Question 1

Kinetic friction is

Accepted Answer

A) That which occurs when there is no motion 
B) Less than maximum static friction 
C) Is equal to the static friction 
D) Is always more than peak static friction 
E) That occurs on dry surfaces only 
A) That which occurs when there is no motion 
B) Less than maximum static friction 
C) Is equal to the static friction 
D) Is always more than peak static friction 
E) That occurs on dry surfaces only B

Question 2

A gear box in an automobile utilises

Accepted Answer

A) Simple gear train 
B) Compound gear train 
C) Epicyclic gear train 
D) Compound-epicyclic gear train 
E) None of the above 
A) Simple gear train 
B) Compound gear train 
C) Epicyclic gear train 
D) Compound-epicyclic gear train 
E) None of the above B

Question 3

At critical speed

Accepted Answer

A) The shaforuns smoothly 
B) The shaft runs with noise due to vibrations 
C) The shaft becomes dynamically unstable with negligible lateral amplitudes 
D) The shaft becomes dynamically unstable with large lateral amplitudes 
E) None of the above 
A) The shaforuns smoothly 
B) The shaft runs with noise due to vibrations 
C) The shaft becomes dynamically unstable with negligible lateral amplitudes 
D) The shaft becomes dynamically unstable with large lateral amplitudes 
E) None of the above C

Question 4

In case of instantaneous centre of rotation

Accepted Answer

A) Only three rigid links have no linear velocities relative to each other 
B) Two rigid links rotate instantaneously relative to each other 
C) One rigid link has no linear velocity 
D) The two rigid links have no linear velocities relative to each other at the instantaneous centre 
E) None of the above 
A) Only three rigid links have no linear velocities relative to each other 
B) Two rigid links rotate instantaneously relative to each other 
C) One rigid link has no linear velocity 
D) The two rigid links have no linear velocities relative to each other at the instantaneous centre 
E) None of the above

Question 5

Which is the false statement about a governor?

Accepted Answer

A) Isochronism in govrnors is desirable when approximately one constant speeds is desired to be kept for all loads 
B) A very sensitive governor may not be very stable 
C) A sensitive governor cannot be isochronous 
D) Hunting in a governor may occur due to worn out guides of the sleeve 
E) A stable governor has a fixed position of balls for each speed within the working range 
A) Isochronism in govrnors is desirable when approximately one constant speeds is desired to be kept for all loads 
B) A very sensitive governor may not be very stable 
C) A sensitive governor cannot be isochronous 
D) Hunting in a governor may occur due to worn out guides of the sleeve 
E) A stable governor has a fixed position of balls for each speed within the working range

Question 6

When sunk key is to be used the key way is

Accepted Answer

A) Provided in shaft only 
B) 36 Hz 
C) Provided both in shaft and hub 
D) Keyway is not provided for a sunk key 
E) Provided in hub only 
A) Provided in shaft only 
B) 36 Hz 
C) Provided both in shaft and hub 
D) Keyway is not provided for a sunk key 
E) Provided in hub only

Question 7

For fluctuating loads, the appropriate bearing would be

Accepted Answer

A) Roller bearing 
B) Ball bearing 
C) Bush bearing 
D) Ball bearing with sleeve 
E) Needle roller bearing 
A) Roller bearing 
B) Ball bearing 
C) Bush bearing 
D) Ball bearing with sleeve 
E) Needle roller bearing

Question 8

Frequency of oscillation of a compound pendulum having the same distance between point of suspension and the centre of gravity of mass as a simple pendulum will be

Accepted Answer

A) Less 
B) Same 
C) More 
D) Depends on other parameters 
E) None of the above 
A) Less 
B) Same 
C) More 
D) Depends on other parameters 
E) None of the above

Question 9

A mechanism is an assembly of

Accepted Answer

A) two links 
B) three links 
C) only four links 
D) four or more than four links 
E) None of the above 
A) two links 
B) three links 
C) only four links 
D) four or more than four links 
E) None of the above

Question 10

The standard pressure angle is generally

Accepted Answer

A) 22° 
B) 10° 
C) 12° 
D) 14° 
E) 17° 
A) 22° 
B) 10° 
C) 12° 
D) 14° 
E) 17°

Question 11

In case of higher pairs

Accepted Answer

A) There is contact only at higher point of the two elements while in motion 
B) There is only line or point contact between the two elements while in motion 
C) There is only line or point contact between the two elements while in motion 
D) There is no contact between the two elements 
E) None of the above 
A) There is contact only at higher point of the two elements while in motion 
B) There is only line or point contact between the two elements while in motion 
C) There is only line or point contact between the two elements while in motion 
D) There is no contact between the two elements 
E) None of the above

Question 12

Dynamically unbalanced masses in rotating machines cause

Accepted Answer

A) Noise 
B) Friction 
C) Wear 
D) Vibrations 
E) All of the above 
A) Noise 
B) Friction 
C) Wear 
D) Vibrations 
E) All of the above

Question 13

In the coupling rod mechanism of a locomotive each of the four pairs is a

Accepted Answer

A) sliding pair 
B) Rolling pair 
C) screw pair 
D) Turning pair 
E) All of the above 
A) sliding pair 
B) Rolling pair 
C) screw pair 
D) Turning pair 
E) All of the above

Question 14

A stretched string of a guitar when operated is subjected to

Accepted Answer

A) Free vibrations 
B) Forced torsional vibrations 
C) Forced transverse vibrations 
D) Damped vibrations 
E) None of the above 
A) Free vibrations 
B) Forced torsional vibrations 
C) Forced transverse vibrations 
D) Damped vibrations 
E) None of the above

Question 15

A vibrometer

Accepted Answer

A) Indicates vibration frequency 
B) Only indicates second and above harmonics 
C) Indicates vibration amplitude 
D) Indicates nature of vibrations 
E) Indicates wave from vibrations 
A) Indicates vibration frequency 
B) Only indicates second and above harmonics 
C) Indicates vibration amplitude 
D) Indicates nature of vibrations 
E) Indicates wave from vibrations

Question 16

The pitch circle of a cam is

Accepted Answer

A) The smallest circle drawn to the pitch curve from the centre of rotation of curve 
B) The smallest circle drawn to the cam profile from the centre of rotation of a radial cam 
C) The circle fitting in cam profile 
D) The circle with centre as the centre of cam axis and radius such that it passes through the pitch point 
E) None of the above 
A) The smallest circle drawn to the pitch curve from the centre of rotation of curve 
B) The smallest circle drawn to the cam profile from the centre of rotation of a radial cam 
C) The circle fitting in cam profile 
D) The circle with centre as the centre of cam axis and radius such that it passes through the pitch point 
E) None of the above

Question 17

In case of belt drives, the effect of centrifugal tension is

Accepted Answer

A) To reduce the driving power 
B) To increase the driving power 
C) Not appreciable on driving power 
D) Dependent on other factors 
E) None of the above 
A) To reduce the driving power 
B) To increase the driving power 
C) Not appreciable on driving power 
D) Dependent on other factors 
E) None of the above

Question 18

Coriolis component of acceleration will exist only if

Accepted Answer

A) There are two coincidental points 
B) Two coincident points have relative angular velocity of sliding 
C) Two coincidental points have linear relative velocity of sliding accompanied by the rotation about fixed centres 
D) The two coincidental points must have same centre of rotation 
E) None of the above 
A) There are two coincidental points 
B) Two coincident points have relative angular velocity of sliding 
C) Two coincidental points have linear relative velocity of sliding accompanied by the rotation about fixed centres 
D) The two coincidental points must have same centre of rotation 
E) None of the above

Question 19

Which of the following are not standard forms for spur-gears?

Accepted Answer

A) 14 
B) 14. 
C) 20°full depth involute system 
D) 20° stub-tooth involute system 
E) All above 
A) 14 
B) 14. 
C) 20°full depth involute system 
D) 20° stub-tooth involute system 
E) All above

Question 20

In a car, transmission losses will be minimum in

Accepted Answer

A) First gear 
B) Direct gear 
C) Second gear 
D) Sperm 
E) Third gear 
A) First gear 
B) Direct gear 
C) Second gear 
D) Sperm 
E) Third gear

Kinetic friction is

A gear box in an automobile utilises

At critical speed

In case of instantaneous centre of rotation

Which is the false statement about a governor?

When sunk key is to be used the key way is

For fluctuating loads, the appropriate bearing would be

Frequency of oscillation of a compound pendulum having the same distance between point of suspension and the centre of gravity of mass as a simple pendulum will be

A mechanism is an assembly of

The standard pressure angle is generally

In case of higher pairs

Dynamically unbalanced masses in rotating machines cause

In the coupling rod mechanism of a locomotive each of the four pairs is a

A stretched string of a guitar when operated is subjected to

A vibrometer

The pitch circle of a cam is

In case of belt drives, the effect of centrifugal tension is

Coriolis component of acceleration will exist only if

Which of the following are not standard forms for spur-gears?

In a car, transmission losses will be minimum in

Mechanical Engineering Concepts

Mechanical Engineering Shafts, Belts, Gears, and Governors

Mechanical Engineering: Balancing, Cam Profiles, Dynamometers, Pulleys, Gears

Mechanical Engineering: Speed Ratios, Gears, Vibrations, Governors

Mechanical Engineering: V-Belts, Gears, Chains

Mechanisms and Kinematics: Gears, Belts, and Linkages

Mechanical Engineering: Cam Size, Transmission Losses, Kleins Construction

Mechanical Engineering Gears, Mechanisms, and Drives

Mechanical Engineering: Gears, Linkages

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Exam 7: Mechanical Engineering: Higher Pairs, Kinematic Chains, Vibrating Bodies

Kinetic friction is

A gear box in an automobile utilises

At critical speed

In case of instantaneous centre of rotation

Which is the false statement about a governor?

When sunk key is to be used the key way is

For fluctuating loads, the appropriate bearing would be

Frequency of oscillation of a compound pendulum having the same distance between point of suspension and the centre of gravity of mass as a simple pendulum will be

A mechanism is an assembly of

The standard pressure angle is generally

In case of higher pairs

Dynamically unbalanced masses in rotating machines cause

In the coupling rod mechanism of a locomotive each of the four pairs is a

A stretched string of a guitar when operated is subjected to

A vibrometer

The pitch circle of a cam is

In case of belt drives, the effect of centrifugal tension is

Coriolis component of acceleration will exist only if

Which of the following are not standard forms for spur-gears?

In a car, transmission losses will be minimum in

Mechanical Engineering Concepts

Mechanical Engineering Shafts, Belts, Gears, and Governors

Mechanical Engineering: Balancing, Cam Profiles, Dynamometers, Pulleys, Gears

Mechanical Engineering: Speed Ratios, Gears, Vibrations, Governors

Mechanical Engineering: V-Belts, Gears, Chains

Mechanisms and Kinematics: Gears, Belts, and Linkages

Mechanical Engineering: Cam Size, Transmission Losses, Kleins Construction

Mechanical Engineering Gears, Mechanisms, and Drives

Mechanical Engineering: Gears, Linkages

Filters