer» B. more complex than
Discussion
31.

In which system does the output not affect the process in any way?
A. Open loop system
B. Closed loop system
C. Both a. and b.
D. None of the above
Answer» B. Closed loop system
Discussion
32.

When ___________ contacts are actuated, they disrupt the power supply through them.
A. normally open type
B. normally closed type
C. both a. and b.
D. none of the above
Answer» C. both a. and b.
Discussion
33.

Shifting of set point and adjusting its new value by the controller, when the value of disturbance increases, is called as_______.
A. set-shift
B. offset
C. stabilization
D. none of the above
Answer» C. stabilization
Discussion
34.

If the frequency of the input signal to a system is increased, the amplitude of the output _______.
A. start reducing
B. start increasing
C. be remain constant
D. be unpredictable
Answer» B. start increasing
Discussion
35.

What is used to make considerable simplification in the devices such as watches and cameras etc. as compared to pure mechanical designs?
A. Actuators with electrical auxiliary energy
B. Amplifiers with electrical auxiliary energy
C. Both a. and b.
D. None of the above
Answer» D. None of the above
Discussion
36.

The phenomenon of storing heat energy in a system is called as thermal______.
A. conductance
B. resistance
C. capacitance
D. all of the above
Answer» D. all of the above
Discussion
37.

__________ of PLCs can be done in very little time.
A. Programming
B. Installation
C. Commissioning
D. All of the above
Answer» E.
Discussion
38.

The mechatronics is an interdisciplinary field in which the disciplines those act together are _________
A. Mechanical systems and Electronic systems
B. Mechanical systems and Information technology
C. Electronic systems and Information technology
D. Mechanical systems, Electronic systems and Information technology
Answer» E.
Discussion
39.

Which of the following functions can a control system carry out?
A. The system output can be controlled to some desired particular value for particular input
B. If certain conditions are satisfied, it can give a particular sequence of output, corresponding to given input
C. Either a. or b.
D. None of the above
Answer» D. None of the above
Discussion
40.

A group of components which can complete certain tasks or achieve certain desired results in a desired manner while working together is called as_____
A. output system
B. sequence system
C. control system
D. all of the above
Answer» D. all of the above
Discussion
41.

In which stage the measurement system comes in contact with the measurand or the quantity to be measured?
A. Transducer Stage
B. Signal Processor Stage
C. Output Stage
D. None of the above
Answer» B. Signal Processor Stage
Discussion
42.

The temperature control system which maintains the temperature of a room at 30 °C when it is set is an example of_____
A. Open loop system
B. Closed loop system
C. Both a. and b.
D. None of the above
Answer» C. Both a. and b.
Discussion
43.

Which control system does not have a stability problem?
A. Open loop system
B. Closed loop system
C. Both a. and b.
D. None of the above
Answer» B. Closed loop system
Discussion
44.

Data acquisition is the process in which, physical variables from the real world are_____
A. converted into electrical signals
B. modified and converted into a digital format for processing
C. both a. and b.
D. none of the above
Answer» D. none of the above
Discussion
45.

How is the speed of operation of conventional relay system as compared to digital controllers?
A. very slow
B. very fast
C. same
D. almost similar
Answer» B. very fast
Discussion
46.

What is the ratio of amplitude of response to that of the input called?
A. Response
B. Gain
C. Phase
D. Frequency
Answer» C. Phase
Discussion
47.

The capability of convention relay systems for complex operations is ___________ that of the PLCs .
A. poor than
B. excellent than
C. as good as
D. unpredictable as
Answer» B. excellent than
Discussion
48.

Which of the following is/are the drawback/s of proportional control? 1. Proportional control system is complicated and costly. 2. Proportional control system is not suitable for pressure temperature and flow control problems 3. If there are sudden disturbance, the proportional control system takes time to stabilize.
A. (1)
B. (2)
C. (3)
D. (1), (2) and (3)
Answer» D. (1), (2) and (3)
Discussion
49.

The type of memory which is fast and temporarily stores the data which are immediately required for use is called as______.
A. HDD
B. ROM
C. RAM
D. SSD
Answer» D. SSD
Discussion
50.

If the value of error increases, the changing speed of controller output __________.
A. increases
B. decreases
C. remains constant
D. cannot say
Answer» D. cannot say
Discussion