Engineering High School

4. An electrician's pen knife often
A. is used to loosen or tighten small screws.
B. has a small flashlight built in.
C. is intentionally dulled.
D. is kept very sharp to cut wire of large thickness.

Answers

Answer 1

Answer:

option d

is kept very sharp to cut wire of large thickness

Answer 2
D D D D D D D D D D D D D D

Related Questions

A bridge a mass of 800 kg and is able to support up to 4 560 kg. What is its structural efficiency?

Answers

Answer:4560÷800=5.4

Explanation:

Est = DL / W

EST=4560/800=5.7

Brown bears can weigh half a ton (500 kilograms). The piston on the left has a cross-sectional
area of 1 square meter. The piston on the right has a cross-sectional area of 4 square meters.
How much force has to be exerted on the left piston to lift the bear? Show your work and
specify units.

Answers

In order to lift the Bear, a force of 1226.25 N has to be exerted on the left piston,

What is pressure is on the piston carrying the Bear?

The pressure on the piston carrying the Bear is calculated as follows:

Pressure = force/area

Force of the Bear = 500 kg * 9.81 m/s² = 4905 N

Pressure on the right piston = 4905 N / 4 m² = 1226.25 N/m²

To lift the Bear, the pressure on  both sides must be equal.

Force to be applied on the left piston = pressure * area

Force = 1226.25 N/m² * 1 m² = 1226.25 N

Therefore, a force of 1226.25 N has to be exerted on the left piston to lift the bear.

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Determine the dimensions for W if W = P L^3 / (M V^2) where P is a pressure, L is a length, M is a mass, and V is a velocity.

a. M
b. L / T
c. M L / T^2
d. M / (L T^2)
e. No dimensions

Answers

Correct answer is option E. No dimensions

As we know formula Pressure (P) is [tex]\frac{F}{A}[/tex]

also,

Dimensional formula of Pressure is [tex]M^{1}L^{-1}T^{-2}[/tex]Dimensional formula of length is L Dimensional formula of mass is MDimensional formula  of velocity is [tex]L^{1} T^{-1}[/tex]

So, as given W=[tex]\frac{P*L^{3} }{M*V^{2} }[/tex]

Dimensional formula of W =[tex]\frac{M^{1}L^{-1}T^{-2} L^{3} }{M^{1} L^{2}T^{-2} }[/tex]

since all terms get cancelled

Work is dimensionless i.e no dimensions

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Select the correct answer.
Which of these physical concepts is most important in civil engineering?
A energy transformations
B.motion under gravity
C. heat transfer
D. forces In structures
E. atomic structure

Answers

Answer:

option A energy transformation

Option A energy transformations

Choose the person who best completes each statement.

The outbreak and spread of epidemic diseases, such as swine flu, are tracked by a(n) ___.
The person who would use equipment to show an image of a baby before birth is a(n) ___.
The education to become a(n) ___ requires more than four years of college.
When a water source becomes contaminated with an illness-causing bacteria, a(n) ___ could be brought in to study how to get rid of the microorganisms.

Answers

The exercise is about finding the missing medical terms from the list below.. See the sentences below for the missing words.

What are the completed sentences?

The outbreak and spread of epidemic diseases, such as swine flu, are tracked by a Public Health Surveillance Team.The person who would use equipment to show an image of a baby before birth is a Diagnostic Medical Sonographer.The education to become a Medical Practitioner requires more than four years of college.When a water source becomes contaminated with an illness-causing bacteria, a Microbiologist could be brought in to study how to get rid of the microorganisms.

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*Public health surveillance team
*Diagnostic medical sonographer
*Medical practitioner
*Microbiologist

11. What are restrictions when building or completing a challenge?

Answers

Explanation:

The minimum exterior open spaces around buildings that are 55 metres or more, should be 16 metres. On sides where no habitable rooms face, a minimum space of 9 metres shall be left for heights above 27 metres.

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