Engineering Materials | Mechanical Engineering

Corrosion resistance of steel is increased by adding nickel and chromium.

Byadmin September 14, 2022

Question: Corrosion resistance of steel is increased by adding nickel and chromium.
[A].

Agree

[B].

Disagree

Answer: Option A

Explanation:

No answer description available for this question.

Engineering Mechanics | Mechanical Engineering

A resultant force is a single force which produces the same effect as produced by all the given forces acting on a body.

Question: A resultant force is a single force which produces the same effect as produced by all the given forces acting on a body.
[A].

True
[B].
False

Answer: Option A

Explanation:

No answer description available for this question.

Read More A resultant force is a single force which produces the same effect as produced by all the given forces acting on a body.
Heat Transfer | Mechanical Engineering | Refrigeration and Air Conditioning

It is desired to condition the outside air from 70% relative humidity and 45° C dry bulb temperature to 50% relative humidity and 25° C dry bulb temperature (room condition). The practical arrangement will be

Question: It is desired to condition the outside air from 70% relative humidity and 45° C dry bulb temperature to 50% relative humidity and 25° C dry bulb temperature (room condition). The practical arrangement will be
[A].

dehumidification
[B].
cooling and humidification
[C].
cooling and dehumidification
[D].
dehumidification and pure sensible cooling

Answer: Option C

Explanation:

No answer description available for this question.

Read More It is desired to condition the outside air from 70% relative humidity and 45° C dry bulb temperature to 50% relative humidity and 25° C dry bulb temperature (room condition). The practical arrangement will be
Engineering Materials

Steel contains____________________?

Steel contains____________________?

A. 80% or more iron
B. 50% or more iron
C. alloying elements like chromium, tungsten nickel and copper
D. elements like phosphorus, sulphur and silicon in varying quantities
E. high quantities of sulphur

Read More Steel contains____________________?
Engineering Mechanics | Mechanical Engineering

A lead ball with a certain velocity is made to strike a wall, it falls down, but rubber ball of same mass and with same velocity strikes the same wall, it rebounds. Select the correct reason from the following:

Question: A lead ball with a certain velocity is made to strike a wall, it falls down, but rubber ball of same mass and with same velocity strikes the same wall, it rebounds. Select the correct reason from the following:
[A].

both the balls undergo an equal change in momentum
[B].
the change in momentum suffered by rubber ball is more than the lead ball
[C].
the change in momentum suffered by rubber ball is less than the lead ball
[D].
none of the above

Answer: Option B

Explanation:

No answer description available for this question.

Read More A lead ball with a certain velocity is made to strike a wall, it falls down, but rubber ball of same mass and with same velocity strikes the same wall, it rebounds. Select the correct reason from the following:
Heat Transfer | Mechanical Engineering | Refrigeration and Air Conditioning

An electric cable of aluminium conductor (k = 240 W/mK) is to be insulated with rubber (k = 0.15 W/mK). The cable is to be located in air (h = 6 W/m2). The critical thickness of insulation will be

Question: An electric cable of aluminium conductor (k = 240 W/mK) is to be insulated with rubber (k = 0.15 W/mK). The cable is to be located in air (h = 6 W/m2). The critical thickness of insulation will be
[A].

25 mm
[B].
40 mm
[C].
160 mm
[D].
800 mm

Answer: Option A

Explanation:

No answer description available for this question.

Read More An electric cable of aluminium conductor (k = 240 W/mK) is to be insulated with rubber (k = 0.15 W/mK). The cable is to be located in air (h = 6 W/m2). The critical thickness of insulation will be
Engineering Materials

Acidic solution is one which has pH value__________________?

Acidic solution is one which has pH value__________________?

A. greater than 7
B. less than 7
C. equal to 7
D. pH value has nothing to do with neutral solution
E. none of the above

Read More Acidic solution is one which has pH value__________________?

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