Online Mechanical Engineering Test - Mechanical Engineering Test - Random

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Total number of questions: 20.
Time allotted: 30 minutes.
Each question carries 1 mark; there are no negative marks.
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The load required to produce a unit deflection in a spring is called

flexural rigidity

torsional rigidity

spring stiffness

Young's modulus

[#]

The coefficient of discharge for an external mouthpiece depends upon

velocity of liquid

pressure of liquid

area of mouthpiece

length of mouthpiece

[#]

In a reaction turbine, the pressure head of water, while flowing over the vanes, is converted into kinetic head before leaving the wheel.

Agree

Disagree

[#]

The standard value of atmospheric pressure taken at sea level is

1.013 bar

760 mm of Hg

1013 x 10² N/m²

all of these

[#]

The general law for the expansion or compression of gases, is

pv = C

pv = m R T

pvⁿ = C

pv^γ = C

[#]

The high pressure and low pressure cylinders in a Tandem type compound engine are regarded as having cranks

180° to each other

90° to each other

0° to each other

none of these

[#]

The critical pressure gives the velocity of steam at the throat

equal to the velocity of sound

less than the velocity of sound

more than the velocity of sound

none of these

[#]

A nozzle is said to be a convergent nozzle

when the cross-section of the nozzle increases continuously from entrance to exit

when the cross-section of the nozzle decreases continuously from entrance to exit

when the cross-section of the nozzle first decreases from entrance to throat and then increases from its throat to exit

none of the above

[#]

In a convergent divergent nozzle, the discharge depends upon the initial conditions of steam and the area of nozzle at throat.

Correct

Incorrect

[#]

10.

A heat exchanger with heat transfer surface area A and overall heat transfer coefficient U handles two fluids of heat capacities C_max and C_min. The number of transfer units (NTU) used in the analysis of heat exchanger is specified as

AU C_min

[#]

11.

An evaporator is also known as

freezing coil

cooling coil

chilling coil

all of these

[#]

12.

A turn buckle is used to connect two round rods subjected to tensile loading and requiring subsequent adjustment for tightening or loosening.

Yes

[#]

13.

Hindalium is an alloy of aluminium and magnesium with a small quantity of chromium.

Agree

Disagree

[#]

14.

German silver contains

1% silver

2% silver

5% silver

no silver

[#]

15.

The stroke of a shaping machine is 250 mm. It makes 30 double strokes per minute. The overall average speed of operation is

3.75 m/min

5 m/min

7.5 m/min

15 m/min

[#]

16.

The crankshaft of a typical in-line four cylinder engine has __________ balance weights.

[#]

17.

The radial distance of a tooth from the pitch circle to the bottom of the tooth is called

dedendum

addendum

clearance

working depth

[#]

18.

The coriolis component of acceleration leads the sliding velocity by

45°

90°

135°

180°

[#]

19.

The example of completely constrained motion is a

motion of a piston in the cylinder of a steam engine

motion of a square bar in a square hole

motion of a shaft with collars at each end in a circular hole

all of the above

[#]

20.

The tractive force is maximum or minimum when the angle of inclination of crank with the line of stroke (θ) is equal to

0° and 90°

90° and 180°

135° and 315°

270° and 360°

[#]

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Online Mechanical Engineering Test - Mechanical Engineering Test - Random

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