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Test: Theory of Machines - 1 - Mechanical Engineering MCQ


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24 Questions MCQ Test Mechanical Engineering SSC JE (Technical) - Test: Theory of Machines - 1

Test: Theory of Machines - 1 for Mechanical Engineering 2024 is part of Mechanical Engineering SSC JE (Technical) preparation. The Test: Theory of Machines - 1 questions and answers have been prepared according to the Mechanical Engineering exam syllabus.The Test: Theory of Machines - 1 MCQs are made for Mechanical Engineering 2024 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for Test: Theory of Machines - 1 below.
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Test: Theory of Machines - 1 - Question 1

Ball in socket joint is an example of

Detailed Solution for Test: Theory of Machines - 1 - Question 1

 The ball and socket joint is an example of spherical pair. When the two elements of a pair are connected in such a way that one element turns or swivels about the other fixed element, the pair formed is called a spherical pair.

Test: Theory of Machines - 1 - Question 2

If we replace a higher pair, the number of lower pair we will have to introduce is

Test: Theory of Machines - 1 - Question 3

These are 4 links joined together by a pin joint.The number of binary pairs is

Test: Theory of Machines - 1 - Question 4

Maximum degree of freedom of a 2D planner mechanism is,

Test: Theory of Machines - 1 - Question 5

Identify the given gear.

Detailed Solution for Test: Theory of Machines - 1 - Question 5

The given diagram is of a helical gear. In helical gears, the teeth are inclined to the axis of the gear. The gears can be either left handed or can be right handed depending on the direction in which the helix slopes when viewed. Here, 1 is left handed gear and 2 is a right handed gear.

Test: Theory of Machines - 1 - Question 6

Which of the following is grubler's equation.

Test: Theory of Machines - 1 - Question 7

The number of unique inversions of a 4 bar mechanics are

Detailed Solution for Test: Theory of Machines - 1 - Question 7

There are three inversions: 1) Beam Engine or Crank and lever mechanism. 2) Coupling rod of locomotive or double crank mechanism. 3) Watt's straight line mechanism or double lever mechanism.

Test: Theory of Machines - 1 - Question 8

Golden linkage is a

Test: Theory of Machines - 1 - Question 9

Beam engine is a practical example of

Test: Theory of Machines - 1 - Question 10

In a crank and slotted lever quick return motion mechanism length of slotted bar in 150 cm length of crank is 50 cm and length of connecting rod is 75 cm. The stroke length is

Test: Theory of Machines - 1 - Question 11

If number of links is 10. The number of I. centers

Test: Theory of Machines - 1 - Question 12

Axode mean

Test: Theory of Machines - 1 - Question 13

 The I-center of a sliding pair sliding at a concave upward surface lies at

Detailed Solution for Test: Theory of Machines - 1 - Question 13

The I-center, also known as the instantaneous center of rotation, is the point on a moving object that has zero velocity at any instant in time. In the case of a sliding pair, the I-center is the point on the fixed surface at which the relative velocity between the two sliding members is zero.

When the sliding pair is sliding at a concave upward surface, the I-center will be located just below the pair, where the surface is curving upward. This is because the velocity of the sliding members is zero at this point, as they are momentarily at rest before changing direction and sliding back down the surface.

Test: Theory of Machines - 1 - Question 14

Calculate the thrust in connecting rod, if piston effort is 200 kN and crank makes an angle of 45o from TDC. Assume obliquity ratio = 3.5

Test: Theory of Machines - 1 - Question 15

The acceleration respo nsible for change in direction in circular motion is

Test: Theory of Machines - 1 - Question 16

If velocity of slider is 4m/s and The angular velocity of the link where the slider is sliding is 5 rad/s the coriolis acceleration is

Test: Theory of Machines - 1 - Question 17

The direction of coriolis acceleration is

Test: Theory of Machines - 1 - Question 18

 If M.A = Mechanical Advantage, then for a machine

Test: Theory of Machines - 1 - Question 19

Which of the following is a positive drive

Detailed Solution for Test: Theory of Machines - 1 - Question 19

Positive drive means movement without slip such as the case in the linking between the crankshaft an the camshaft in the reciprocating engine. Negative drive, is an unusual term, allows slippage as with belt drive.

Gears are said to be 'POSITIVE DRIVE" because there is no slippage between the input and output.

Test: Theory of Machines - 1 - Question 20

Which of the gears has no axial thrust

Test: Theory of Machines - 1 - Question 21

The velocity ratio for mitre gears is

Test: Theory of Machines - 1 - Question 22

For a worm and worm wheel drive
1. worm has high spiral angle
2. worm wheel has high spiral angle
3. used for very high speed reduction
4. worm wheel is the driver
Which of the following is/are correct.

Detailed Solution for Test: Theory of Machines - 1 - Question 22

Correct Answer :- c

Explanation : The worm can be considered resembling a helical gear with a high helix angle. For extremely high helix angles, there is one continuous tooth or thread. For slightly smaller angles, there can be two, three or even more threads. 

The worm wheel is similar in appearance to a spur gear the worm gear is in the form of a screw generally with a flank angle of 20°.

Self-locking means it is not possible to drive the worm using the worm wheel, and this feature is used in such things as reversing prevention systems.

Test: Theory of Machines - 1 - Question 23

Which of the following is the most important circle of a gear.

Detailed Solution for Test: Theory of Machines - 1 - Question 23

Correct Answer :- C

Explanation : PITCH CIRCLE is the circle derived from a number of teeth and a specified diametral or circular pitch. Circle on which spacing or tooth profiles is established and from which the tooth proportions are constructed. PITCH CYLINDER is the cylinder of diameter equal to the pitch circle.

Test: Theory of Machines - 1 - Question 24

Diameter of a gear is 10cm and no of laths is 25.The module of the gear is

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