RCFL MT Mechanical Mock Test - 1 - Mechanical Engineering MCQ

If a liquid (pure substance) is heated at constant pressure, the temperature at which it boils is called saturation temperature. This temperature will remain constant during heating until all the liquid boils off. At this temperature, the liquid and the associated vapour at the same temperature are in equilibrium and are called saturated liquid and vapour, respectively. The saturation temperature of a pure substance is a function of pressure only. At atmospheric pressure, the saturation temperature is called the normal boiling point. Similarly, if the vapour of a pure substance is cooled at constant pressure, the temperature at which the condensation starts is called dew point temperature.

Similarly, when a solid is heated at constant pressure, it melts at a definite temperature called the melting point.

And W = Q_H - QC

Q_C = Q_H - W = 600 - 150 = 450kcal

Correct Answer :- A

Explanation : In an adiabatic process, the system is insulated from the surroundings and heat absorbed or released is zero. For an adiabatic process of an ideal gas,

pvγ = c is an adiabatic process.

Lathes are the principal machine tool used in turning. Milling operations are operations where the cutting tool rotates to bring cutting edges to bear against the workpiece. Milling machines are the principal machine tool used in milling.

40W will glow brighter than 100W. You will get a higher resistance value for the low-rated bulb. Since bulbs are connected in series and the current in series remains the same, brightness will be directly proportional to (I²)×R. Hence bulb of a lower rating will be more brighter for the series connection.

The failure or yielding occurs when the strain energy per unit volume in a strained material reaches the limiting strain energy (or strain energy at the yield point) per unit volume as determined from a simple tension test.

Young's Modulus = Stress/Strain, Since a perfectly rigid body, won't yield any strain, irrespective of the amount of stress, and it’s Young's modulus is infinite.

A pitot tube, also known as a pitot probe, is a flow measurement device used to measure fluid flow velocity. It is widely used to determine the airspeed of an aircraft, the water speed of a boat, and to measure liquid, air, and gas flow velocities in certain industrial applications.

Everything has mass, and thus, everything that moves must have momentum because its mass in motion! Now, if momentum is "mass in motion,” then what's inertia?

Inertia is the RESISTANCE an object has a quality of an object to keep that object at rest if it is at rest and to keep it moving in uniform motion if it is moving in uniform motion.

Let us first learn the meanings of the given words:

Cruise (noun): a voyage on a ship or boat taken for pleasure or as a holiday and usually calling in at several places.

Expedition (noun): a journey undertaken by a group of people with a particular purpose, especially that of exploration, research, or war.

Outing (noun): a short journey made by a group of people, usually for pleasure or education.

The idea here is to express the next trip of the astronauts, as the context is about ‘astronauts’, thus ‘expedition’ is the correct answer while ‘cruise’ and ‘outing’ are contextually weak.

Hence, the correct answer is option A.

As we can say that ,
Tangible means available physically, concretely, elusive is something that eludes, i.e, is difficult to catch, touch or understand, palpable is a synonym to tangible.
Hence , Elusive is antonym word of Tangible . 

Total income of the year = 5 × 21,000 + 4 × 24,000 + 3 × 12,000 + 1,80,000 = 4,17,000

Hence, Option B is correct.

Factorise the terms
5 × √5 × 3×√5 = 5×3×5 =75

(2√3 +√3) = 3√3       ( By addition of like terms )

So option C is correct answer. 

The quantity that a container holds is called its "capacity" or "volume."

Hence option C is correct.

The logic follows here is:

Now,

Karan is 17 years old, has a weight of 47 kgs, and a height of 161 cms.

It is clearly mentioned in the criteria of Physical in Sub-inspector and Army recruitment about the weight and height of the candidate. Karan has a weight of 47 kgs and a height of 161 cms which is less than the criteria set for both the recruitment. Therefore, Karan neither qualifies for Physical in Sub-inspector and Army recruitment.

Hence, the correct answer is "Neither Sub-inspector nor Army recruitment".

Q, R, S, T, U, and V are seated in a straight line facing North.

i) S is second to the right of T.

ii) T is second to the right of Q.

iii) R is to the immediate left of Q

iv) R is to the immediate left of Q and is second to the left of V.

Thus we can see R and S is sitting at the extreme ends.

Hence, the correct answer is "RS".

The description is as follows:

Hence, ‘COW’ is the odd one out.

The synonym of arid, parched and droughty is dry.