RCFL MT Mechanical Mock Test - 8 - Mechanical Engineering MCQ

Therefore for completing the one thermodynamic cycle (power cycle), the piston has to complete two strokes only those are one upward and downward movement. Thus the crankshaft completes only one revolution during the completion of the power cycle.

Process 1-2: Isentropic compression

Process 2-3: Constant volume heat addition

Process 3-4: Isentropic expansion

Process 4-1: Constant volume heat rejection.

Diesel cycle is a gas power cycle widely used in diesel engines. The diesel cycle is also known as a constant pressure cycle as heat is supplied at constant pressure.

In the Carnot cycle, heat is supplied and rejected at constant temperature expansion and compression, respectively.

Octane number is the percentage of isooctane in the mixture of iso-octane and n-heptane. The octane number is for gasoline (petrol) fuel. Gasoline with an octane number of 80 means 80% of isooctane and 20% of n-heptane, i.e., the branched-chain alkane is more, so knocking is less.

2πrσ = pπr²

p = 2σ/r

or

p = 4σ/d

So option A is correct.

- Intensive Property does not depend on the amount of matter; Example: Pressure, temperature

- Extensive property depends on the amount of matter. Example: Mass, Volume, Energy, etc.

- Intensive properties are independent of the mass in the system, while extensive properties are related to the mass; If the mass is increased, the value of the extensive properties also increases.

- Specific extensive properties i.e., specific volume, specific energy, etc. are intensive properties i.e., independent of the mass

Hence, the correct option is (C).

Note: For laminar flow between two fixed parallel plates

u_avg = 2u_max/3

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

The equilibrium of a body submerged in a liquid requires that the weight of the body acting through its centre of gravity should be collinear 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

• Unstable Equilibrium: B is below G

• Neutral Equilibrium: B coincides with G

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

The word Hasten (Verb) means : hurry; to say or do something without delay.
The word Dawdle (Verb) means : to take a long time to do something or go somewhere. 

The given sentence is in Active voice. Note that the tense of the verb in the given sentence should not be changed while changing the voice of the sentence.

As we can say that ,
Tractable is something that can be managed easily, i.e., manageable.
From above it is clear that Unmanageable is opposite word of Tractable . 

The words ‘fiasco’ and ‘naive’ are contextually incorrect and thereby can be eliminated.
Both the words ‘charm’ and ‘glamour’ can be used to depict that beauty of Taj Mahal always fascinates people and seek their attention.
Fiasco: failure
Charm: attractiveness
Naive: beginner
Glamour: beauty
Hence, option B is the correct answer. 

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

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

There are five such 5's as shown below

3 5 9 5 4 5 5 3 5 8 4 5 6 7 3 5 7 5 5 4 5 2 3 5 1 0

∴ STOLL → $2@33
Hence, option B is correct.

The Venn diagram that best represents the relationship between Crockery, Plate, and Bowl is shown below:

Bowl and Plate are name of Crockery items.

Hence, ‘option 3’ is the correct answer.

After Balban's death in 1287, Delhi's kotwal Malik al-Umara Fakhruddin enthroned Balban's teenage grandson Muiz ud din Qaiqabad (or Kayqubad) with the title Muizzuddin. Qaiqabad was a weak ruler, and the administration was actually run by his officer Malik Nizamuddin. After Nizamuddin was poisoned by some rival officers, Qaiqabad summoned Jalal-ud-din from Samana to Delhi, gave him the title "Shaista Khan", appointed him as the ariz-i-mumalik, and made him the governor of Baran.

By this time, Qaiqabad's health had deteriorated, and two rival factions of nobles vied for the power in Delhi. One faction, led by Malik Aytemur Surkha, sought to maintain the power of the old Turkic nobility, and wanted to retain Balban's family on the throne. The other faction, led by Jalal-ud-din, supported the rise of the new nobility