Online Mechanical Engineering Test - Mechanical Engineering Test - Random

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Total number of questions: 20.
Time allotted: 30 minutes.
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The above figure shows the two equal forces at right angles acting at a point. The value of force R acting along their bisector and in opposite direction is

P/2

[#]

If a given force (or a given system of forces) acting on a body __________ the position of the body, but keeps it in equilibrium, then its effect is to produce internal stress in the body.

change

does not change

[#]

When a particle moves along a straight path, there will be centripetal acceleration as well as tangential acceleration.

Correct

Incorrect

[#]

A machine having an efficiency greater than 50%, is known as

reversible machine

non-reversible machine

neither reversible nor non-reversible machine

ideal machine

[#]

The torsional rigidity of a shaft is expressed by the torque required to produce a twist of one radian per unit length of a shaft.

True

False

[#]

In a depressed nappe

the pressure below the nappe is atmospheric

the pressure below the nappe is negative

the pressure above the nappe is atmospheric

the pressure above the nappe is negative

[#]

Which of the following pump is sucessfully used for lifting water to the boilers?

Centrifugal pump

Reciprocating pump

Jet pump

Air-lift pump

[#]

The action of a centrifugal pump is that of a reversed reaction turbine.

Correct

Incorrect

[#]

A turbine develops 10000 kW under a head of 25 metres at 135 r.p.m. Its specific speed is

175.4 r.p.m.

215.5 r.p.m.

241.5 r.p.m.

275.4 r.p.m

[#]

10.

The specific heat at constant volume is

the amount of heat required to raise the temperature of unit mass of gas through one degree, at constant pressure

the amount of heat required to raise the temperature of unit mass of gas through one degree, at constant volume

the amount of heat required to raise the temperature of 1 kg of water through one degree

any one of the above

[#]

11.

The turbine blades do not change the direction of steam issuing from the nozzle.

True

False

[#]

12.

The absolute pressure of air at the outlet of a compressor is called

back pressure

critical pressure

discharge pressure

none of these

[#]

13.

The volume of air sucked by the compressor during its suction stroke is called

free air delivery

compressor capacity

swept volume

none of these

[#]

14.

The relative humidity decreases as air gets wet.

True

False

[#]

15.

The resistance to fatigue of a material is measured by

elastic limit

Young's modulus

ultimate tensile strength

endurance limit

[#]

16.

Screws jacks have multiple threads.

Agree

Disagree

[#]

17.

The cam follower generally used in automobile engines is

knife edge follower

flat faced follower

spherical faced follower

roller follower

[#]

18.

During hot working of metals

poor surface finish is produced

scale is formed on the metal surface

close tolerances can not be maintained

all of these

[#]

19.

Slow speed of the spindle is necessary in

thread cutting

turning a work of larger diameter

turning a hard or tough material

all of these

[#]

20.

The Klein's diagram is useful to find

displacement of various parts

velocity of various parts

acceleration of various parts

angular acceleration of various parts

[#]

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Online Mechanical Engineering Test - Mechanical Engineering Test - Random

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