Question 1

The number of instantaneous centres for a four bar chain mechanism would be

Accepted Answer

A) 4 
B) 6 
C) 5 
D) 3 
E) 2 
A) 4 
B) 6 
C) 5 
D) 3 
E) 2 B

Question 2

In locomotives the unbalanced part of the primary disturbing force due to reciprocating masses, cause

Accepted Answer

A) Variation of tractive effect 
B) Periodical vibrations 
C) Lifting of locomotive 
D) Oscillation in vertical planes 
E) Hammer blow 
A) Variation of tractive effect 
B) Periodical vibrations 
C) Lifting of locomotive 
D) Oscillation in vertical planes 
E) Hammer blow A

Question 3

By using large thread angles in a lifting machine

Accepted Answer

A) The mechanical advantage will be low 
B) The mechanical advantage will be high 
C) The load will be sustained in absence of effort 
D) The load will be easily lifted 
E) While unloading, little effort will be required 
A) The mechanical advantage will be low 
B) The mechanical advantage will be high 
C) The load will be sustained in absence of effort 
D) The load will be easily lifted 
E) While unloading, little effort will be required A

Question 4

Which of the following is a dead weight governor?

Accepted Answer

A) Porter governer 
B) Hartness governer 
C) Watt governor 
D) None of the above 
E) None of the above 
A) Porter governer 
B) Hartness governer 
C) Watt governor 
D) None of the above 
E) None of the above

Question 5

The mechanism used in a petrol engine is

Accepted Answer

A) Crank mechanism 
B) Slider mechanism 
C) Slider crank mechanism 
D) Natural line and circular mechanism 
E) None of the above 
A) Crank mechanism 
B) Slider mechanism 
C) Slider crank mechanism 
D) Natural line and circular mechanism 
E) None of the above

Question 6

A cam profile is the

Accepted Answer

A) Actual working contour of the cam 
B) Profile of path traced by a cam follower 
C) Total surface area of the cam 
D) Path which the cam follower traces 
E) The profile of the path to be traced by the mechanism driven by follower 
A) Actual working contour of the cam 
B) Profile of path traced by a cam follower 
C) Total surface area of the cam 
D) Path which the cam follower traces 
E) The profile of the path to be traced by the mechanism driven by follower

Question 7

Coriolis component is not involved in

Accepted Answer

A) Andreau variable stroke engine mechanism 
B) Slider crank mechanism 
C) Line sliding in a swivelling pin 
D) Quick return mechanism 
E) Tangent cam acceleration 
A) Andreau variable stroke engine mechanism 
B) Slider crank mechanism 
C) Line sliding in a swivelling pin 
D) Quick return mechanism 
E) Tangent cam acceleration

Question 8

Timing belt

Accepted Answer

A) Have no slip 
B) Have maximum slip during starting 
C) Slip in proportion to the time of operation 
D) Are used to determine the life time of a belt 
E) None of the above 
A) Have no slip 
B) Have maximum slip during starting 
C) Slip in proportion to the time of operation 
D) Are used to determine the life time of a belt 
E) None of the above

Question 9

In order to balance the reciprocating masses, the conditions to be satisfied are

Accepted Answer

A) Primary forces must balance 
B) All above conditions must be satisfied 
C) Secondary couples must balance 
D) Primary couples must balance 
E) Secondary forces must balance 
A) Primary forces must balance 
B) All above conditions must be satisfied 
C) Secondary couples must balance 
D) Primary couples must balance 
E) Secondary forces must balance

Question 10

The efficiency in case of worm gear drives is generally in the range

Accepted Answer

A) 70-85 percent 
B) 50-70 percent 
C) 10-25 percent 
D) 25-40 percent 
E) 40 - 60 percent 
A) 70-85 percent 
B) 50-70 percent 
C) 10-25 percent 
D) 25-40 percent 
E) 40 - 60 percent

Question 11

In the Crossby engine indicator which one of the following mechanism is used?

Accepted Answer

A) Slider-crank mechanism 
B) Scotch yoke mechanism 
C) Scotch yoke mechanism 
D) Modified pantograph mechanism 
E) None of the above 
A) Slider-crank mechanism 
B) Scotch yoke mechanism 
C) Scotch yoke mechanism 
D) Modified pantograph mechanism 
E) None of the above

Question 12

The number of nodes in a shaft carrying three rotors will be

Accepted Answer

A) Three 
B) Zero 
C) Four 
D) Two 
E) One 
A) Three 
B) Zero 
C) Four 
D) Two 
E) One

Question 13

In case of locomotives, the effect of hammer blow is counteracted by

Accepted Answer

A) Flanges of the tyres of the wheels 
B) Balancing weights 
C) Inside section of the rails 
D) Dead weight of the engine 
E) All of the above 
A) Flanges of the tyres of the wheels 
B) Balancing weights 
C) Inside section of the rails 
D) Dead weight of the engine 
E) All of the above

Question 14

A 0.5 kg weight attached to a light spring elogates it 7.87 mm. The natural frequency of the system would be in the range

Accepted Answer

A) 100-175 cpm 
B) 300-350 cpm 
C) 175-290 cpm 
D) 25-50 cpm 
E) 50-100 cpm 
A) 100-175 cpm 
B) 300-350 cpm 
C) 175-290 cpm 
D) 25-50 cpm 
E) 50-100 cpm

Question 15

Which of the following instruments may be used in vibration measurements?

Accepted Answer

A) Photometer 
B) Accelerometer 
C) Dynamometer 
D) Balometer 
E) None of the above 
A) Photometer 
B) Accelerometer 
C) Dynamometer 
D) Balometer 
E) None of the above

Question 16

The secondary critical speed of a shaft occurs at

Accepted Answer

A) Twice the primary critical speed 
B) Occurs only when there are more than 2 rotors on a shaft 
C) Four times the primary critical speed 
D) If the externam exciting system has a frequency other than the primary critical speed 
E) Half the primary critical speed 
A) Twice the primary critical speed 
B) Occurs only when there are more than 2 rotors on a shaft 
C) Four times the primary critical speed 
D) If the externam exciting system has a frequency other than the primary critical speed 
E) Half the primary critical speed

Question 17

Two shafts have their axes not in the same straight line. Also their axes are not parallel but intersecting. Which of the following coupling can be used for these shafts?

Accepted Answer

A) Flexible coupling 
B) Universal coupling 
C) Oldham's coupling 
D) Rigid coupling 
E) Any of the above 
A) Flexible coupling 
B) Universal coupling 
C) Oldham's coupling 
D) Rigid coupling 
E) Any of the above

Question 18

Contact ratio of gear should be

Accepted Answer

A) One 
B) More than one 
C) Less than one 
D) Not defined 
E) None of the above 
A) One 
B) More than one 
C) Less than one 
D) Not defined 
E) None of the above

Question 19

The 'crowning' of flat pulleys is generally done pulley

Accepted Answer

A) To reduce belt friction 
B) To prevent belt joining from damaging the belt surface 
C) To prevent the belt from running off the pulley 
D) In case of cross belt drives only 
E) None of the above 
A) To reduce belt friction 
B) To prevent belt joining from damaging the belt surface 
C) To prevent the belt from running off the pulley 
D) In case of cross belt drives only 
E) None of the above

Question 20

Which dynamometer will be most suitable for measuring the BHP of an automobile engine?

Accepted Answer

A) Electrical generator type 
B) Rope brake type 
C) Prony brake 
D) Electrical resistance type 
E) Hydraulic 
A) Electrical generator type 
B) Rope brake type 
C) Prony brake 
D) Electrical resistance type 
E) Hydraulic

The number of instantaneous centres for a four bar chain mechanism would be

In locomotives the unbalanced part of the primary disturbing force due to reciprocating masses, cause

By using large thread angles in a lifting machine

Which of the following is a dead weight governor?

The mechanism used in a petrol engine is

A cam profile is the

Coriolis component is not involved in

Timing belt

In order to balance the reciprocating masses, the conditions to be satisfied are

The efficiency in case of worm gear drives is generally in the range

In the Crossby engine indicator which one of the following mechanism is used?

The number of nodes in a shaft carrying three rotors will be

In case of locomotives, the effect of hammer blow is counteracted by

A 0.5 kg weight attached to a light spring elogates it 7.87 mm. The natural frequency of the system would be in the range

Which of the following instruments may be used in vibration measurements?

The secondary critical speed of a shaft occurs at

Two shafts have their axes not in the same straight line. Also their axes are not parallel but intersecting. Which of the following coupling can be used for these shafts?

Contact ratio of gear should be

The 'crowning' of flat pulleys is generally done pulley

Which dynamometer will be most suitable for measuring the BHP of an automobile engine?

Mechanical Engineering Concepts

Mechanical Engineering Shafts, Belts, Gears, and Governors

Mechanical Engineering: Speed Ratios, Gears, Vibrations, Governors

Mechanical Engineering: V-Belts, Gears, Chains

Mechanisms and Kinematics: Gears, Belts, and Linkages

Mechanical Engineering: Higher Pairs, Kinematic Chains, Vibrating Bodies

Mechanical Engineering: Cam Size, Transmission Losses, Kleins Construction

Mechanical Engineering Gears, Mechanisms, and Drives

Mechanical Engineering: Gears, Linkages

Filters

Exam 3: Mechanical Engineering: Balancing, Cam Profiles, Dynamometers, Pulleys, Gears

The number of instantaneous centres for a four bar chain mechanism would be

In locomotives the unbalanced part of the primary disturbing force due to reciprocating masses, cause

By using large thread angles in a lifting machine

Which of the following is a dead weight governor?

The mechanism used in a petrol engine is

A cam profile is the

Coriolis component is not involved in

Timing belt

In order to balance the reciprocating masses, the conditions to be satisfied are

The efficiency in case of worm gear drives is generally in the range

In the Crossby engine indicator which one of the following mechanism is used?

The number of nodes in a shaft carrying three rotors will be

In case of locomotives, the effect of hammer blow is counteracted by

A 0.5 kg weight attached to a light spring elogates it 7.87 mm. The natural frequency of the system would be in the range

Which of the following instruments may be used in vibration measurements?

The secondary critical speed of a shaft occurs at

Two shafts have their axes not in the same straight line. Also their axes are not parallel but intersecting. Which of the following coupling can be used for these shafts?

Contact ratio of gear should be

The 'crowning' of flat pulleys is generally done pulley

Which dynamometer will be most suitable for measuring the BHP of an automobile engine?

Mechanical Engineering Concepts

Mechanical Engineering Shafts, Belts, Gears, and Governors

Mechanical Engineering: Speed Ratios, Gears, Vibrations, Governors

Mechanical Engineering: V-Belts, Gears, Chains

Mechanisms and Kinematics: Gears, Belts, and Linkages

Mechanical Engineering: Higher Pairs, Kinematic Chains, Vibrating Bodies

Mechanical Engineering: Cam Size, Transmission Losses, Kleins Construction

Mechanical Engineering Gears, Mechanisms, and Drives

Mechanical Engineering: Gears, Linkages

Filters