RCFL MT Mechanical Mock Test - 2 - Mechanical Engineering MCQ

The isothermal process has a constant temperature so governed by Boyle’s law.

Since specific heat of water is very high, so less even amount of water takes more out of the radiator with a minimal increase in its temperature. Thus water is used as a coolant in the radiator of a car engine.

Flat-faced or mushroom follower: When the contacting end of the follower is a perfectly flat face, it is called a flat-faced follower.

Knife edge follower: When the contacting end of the follower has a sharp knife edge, it is called a knife-edge follower.

(a) Knife edged, (b) Roller Follower, (c) Flat or Mushroom Follower (d) Spherical faced Follower

Percentage of one phase = xz/xy × 100

Similarly, for another phase = xy/xy × 100

Bending moment is the algebraic sum of the moments about an x-section of all the forces acting on either side of the section.

Reynolds;Number = Inertia;force/Viscous;force

Froude;Number = Inertia;force/Gravity;force

Weber;Number = Inertia;force/Surface;tension;force

So a minimum of four links is necessary to form a kinematic chain.

An internal combustion engine (ICE) is a heat engine in which the combustion of a fuel occurs with an oxidizer (usually air) in a combustion chamber that is an integral part of the working fluid flow circuit.

The liquid used in manometers should have high density.To lower the column height, the manometers liquid must have a high density. Making the column height a reasonable limit is critical since manometers are used to measure high pressures.

The hardenability of steel depends upon the actual rate at which its austenite transforms to fine pearlite at the particular temperature at which this reaction sets in most promptly. The finer the grain, the more rapid the transformation is to fine pearlite, and correspondingly the lower is the hardenability.

If the radius of the addendum circle of the wheel increases beyond a limiting value, then the tip of a tooth on the wheel will cause interference with the tooth on the pinion and vice versa.

Interference may only be prevented if the addendum circles of the two mating gears cut the common tangent to the base circles between the points of tangency.

If the addendum for gear and pinion are to be equal, the addendum radius of the wheel decides whether the interference will occur or not. Because the addendum circle of the wheel passes through the limiting point on the line of action (interfering with the pinion) before the addendum circle of the pinion passes through the limiting point on the same line. So, in this case, the chances of interference are more for the wheel than the pinion. Here the tip of the wheel will undercut the flank of the pinion.

The resultant of non-concurrent force system is the one that will have the same rotational and translatory effect as the given system of forces. It may be a single force, a pure moment of a force and a moment.

When a body is acted upon by a number of coplanar non-concurrent forces. A little consideration will show that as a result of these forces, the body may have any one of the following states:

1. The body may move in any one direction.

2. The body may rotate about itself without moving.

3. The body may move in any one direction, and at the same time, it may also rotate about itself.

4. The body may be entirely at rest.

For Equilibrium of coplanar non-concurrent force system:

ΣF_x = 0

ΣF_y = 0

ΣM = 0

Advantages of Forging

• Mechanical properties and reliability of the materials increase due to the improvement in the crystal structure.

• Forging reduces the grain size of the metal, which increases strength and toughness.

• Fatigue and creep strength increases

• Improved physical property

Disadvantages of Forging

• Tooling cost in forging is more

• Poor dimensional accuracy and surface finish

• Forging operations are limited to simple shapes and have limitations for parts having undercuts, re‐entrant surfaces, etc.

According to the given context we are talking about the critics who always criticize people but they have not done the job themselves in life.

Back to square one: Returning to the place from where one started 

Close but no cigar: Being close to accomplishing a goal but only falling short at the end 

Crying wolf: Intentionally raising a false alarm 

Back seat drivers: People who criticize from the sidelines 

From all the given options, we can see that only option D fits in the given context since it expresses the correct meaning of the given statement.

This makes option D the correct choice among the given options.

The given sentence in active voice is: "Ads on TV increase the sale of any commodity."

The correct transformation of this sentence into the passive voice is: "The sale of any commodity is increased by ads on TV."

Therefore, the correct answer is option B: "The sale of any commodity is increased by ads on TV."

• Lament has two meanings out of which one is 'to complain'.
• Meaning of Complaint: a statement that something is unsatisfactory or unacceptable
• Meaning of Comment: a verbal or written remark expressing an opinion or reaction
• Meaning of Condone: accept (behaviour that is considered morally wrong or offensive)
• Meaning of Console: comfort (someone) at a time of grief or disappointment

Meaning of brief: of short duration; not lasting for long.

Additional Information:

• Meaning of Limited: small or controlled in number, amount, etc.
• Meaning of Small: not large in size, number, amount, etc.
• Meaning of Little: not big; small

When the signal happened distance left was 150 km.
150/(s) – 150/(s + 15) = 1/2 hours Æ s = 60.

Since pyramid has length ,width and height so it will be 3D

As chalk is used to write on the blackboard similarly the Ink is used to write on the paper.

The logic followed here is:

The place value of A is 1, D is 4, O is 15 and U is 21. 

In each of the given figure the alphabet and its place value are given except  U and 23 in figure D.

Hence, figure D is the odd one from the given figures.

Let's break down the information step by step and try to deduce the seating arrangement around the circular table.

1. G sits opposite to B.

   G and B are directly across from each other.

2. One person sits between A and C, who sits second to the right of H.

   This implies H is not sitting immediately beside A or C. C sits two places to the right of H.

3. Both G and B do not sit immediate left of H.

   G and B cannot be sitting next to H on the left.

4. D sits second to the left of B.

   The second left of B means there is one person between B and D.

5. A doesn’t sit beside D.

   A is not sitting next to D.

6. E doesn’t face C.

   E is not sitting opposite to C.

Let’s now start placing the people based on this information:

• G and B are opposite each other. Let's assume that B is at position 1 and G will be at position 5 (since they are opposite).
• D sits second to the left of B. If B is at position 1, the second left will be position 7. So, D is at position 7.
• C sits one person between A and C, and C is second to the right of H. Let’s place H at position 8, so C must be at position 3 (since C sits second to the right of H). A must then be at position 2.
• E is not facing C, and A doesn’t sit beside D, so E must be at position 6.
• This leaves F to be at position 4.

Now, let’s summarize the seating arrangement:

1. B
2. A
3. C
4. F
5. G
6. E
7. D
8. H

Now, the question asks: Who among the following sits 3rd to the left of the one who sits opposite to D?

• D is at position 7. The person opposite D is at position 3 (C).
• Now, let's find the person who sits 3rd to the left of C. Starting from position 3 (C), counting 3 places to the left: 1 (B), 2 (A), 3 (F). So, F sits 3rd to the left of C.

Thus, the correct answer is c) F.

The given series consists of consecutive prime numbers starting from 17. The next prime number after 29 is 31.

Thus, the missing number is 31.

Preparing the family tree using the following symbol:

According to the given information,

Hence, Q is the grandmother of S.

• The Indian Councils Act of 1892 aimed at expanding the councils to include more Indian representatives, albeit without significant power.
• The Partition of Bengal in 1905 was a major political move by Lord Curzon, the then Viceroy of India, which had significant implications for the nationalist movement.
• The Indian National Congress was indeed formed in 1885, marking a significant step towards organizing a national movement against British rule.