Practice Test: Mechanical Engineering (ME)- 12 - Mechanical Engineering MCQ

Two pipes A and B can fill a tank in 36 min and 45 min respectively. A waste pipe C can empty the tank in 30 min. If all the pipes are opened together then the tank will be full in how much time?

Direction: In each question, a sentence with four words printed in bold are given. These are numbered as (1), (2), and (3). One of these four words printed in bold may be either wrongly spelt or inappropriate in the context of the sentence. Find out the word, if any, which is wrongly spelt or inappropriate. The number of that word is the answer. If all the words printed in bold are correctly spelt and appropriate in the context of the sentence, mark (4), i.e., 'All correct' as the answer.

No incidence of violence (1)/ occurred during the protests (2)/ against the Government’s (3)/ All correct (4)

In the following question, select the related word pair from the given alternatives.

? : Sun :: Rain : ?

72% of the students of a certain class took Biology and 44% took Mathematics. If each student took at least one of Biology or Mathematics and 40 students took both of these subjects, the total number of students in the class is?

Study the following paragraph and answer the given questions.

Fashion has become one of the largest fads among the youth. The amount of time wastage and expenditure on fashion is very large. What bothes however is the fact that fashion is here to stay despite countless arguments against it. What is required therefore is that strong efforts should be made in order to displace excessive craze of fashion from the minds of today's youth.

Which of the following statements finds least support by the argument made by the author in the given paragraph?

Direction: Find out the number of students who play only cricket.

Note : Total number of students - (25 +22) = 47

If the uncle of the father of Rani is the grandson of the father of Anup and Anup is the only son of his father, then what is the relation of Anup with Rani?

A copper rod 400mm long is pulled in tension to a length of 401.2 mm by applying a tensile stress of 330 MPa. Then Young’s modulus of copper is

Find optimum order quantity where annual demand is 400 and ordering cost is 250 per order Carrying cost per unit 2%.

Consider the following statements:

P: Casting yield is kept minimum while designing a gating system.

Q: Gating ratio of 4:1:1 corresponds to a pressurised gating system.

R: Possibility of air aspiration effect is more in unpressurised gating system

S: Pressurised gating system can only be used for non ferrous castings

Which of above statements are correct?

The general solution of the differential equation with C₁ and C₂ as constants are:

A square bar with tapered length having circular cross section area having diameter 10 cm and 20 cm at two ends and length of the bar is 80 cm is subjected to a tensile force of 50 KN. If the bar is made up of steel having modulus of elasticity 200GPa, Find the elongation of the tapered bar (in mm) _______.

A stone is dropped from a balloon going up with a uniform velocity of 10 m/s. if the balloon was 40 m high when the stone was dropped, the height of balloon from the ground when the stone hits the ground is (take g = 10 m/s²)

A banner hoarding having dimensions 2m × 2m is kept vertical by a 5m long pillar. Air blowing at 5 m/s is striking directly to the banner. If the maximum moment the pillar can withstand is 100 Nm. To reduce the drag force holes need to be cut out from the hoarding with a punch of 10 cm diameter. If the air drag coefficient is 0.5, then the total number of holes need to be cut out are

An double slider chain mechanism with the slotted link of length 5 units FIXED. A point on the link traces a curve which has a slope dy/dx = -2√3 eat the point (√3/2,1). Find the equation of the curve.

A slender bar of 100 mm² cross-section is subjected to loading as shown in the figure. If the modulus of elasticity is taken as 200 × 10⁹ Pa, then the elongation produced in the bar will be ____ mm.

The resultant of two vectors when acting at right angles is 10kN. If they act at 600 their resultant is 5√6 kN. Find the magnitude of individual vectors.

Two coins are tossed once, where E :no tail appears, F : no head appears. Find P(E/F).

For a beam simply supported at ends, carrying UDL, the ratio of maximum principal stress at extreme fibre to maximum principal stress at neutral axis is___. The beam is square and length is 10 times the side of square.

A body is said to be provided optimum amount of streamlining when ______.

At a production machine, parts arrive according to a Poisson process at the rate of 0.35 parts per minute. Processing time for parts have exponential distribution with mean of 2 min. What is the probability that a random part arrival finds that there are already 8 parts in the system (in machine + in queue)?

A Circular beam, 50 mm in diameter, is welded to the support by means of circumferential fillet weld as shown in the diagram. It is subjected to a eccentric load of 20kN at a distance of 100mm parallel to support and at distance of 200mm away from the support. Thickness of the weld is 10mm. Find Maximum principal stress at weld on X-X plane.

The turbine rotor of a ship has a mass of 5000 kg and its radius of gyration is 500 mm. The turbine rotor rotates at 1500 rpm in counter-clockwise direction (view from stern or rear end). If the ship travels at a speed of 90 km/h and steer to the left in a curve of 100 m then the gyroscopic couple on the ship and its effect respectively are

Consider following statements:

I) A gas is said to be an ideal gas when intermolecular forces are zero.

II) A gas behaves as an ideal gas under high temperature and high pressure.

III For an ideal gas, the temperature variation w. r. t. pressure during throttling condition is zero.

IV) A gas cools during expansion only when the Joule Thomson coefficient is negative.

Which of the following statements is/are correct?

Two castings of the same metal have the same surface area. One castings is in the form of a sphere and the other is a cube. What is the ratio of the solidification time for the sphere to that of the cube?

The uniform rod in figure weighs 400 N, length of the rod is 12 m

Determine the angle ɵ in degrees.

The system of equations x - 4y + 7z = 12 , 3x + 8y - 2z = 10, 26 z - 8y = 6