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 angle which the normal reaction makes with the resultant reaction is called angle of friction.

Agree

Disagree

[#]

For a beam, as shown in the below figure, when the load W is applied in the centre of the beam, the maximum deflection is

[#]

The siphon will work satisfactorily, if the minimum pressure in the pipe is __________ vapour pressure of liquid.

equal to

less than

more than

[#]

A flow through a long pipe at decreasing rate is called __________ uniform flow.

steady

unsteady

[#]

The efficiency of Diesel cycle depends upon

temperature limits

pressure ratio

compression ratio

cut-off ratio and compression ratio

[#]

The ratio of root mean square velocity to average velocity of gas molecules at a particular temperature is

0.086

1.086

3.086

4.086

[#]

A device used to put off fire in the furnace of the boiler when the level of water in the boiler falls to an unsafe limit, is called

blow off cock

stop valve

superheater

none of these

[#]

A fission chain reaction in uranium can be developed

by increasing the contents of U₂₃₅

by slowing down fast neutrons so that U₂₃₅ fission continues by slow neutron

both (a) and (b)

none of these

[#]

The minimum temperature to which water can be cooled in a cooling tower is

dew point temperature of air

wet bulb temperature of air

dry bulb temperature of air

ambient air temperature

[#]

10.

In a domestic vapour compression refrigerator, the refrigerant commonly used is

CO₂

Ammonia

R-12

all of these

[#]

11.

In block brakes, the ratio of shoe width to wheel diameter is taken between

0.1 and 0.25

0.25 and 0.50

0.50 and 0.75

0.75 and 1

[#]

12.

If b denotes the face width and L denotes the cone distance for a bevel gear, then the bevel factor is written as

b/L

b/2 L

1 - 2 b.L

1 - b/L

[#]

13.

The dowels are

wooden nails

box nails

wire nails

none of these

[#]

14.

The silicon carbide abrasive is chiefly used for grinding

cemented carbide

ceramic

cast iron

all of these

[#]

15.

The purpose of jigs and fixtures is to

increase machining accuracy

facilitate interchangeability

decrease expenditure on quality control

all of these

[#]

16.

The tool life, in case of continuous cutting, is much better than intermittent cutting.

Agree

Disagree

[#]

17.

Jigs are heavier than fixtures in construction.

Yes

[#]

18.

A diamond locating pin is used in jigs and fixtures because

diamond is very hard and wear resistant

it occupies very little space

it helps in assembly with tolerance on centre distance

it has a long life

[#]

19.

Which of the following statements regarding laws governing the friction between dry surfaces are correct?

The friction force is dependent on the materials of the contact surfaces.

The friction force is directly proportional to the normal force.

The friction force is independent of me area of contact.

all of the above

[#]

20.

The throw of the eccentric is equal to the valve travel.

Correct

Incorrect

[#]

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Online Mechanical Engineering Test - Mechanical Engineering Test - Random

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