RCFL MT Mechanical Mock Test - 8 - Mechanical Engineering MCQ

Between A to C:

Mx = W × x ⇒ M_a = 0,M_c = W_a

Between C to D:

M_x = W × x − W(x−a) ⇒ M_D = W × 4a − W(4a−a) = W_a

Between D to B:

M_x = W × x − W(x−a) − W(x−4a) ⇒ M_B = W × 5a − W(5a−a) − W(5a−4a) = 0

From the lead screw, the motion is transmitted to the carriage by engaging the half nut with the lead screw.

The cutting tool moves with the lathe carriage by the engagement of a half nut with the lead screw.

Acme threads are used in lathe lead screws. This form of thread enables the easy engagement of the half nut.

P= Pitch

d= depth of thread

r= radius at crest and root

2πrσ = pπr²

p = 2σ/r

or

p = 4σ/d

So option A is correct.

Hence, the correct option is (C).

Within the elastic limit, the stress vs. strain curve of material follows Hooke’s Law.

Or, According to Hooke’s Law, whenever a material is loaded within the elastic limit,

Stress is directly proportional to strain.

Hooke’s Law, Stress ∝ Strain

i.e. σ ∝ ϵ or σ = E ϵ

where, σ = stress (N/m2)

ϵ = strain (m/m)

and E = Young’s Modulus of Elasticity (N/m²).

A simple manometer to measure gauge pressure

h_A = x + y; h_B = x

h_As_A = h_Bs_B

⇒ 0.20 × 13.6 = h_B × 0.8

⇒ h_B = 3.4 m

Correct Answer :- a

Explanation : Capillarity is the property of both cohesion and adhesion. But surface tension is due to cohesion only it does not involve adhesion. As cohesive force is higher than adhesion in mercury it does not wet the glass.

Stability of unconstrained Submerged Bodies in Fluid:

The equilibrium of a body submerged in a liquid requires that the weight of the body acting through its centre of gravity should be colinear with an equal hydrostatic lift acting through the centre of buoyancy.

- Stable Equilibrium: If the body returns to its original position by retaining the originally vertical axis as vertical

- Unstable Equilibrium: If the body does not return to its original position but moves further from it

- Neutral Equilibrium: If the body neither returns to its original position nor increases its displacement further, it will simply adopt its new position.

The relative position of the centre of gravity (G) and centre of buoyancy (B) of a body determines the stability of a submerged body.

Stable Equilibrium: B is above G

Free surface

A Submerged body in Stable Equilibrium

- Unstable Equilibrium: B is below G

The short circuit transfer mode is typically found in solid MIG or metal-cored wires when the ratio of Argon in the shielding gas is 75 to 85% Argon, and the welding voltage is low. In the globular transfer mode, the weld metal transfers across the arc in a gravity feed.

Tirade is a speech of criticism or denunciation, hence adoration is an antonym

As per the meanings given below, the correct idiom will be ‘playing devil’s advocate’.
Take a rain check: postpone a plan.
Rain on someone’s parade: to spoil a moment.
Play devil’s advocate: to argue, just for the sake of it.
Play by the ear: to improvise.
Correct Sentence:
He was not agreeing to back off, as if he was playing devil’s advocate.
Hence, the correct answer is option C. 

We can say that ,
The above given sentence is given in Passive Voice :-
Use structure “subject + auxiliary + past participle + by + object”
The glass was not broken by the boy.
Hence , required answer will be option A .

Protagonist means the leading character or one of the major characters in a play, film, novel, etc

Hence, Option C is correct.

(1 - 10)/(9 + (-3))

=-9/6 = -3/2

D : C = 80 : 100 = 4 : 5
C : B = (100 – 20) : (100) = 4 : 5
B : A = 300 : 100 = 3 : 1
A : B : C : D = 25 : 75 : 60 : 48

Hence, Option D is correct.

Given:

Number of work completed by Rita and Meena = 10 days

Number of work completed by Rita alone = 15 days

Formula used:

Work = Efficiency × Time

Calculation:

LCM of 10 and 15 is 30

Efficiency of Rita and Meena = (30/10) = 3 units/day

Efficiency of Rita = (30/15) = 2 units/day

Efficiency of Meena = [30/(3 – 2)] units/day

⇒ (30/1) unit/day

⇒ 30 days

∴ The required time to complete the work by Meena is 30 days

In the given coding system, we have:

So, the code for BOIL is 5, 31, 19, 25.
Hence, option D is correct.

From Statement I:
A is the sister of C, who is the daughter-in-law of M. M has only two children.
From, this statement, we can arrange the family tree as possible-

So, from this statement, we cannot determine the brother-in-law of A.
From Statement II:
O is the wife of M, who is the sibling of Q. B is the only male child of O.
From this statement, we can draw the family tree as follow:

So, from this statement, we cannot determine the brother-in-law of A.
From Statement I and Statement II together:
A is the sister of C, who is the daughter-in-law of M. M has only two children. O is the wife of M, who is the sibling of Q. B is the only male child of O.
From this statement, we can draw the family tree as follow:

So, from both statements, B is the brother-in-law of A.
Hence option D is correct.

The logic follows here is:

Middle number = square root of first number + third number.

Row-wise operation :

(25, 41, 36)

middle number = 41

= √25 + 36

= 5 + 36

= 41

(49, 45, 38)

middle number = 45

= √49 + 38

= 7 + 38

= 45

Similarly

(36, ?, 62)

middle number = ?

= √36 + 62

= 6 + 62

= 68

Hence, the correct answer is "68"

Additional Information

The most common pattern asked in exams are based on:

• It could be the sum of two numbers divided by a constant
• It could be the average of numbers.
• It could be in the form of alphabets, where alphabets are increased by constant or increased by the square of numbers or increased by prime numbers.
• It could be the difference of product of two diametrically opposite numbers.
• It could be the difference in the sum of adjacent numbers.
• The difference of the numbers could be in the patterns 13 ± 1, 23 ± 1,  and so on.
• The difference of the numbers could be in the patterns 12 ± 1, 22 ± 1, and so on.
• Numbers could be 12, 22, 32, and so on or 13, 23, 33, and so on.
• The difference could be prime numbers or the difference could be the square of prime numbers.
• The difference could be in the form of N2 ± N or N3 ± N.
• The difference could be in the form of ×N + N or ×2 + 1, ×2 + 2, ×2 + 3, and so on.
• The difference could be in the form of ×2 ± 1 alternatively.
• Numbers could be ×1, ×2, ×3, and so on. 

The correct answer is 'Bhai Veer Singh'.

Key Points

• Bhai Veer Singh is the founder of Modern Punjabi literature.
• He was an Indian poet, scholar, and theologian of the Sikh revival movement.
• He played an important part in the renewal of the Punjabi literary tradition.
• Bhai Veer Singh was one of the founders of the Punjab & Sind Bank.
• He was honored with the Sahitya Akademi Award in 1955 and the Padma Bhushan Award in 1956.

Additional Information

• ​Nanak Singh
  • ​Nanak Singh was an Indian poet, songwriter, and novelist of the Punjabi language.
  • His literary works in support of India's independence movement led the British to arrest him.
  • He published novels that won him literary acclaim.
• Professor Mohan Singh
  • ​Professor Mohan Singh was a noted Indian poet in the Punjabi language.
  • He was one of the early pioneers of modern Punjabi poetry.
• Amrita Pritam
  • Amrita Pritam was an Indian novelist, essayist, and poet, who wrote in Punjabi and Hindi.
  • A prominent figure in Punjabi literature, she is the recipient of the 1956 Sahitya Akademi Award.
  • She is considered the first eminent female Punjabi writer, novelist, and poet of the 20th century.
  • Her writing is equally loved by the people of India and Pakistan.