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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Two shafts 'A' and 'B' transmit the same power. The speed of shaft 'A' is 250 r.p.m. and that of shaft 'B' is 300 r.p.m. The shaft 'B' has the greater diameter.

True

False

[#]

The shear force at apoint on a beam is the algebraic __________ of all the forces on either side of the point.

sum

difference

[#]

The coefficient of venturifiume, generally, lies between

0.3 to 0.45

0.50 to 0.75

0.75 to 0.95

0.95 to 1.0

[#]

The total head of a liquid particle in motion is equal to

pressure head + kinetic head + potential head

pressure head - (kinetic head + potential head)

potential head - (pressure head + kinetic head)

kinetic head - (pressure head + potential head)

[#]

In a venturiflume, the flow takes place at

atmospheric pressure

gauge pressure

absolute pressure

none of these

[#]

Liquid fuels have lower efficiency than solid fuels.

True

False

[#]

The principal constituents of a fuel are

carbon and hydrogen

oxygen and hydrogen

sulphur and oxygen

sulphur and hydrogen

[#]

Which of the following statement is correct regarding the features of a Breeder reactor?

It produces more fuel than it consumes.

It requires highly enriched fuel.

It requires liquid sodium metal as moderator.

all of the above

[#]

The relative efficiency of an I.C. engine is the ratio of the indicated thermal efficiency to the air standard efficiency.

Correct

Incorrect

[#]

10.

In a jet propulsion

the propulsive matter is ejected from within the propelled body

the propulsive matter is caused to flow around the propelled body

its functioning does not depend upon presence of air

none of the above

[#]

11.

The ratio of emissive power of a body to the emissive power of a perfectly black body is called emissivity.

Agree

Disagree

[#]

12.

In a lithium bromide absorption refrigeration system

lithium bromide is used as a refrigerant and water as an absorbent

water is used as a refrigerant and lithium bromide as an absorbent

ammonia is used as a refrigerant and lithium bromide as an absorbent

none of the above

[#]

13.

In a full journal bearing, the angle of contact of the bearing with the journal is

120°

180°

270°

360°

[#]

14.

Which of the following property is essential for spring materials?

Stiffness

Ductility

Resilience

Plasticity

[#]

15.

Tearing resistance required to tear off the plate per pitch length is (where p = Pitch of rivets, d = Dia. of rivet hole, and σ_t = Permissible tensile stress for plate material)

p.d.σ_t

p.t.σ_t

(p - d)σ_t

(p - d)t.σ_t

[#]

16.

When the dimension is expressed as

, then the tolerance is

0.035 mm

0.025 mm

0.01 mm

0.06 mm

[#]

17.

In up milling, the thickness of chip is

minimum at the beginning of the cut and maximum at the end of the cut

maximum at the beginning of the cut and minimum at the end of the cut

uniform throughout the cut

none of these

[#]

18.

In a shaper mechanism, the coriolis component of acceleration does not exist.

True

False

[#]

19.

The relative velocity of B with respect to A in a rigid link AB is

parallel to AB

perpendicular to AB

along AB

at 45° to AB

[#]

20.

The coriolis component of acceleration depends upon

velocity of slider

angular velocity of the link

both (a) and (b)

none of these

[#]

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Online Mechanical Engineering Test - Mechanical Engineering Test - Random

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