Mechanical Engineering Quiz # 4

What is the term for the horizontal portion of a chimney draft system extending from combustion equipment?

Breeching

Tailpipe

Flatpipe

Sideways run

What is the SI unit for thermal resistance?

Kelvins per ohm

Ohms

joules per Kelvin

Kelvins per Watt

What is the static head pressure of a column of water 2 ft high?

2 psi

.433 psi

.866 psi

.216 psi

For a machine resting on four legs, how do you describe the leg not carrying equal weight to the other three?

The free leg

The light-weighted foot

The soft foot

The light leg

What type of loading is applied to a coil spring in compression?

Tension

Torsion

Bending

Compression

What is the function of unloaders in a reciprocating compressors design?

To prevent motor overload

To relieve excess pressure

To unload all cylinders

To decrease the compressor capacity

Which of these is NOT a type of truss?

Thomas truss

Pratt truss

Bowstring truss

King post

Which of these is a method for visualizing and analyzing fluid flow?

Particle image velocimetry

computational fluid dynamics

particle kinematics

What are the axes in Mohr's circle diagram?

X - axis : Normal Stress, Y - axis : Normal Strain

X - axis : Tensile Stress, Y - axis : Shear Stress

X - axis : Normal Stress, Y - axis : Shear Stress

X - axis : Stress, Y - axis : Strain

Which among the following is also known as croning process in which cast parts are produced with dimensional tolerances as low as ±0.2 millimeters.

Centrifugal casting

Investment casting

Slush casting

Shell casting

Calculate the moment of a 20 newtons force at 10 meters perpendicular distance from the point about which the moment is required.

200 newton meters

100 newton meters

150 newton meters

250 newton meters

Which of the following devices is used for atomizing and vaporizing the fuel before mixing it with air in varying proportions?

Q = W + E

Q = W – E

Q = W / E

Q = W x E

Which branch of engineering mechanics deals with the force which acts upon bodies at rest?

Statics

Dynamics

Kinetics

Kinematics

Calculate the centrifugal force for a body moving in a circular path, given that the mass of the body is 10 kilogram, its angular velocity is 10 radians per second and the radius of the circular path is 10 meters.

30000 newtons

10000 newtons

20000 newtons

15000 newtons

Which among the following is the correct range of value for the included angle of a V-belt?

10º to 20º

30º to 40º

70º to 80º

100º to 120º

Which among the following is a spring controlled governor?

Watt governor

Porter governor

Hartnell governor

Which plant layout is known as 'functional layout' or 'analytical layout'?

Process layout

Product layout

Fixed position layout

Which among the following types of chips is usually produced during the machining of brittle materials?

Discontinuous chips

Continuous chips with no built up edges

Continuous chips with built up edges

According to the Boyle's law:

pressure is directly proportional to volume.

pressure is inversely proportional to volume.

temperature is directly proportional to volume.

temperature is inversely proportional to volume.

Calculate the specific heat of a gas at constant volume, given that the mass of the gas is 100 kilograms, the initial temperature of the gas is 20 kelvins and the final
temperature of the gas is 50 kelvins. The total heat supplied to the gas is 105 kilojoules.

30 joules per kg per kelvin

35 joules per kg per kelvin

40 joules per kg per kelvin

45 joules per kg per kelvin

The compression ratio of a diesel engine is:

10 to 15

15 to 25

40 to 50

50 to 60

The petrol engine works on ___________.

Rankine cycle

Otto cycle

Diesel cycle

In which, among the following systems, does no heat or work cross its boundary?

Closed system

Isolated system

Open system

A couple of two bodies produces which type of motion?

Rotational motion

Translatory motion

Rotational and translatory motion

Up to which point in a stress-strain curve is Hooke's law applicable?

Yield point

Elastic limit

Plastic limit

Breaking point

A solar collector receiving solar radiation at the rate of 0.6 kW/m2 transforms it into the internal energy of a fluid at an overall efficiency of 50%. The fluid heated to 350 K is used to run a heat engine which rejects heat at 313 K. If the heat engine is to deliver 2.5 kW power, the minimum area (in sq. meters) of the solar collector required would be:

8.33

16.66

39.68

79.36

In which type of welding is a mixture of Iron oxide and Aluminum used?

Metal inert gas welding

Tungsten inert gas welding

Submerged arc welding

Thermit welding

Stud arc welding

The forces which meet at one point but whose lines of action lie on different points are known as ______________.

Co-planar concurrent forces

Co-planar non-concurrent forces

Non co-planar concurrent forces

Non co-planar non-concurrent forces

Calculate the value of crippling load of a specimen, given that the crushing stress is 160 newtons per square meter, cross sectional area is 80 square millimeters, Rankine

7000

6400

8000

8500

How many revolutions of crankshaft does it take to complete one working cycle in a four stroke engine?

2

4

6

8

Quiz:	Mechanical Engineering Quiz # 4
Subject:	Basic Mechanical Engineering
Total Questions:	1465 MCQs
Time:	1465 Minutes