3A1 Practice Test 1

Question 1

Gases such as air, nitrogen and oxygen can be roughly defined as perfect gases because they:
Select one:

A.
Condense rapidly during condition changes

B.
Can expand without being heated

C.
Remain in gaseous form during condition changes

D.
Cannot be superheated

E.
None of the above

Answer 1

C.
Remain in gaseous form during condition changes

Question 2

Specialty steels for construction of bridges, boilers and ships are refined in an oxygen furnace because:
Select one:

A.
It reduces the time needed to produce the steel

B.
The high temperatures reduce the amount of alloy elements needed to strengthen the steel

C.
The high temperature produces steel with a very fine grain structure

D.
This method reduces impurities and gives the steel greater strength

E.
The slow operation gives advantages over other processes.

Answer 2

D.
This method reduces impurities and gives the steel greater strength

Question 3

Referring to the diagram below, the enthalpy change of 2108.5 kJ/kg represents the:

10_06

Select one:

A.
Latent heat

B.
Sensible heat

C.
Total enthalpy

D.
Specific enthalpy

E.
Superheat energy

Answer 3

A.
Latent heat

Question 4

A refrigerator with a mass of 150 kg sits on a perfectly level surface. It is pushed by a force of 350 N, acting upward at 30 degrees to the horizontal. If the coefficient of friction between the refrigerator and the surface is 0.25, what will happen to the refrigerator?
Select one:

A.
The refrigerator will start moving maintaining a steady speed as kinetic friction increases

B.
The refrigerator will slide and continue to accelerate

C.
The refrigerator will slide at a constant velocity

D.
The refrigerator will tip

E.
The refrigerator will not move

Answer 4

E.
The refrigerator will not move

Question 5

The hammer of a pile driver has a mass of 3000 kg. It falls through a height of 9 m. The hammer’s kinetic energy just before impact is:
Select one:

A.
27.0 kJ

B.
264.87 kJ

C.
27,000 kJ

D.
243,000 J

E.
None of the above

Answer 5

B.
264.87 kJ

Question 6

Rearranging an equation to isolate the unknown is called:
Select one:

A.
Isolating.

B.
Interpolating.

C.
Squaring.

D.
Transposing.

E.
Solving.

Answer 6

D.
Transposing.

Question 7

A horizontal boiler shell is 180 cm in diameter and 5 m long. It is filled with water to a depth of 160 cm. What is the area of the segment of the end plate below the water line?

03_17

Select one:

A.
1.87 m²

B.
1.98 m²

C.
2.17 m²

D.
2.24 m²

E.
2.39 m²

Answer 7

E.
2.39 m²

Question 8

The major axis of an ellipse is 38 cm long and the area of the ellipse is 418 cm². What is the length of the minor axis?
Select one:

A.
7 cm

B.
14 cm

C.
16 cm

D.
28 cm

E.
32 cm

Answer 8

B.
14 cm

Question 9

_____ does not contain any neutrons in its nucleus.
Select one:

A.
Helium

B.
Carbon

C.
Oxygen

D.
Hydrogen

E.
Nitrogen

Answer 9

D.
Hydrogen

Question 10

To stabilize themselves, hydrogen and carbon atoms combine and:
Select one:

A.
Form non-organic compounds

B.
Share electrons between themselves

C.
Share protons between themselves

D.
The hydrogen atoms give up two electrons to the carbon atom

E.
Share neutrons between themselves

Answer 10

B.
Share electrons between themselves

Question 11

The force that is equal in magnitude but opposite in direction to the resultant force is called the:
Select one:

A.
Component

B.
Element

C.
Displacement

D.
Equilibrant

E.
Impedance

Answer 11

D.
Equilibrant

Question 12

The “mass density” of a substance is commonly called “density.” It has a unit of:
Select one:

A.
Kg/cm³

B.
N/kg

C.
Kg/m³

D.
lbs/ft²

E.
m³/kg

Answer 12

C.
Kg/m³

Question 13

Refer to the triangle below. Pythagoras’ Theorem for this triangle may be stated as:

02_01

Select one:

A.
b² = c² + a²

B.
c² = a² - b²

C.
c² = a² + b²

D.
a² = c² + b²

E.
c² = b² - a²

Answer 13

C.
c² = a² + b²

Question 14

Referring to the triangle ABC below, the ratio of opposite side/adjacent side (b/a) for angle B is called the:

02_01

Select one:

A.
Sine of angle B or Sin B

B.
Cosine of angle B or Cos B

C.
Secant of angle B or Sec B

D.
Tangent of angle B or Tan B

E.
Cotangent of angle B or Cot B.

Answer 14

D.
Tangent of angle B or Tan B

Question 15

Ionic compounds are formed by the:
Select one:

A.
Sharing of electrons between atoms

B.
Sharing of atoms between elements

C.
Transferring of protons between atoms

D.
Transferring of electrons between the atoms

E.
Sharing of molecules between atoms

Answer 15

D.
Transferring of electrons between the atoms

Question 16

A wooden A frame is to be used to remove an air compressor from a truck bed. The top of the A frame must be 4 m from the ground, and the legs are to be 3 m apart at the bottom. What is the length of each leg of the A frame?
Select one:

A.
3.85 m

B.
4.27 m

C.
4.73 m

D.
6.27 m

E.
11.39 m.

Answer 16

B.
4.27 m

Question 17

A rope block hangs from a beam. The rope is passing around two sheaves (sheave = wheel or disk with a grooved rim, especially one used as a pulley) in each block as illustrated below. Find the mass that can be lifted with an effort of 40 N.

07_37

Select one:

A.
16.30 kg

B.
20.39 kg

C.
24.46 kg

D.
30.58 kg

E.
160 kg

Answer 17

A.
16.30 kg

Question 18

The moment of a force about a point is:
Select one:

A.
The component that will bring the system to equilibrium

B.
The force multiplied by the resultant

C.
The force multiplied by the equilibrant

D.
The force multiplied by the perpendicular distance between the force and the pivot point

E.
Equal to time multiplied by the force

Answer 18

D.
The force multiplied by the perpendicular distance between the force and the pivot point

Question 19

A steel bar is 4 m long, and has a rectangular cross section of 3 cm x 4 cm. It is in tension from a force of 360 kN. Find the stress induced.
Select one:

A.
300 kPa

B.
300 MPa

C.
120,000 kPa

D.
300,000 kN/cm²

E.
None of the above

Answer 19

B.
300 MPa

Question 20

Pipe rack details with elevations and layout of process lines are included on:
Select one:

A.
P&IDs

B.
Process Flow Diagrams

C.
Construction Drawings

D.
Equipment layout or plot plan drawings

E.
Electrical Drawings

Answer 20

D.
Equipment layout or plot plan drawings

Question 21

The _____ of a screw thread is the axial distance moved for one complete revolution.
Select one:

A.
Lead

B.
Lag

C.
Taper

D.
Size

E.
Length

Answer 21

A.
Lead

Question 22

Grey cast iron is produced by:
Select one:

A.
Firing the cupola hotter than normal and then cooling the molten material quickly

B.
Cooling the molten material from the cupola furnace slowly thus allowing the carbon to disassociate and form graphite within the iron

C.
Keeping the cupola furnace cooler than normal and then cooling the molten material quickly to keep the carbon combined with the iron

D.
Adding graphite to the pig iron as you melt it in the cupola furnace to give it the grey color and fibrous appearance

E.
Adding bauxite to the pig iron as you melt it in the cupola furnace to give it the grey color and fibrous appearance

Answer 22

B.
Cooling the molten material from the cupola furnace slowly thus allowing the carbon to disassociate and form graphite within the iron

Question 23

The common and Naperian logarithms for the number 272 are:
Select one:

A.
1.4346, 3.3032

B.
2.4346, 5.6058

C.
3.4345, 7.9084

D.
4.4345, 7.9084

E.
5.4345, 7.9084.

Answer 23

B.
2.4346, 5.6058

Question 24

Determine the shear forces at sections 4 m and 12 m from the left support of the beam shown below. Assume that positive sign indicates force acting upwards and negative sign indicates force acting downward.

06_35

Select one:

A.
At 4 m = + 400 N, at 12 m = -1200 N

B.
At 4 m = -1000 N, at 12 m = +1000 N

C.
At 4 m = +1000 N, at 12 m = -1000 N

D.
At 4 m = +1000 m, at 12 m = -2000 N

E.
At 4 m = -800 m, at 12 m = +1200 m

Answer 24

B.
At 4 m = -1000 N, at 12 m = +1000 N

Question 25

What is ‘ln N’ if log N = 3.825
Select one:

A.
1.522

B.
1.661

C.
8.807

D.
28.087

E.
88.087.

Answer 25

C.
8.807

Question 26

In order to completely burn 60 kg of carbon the oxygen necessary will be:
Select one:

A.
60 kg

B.
80 kg

C.
90 kg

D.
100 kg

E.
160 kg

Answer 26

E.
160 kg

Question 27

To “expand a gas” means the gas is:
Select one:

A.
Always at constant volume

B.
Always at constant pressure

C.
Always at constant temperature

D.
Able to perform useful work

E.
Required to have work preformed on it

Answer 27

D.
Able to perform useful work

Question 28

A tire that turned two and three quarter (2 ¾) revolutions has turned an equivalent of ___________ radians.
Select one:

A.
6.28

B.
8.64

C.
17.28

D.
171.29

E.
2.75

Answer 28

C.
17.28

Question 29

Oxygen is lanced into the molten metal in the Electric Arc Furnace to:
1. Increase the heat and promote faster melting of the pig iron
2. Form oxides that float to the surface
3. Lower the carbon content to the desired levels
4. Enhance the electrical current flow
Select one:

A.
1, 2

B.
2, 3

C.
3, 4

D.
1, 3

E.
2, 4

Answer 29

B.
2, 3

Question 30

A triangle in which all three sides (a, b, c) are different lengths, is called a/an ___________ triangle.:

Select one:

A.
Isosceles

B.
Scalene

C.
Equilateral

D.
Unilateral

E.
Right

Answer 30

B.
Scalene

Question 31

From the Superheat Tables the symbol “v” means the specific:
Select one:

A.
Viscosity of the steam

B.
Volume of the steam

C.
Velocity of the steam

D.
Volume of the water

E.
Velocity of the water

Answer 31

B.
Volume of the steam

Question 32

If we find the maximum load applied to a sample being subjected to an ultimate tensile strength test, and know the cross-sectional area of the sample prior to testing, we can calculate the ultimate tensile strength of the sample by:
Select one:

A.
Dividing the original cross-sectional area into the maximum load applied

B.
Multiplying the original cross-sectional area by the maximum load applied

C.
Dividing the final cross-sectional area by the maximum load applied

D.
Dividing the original cross-sectional area by the maximum load applied and multiplying by the cross-sectional area found at the break

E.
Dividing the original cross-sectional area into the minimum load applied

Answer 32

A.
Dividing the original cross-sectional area into the maximum load applied

Question 33

Referring to the figure below, the hypotenuse is the side:

02_01

Select one:

A.
a

B.
b

C.
c

D.
A

E.
B.

Answer 33

C.
c

Question 34

For Chloride Stress Corrosion cracking to occur in stainless steels there must be:
Select one:

A.
Oxygen in the solution

B.
A temperature above 100°C

C.
Water vapor or moisture in the air

D.
A flaw in the design of the piece of metal

E.
An alkaline solution in contact with the steel

Answer 34

A.
Oxygen in the solution

Question 35

In the expression 4² = 16, the number ‘4’ is called the _____ of 16.
Select one:

A.
Square root.

B.
Cube root.

C.
Square.

D.
Cube.

E.
Multiplicand.

Answer 35

A.
Square root.

Question 36

If the boiler water pH has been below 7.0 for more than one hour there is a high potential for:
Select one:

A.
Caustic Embrittlement

B.
Caustic Gouging

C.
Scale build up under which the corrosion will be enhanced

D.
Hydrogen damage or hydrogen embrittlement

E.
The generation of flammable gases and an explosion

Answer 36

Hydrogen damage or hydrogen embrittlement

Question 37

What is the area of a triangle whose sides measure 4 km, 5 km and 7 km?
Select one:

A.
9.80 km²

B.
10.78 km²

C.
20.00 km²

D.
35 km²

E.
140 km²

Answer 37

A.
9.80 km²

Question 38

A ladder 5 m long leans against a wall, and is inclined at 65 degrees to the ground. How high up the wall does the ladder reach?
Select one:

A.
2.11 m

B.
4.53 m

C.
4.71 m

D.
5.52 m

E.
10.72 m.

Answer 38

B.
4.53 m

Question 39

The legend that accompanies a set of P&ID’s is used to identify:
Select one:

A.
The various processes the are included in the drawings

B.
The originator of the drawings and the contact numbers where they can be reached

C.
The actual flow rates, temperatures and pressures that will be experienced throughout the various processes on the P&IDs

D.
The symbols and abbreviations that are used in the P&ID’s

E.
The author of the drawing

Answer 39

D.
The symbols and abbreviations that are used in the P&ID’s

Question 40

An octagon has sides 4 cm long. How much larger is its area than a circle with a radius which is also 4 cm long?
Select one:

A.
8.66 cm²

B.
18.01 cm²

C.
22.67 cm²

D.
27.01 cm²

E.
64.72 cm²

Answer 40

D.
27.01 cm²

Question 41

Compression requires that:
Select one:

A.
The gas be at absolute pressure and temperature

B.
Work be done on the gas

C.
Work be done by the gas

D.
The gas will be at a constant volume

E.
No work is done during the compression process

Answer 41

B.
Work be done on the gas

Question 42

The following items must be present before Sulphide Stress Corrosion Cracking can occur:
1. Hydrogen Sulphide
2. A high strength steel
3. High velocity air movement
4. A surface crack in the steel for the corrosive agent to enter
Select one:

A.
1, 2

B.
2, 3

C.
3, 4

D.
1, 3

E.
1, 4

Answer 42

A.
1, 2

Question 43

A material that does not have ductility will be:
Select one:

A.
Tough

B.
Hard

C.
Malleable

D.
Brittle

E.
Plastic

Answer 43

D.
Brittle

Question 44

Referring to angle B in the figure below, side “a” is called the:

02_01

Select one:

A.
Hypotenuse

B.
Adjacent

C.
Opposite

D.
Reciprocal

E.
Median.

Answer 44

B.
Adjacent

Question 45

Hydrocarbon compounds contain:
Select one:

A.
A number of different elements as well as atoms of hydrogen and carbon

B.
Only atoms of carbon and hydrogen

C.
Atoms of carbon, hydrogen, oxygen and nitrogen

D.
Various organic and inorganic elements

E.
Atoms of carbon, hydrogen, oxygen

Answer 45

B.
Only atoms of carbon and hydrogen

Question 46

Velocity ratio is equal to the:
Select one:

A.
Ideal efficiency

B.
Actual mechanical advantage

C.
Actual efficiency

D.
Actual mechanical ratio

E.
Ideal mechanical advantage

Answer 46

E.
Ideal mechanical advantage

Question 47

The periodic table is used to identify the:
Name and the symbol of a molecule
Atomic weight of a metal
Atomic number and atomic mass of an element
Symbol of the element
Select one:

A.
1, 2

B.
2, 3

C.
3, 4

D.
1, 3

E.
2, 4

Answer 47

C.
3, 4

Question 48

When the sum of the clockwise moments equals the sum of the anti-clockwise moments then:
Select one:

A.
Both forces are zero

B.
Rotational equilibrium exists

C.
The resultant is reduced

D.
The resultant is increased

E.
The equilibrium is greater than the resultant

Answer 48

B.
Rotational equilibrium exists

Question 49

If a bar is heated at one end heat will travel from molecule to molecule until the other end becomes hot. This is known as:
Select one:

A.
Convection

B.
Radiation

C.
Conduction

D.
Specific heat

E.
Sublimation

Answer 49

C.
Conduction

Question 50

The operation of a blast furnace is most efficient when it is:
Select one:

A.
Continuous

B.
At high temperatures

C.
Fired by natural gas

D.
Operated for 12 hours per day

E.
Operated intermittently

Answer 50

A.
Continuous

Question 51

Grey cast iron is used for large motor and compressor bases because it:
Select one:

A.
Is relatively inexpensive to produce and is a harder material than white cast iron

B.
Is easy to cast and has a harder surface than white cast iron

C.
Is strong in tension, compression and withstands heat well

D.
Dampens vibration and sound well and it is strong in compression and shear

E.
Is light and flexible

Answer 51

D.
Dampens vibration and sound well and it is strong in compression and shear

Question 52

A triangle with all three sides the same length is called a/an __________ triangle.

Select one:

A.
Isosceles

B.
Scalene

C.
Acute

D.
Equilateral

E.
Obtuse

Answer 52

D.
Equilateral

Question 53

A rope block hangs from a beam. The rope is passing around two sheaves (sheave = wheel or disk with a grooved rim, especially one used as a pulley) in each block as illustrated below. Find the mass that can be lifted with an effort of 40 N.

07_37

Select one:

A.
16.30 kg

B.
20.39 kg

C.
24.46 kg

D.
30.58 kg

E.
160 kg

Answer 53

A.
16.30 kg

Question 54

A solid brass statue has a mass of 20,000 kg. What mass of steel would be required to exactly duplicate the structure?
Select one:

A.
303.5 kg

B.
18 572 kg

C.
21 347 kg

D.
21 593 kg

E.
20 000 kg

Answer 54

B.
18 572 kg

Question 55

In the following right triangle find the lengths of b and c, if a = 4 cm and angle A = 27 degrees.

02_01

Select one:

A.
b = 5.85 cm, c = 6.81 cm

B.
b = 6.85 cm, c = 7.81 cm

C.
b = 7.85 cm, c = 8.81 cm

D.
b = 9.75 cm, c = 9.81 cm

E.
b = 9.85 cm, c = 10.81 cm.

Answer 55

C.
b = 7.85 cm, c = 8.81 cm

Question 56

Referring to angle B in the figure below, side “a” is called the:

02_01

Select one:

A.
Hypotenuse

B.
Adjacent

C.
Opposite

D.
Reciprocal

E.
Median.

Answer 56

B.
Adjacent

Question 57

Heat transfer due to movement of a fluid is called:
Select one:

A.
Sublimation

B.
Convection

C.
Radiation

D.
Sensible heat

E.
Conduction

Answer 57

B.
Convection

Question 58

A material’s ability to withstand great deformation under high loads before rupturing is a measure of it’s:
Select one:

A.
Toughness

B.
Ductility

C.
Ultimate strength

D.
Malleability

E.
Stiffness

Answer 58

B.
Ductility

Question 59

The measurable degree of hotness or coldness of anything is known as:
Select one:

A.
Percentage

B.
Amount

C.
Heat

D.
Enthalpy

E.
Temperature

Answer 59

E.
Temperature

Question 60

The arrow used to join the two sides of a chemical equation:
Functions as an equals sign
Identifies which part of the chemical reaction happens first
Identifies the direction in which the reaction normally occurs
Has no real value in the equation
Select one:

A.
1, 2

B.
2, 3

C.
3, 4

D.
1, 3

E.
2, 4

Answer 60

D.
1, 3

Question 61

Corrosion is defined as the:
Select one:

A.
Loss of metal or wall thickness due to the flow of abrasive materials

B.
Destruction of a metal by overheating

C.
Destruction of a metal by chemical or electrochemical reaction with its environment

D.
Combination of a metal with other materials, which cause the metal to become harder

E.
Weakening of the metal by over pressure

Answer 61

C.
Destruction of a metal by chemical or electrochemical reaction with its environment

Question 62

The molecular mass of a substance can be found by adding together:
Select one:

A.
The number of protons in each atom in the substance

B.
The number of atoms in the elements within the substance

C.
The atomic masses of the atoms of the elements in the chemical formula of the substance

D.
All the atomic masses of the atoms on the right side of the chemical equation and subtracting that from the atomic masses of the atoms on the left side of the chemical equation

E.
The nucleus masses of the elements

Answer 62

C.
The atomic masses of the atoms of the elements in the chemical formula of the substance

Question 63

The formula “F = (9/5)C + 32”, can be be rearranged as “C = _______”:
Select one:

A.
(9/5)F + 32.

B.
(9/5)F - 32.

C.
(5/9)F + 32.

D.
(5/9)(F - 32).

E.
(5/9) - 32F.

Answer 63

D.
(5/9)(F - 32).

Question 64

The wheel-and-axle system below has dimensions d = 300 mm and R = 1.5 m. If the efficiency of the machine is 90%, find the mechanical advantage of the system.

07_06

Select one:

A.
4.5

B.
5

C.
7

D.
9

E.
10

Answer 64

D.
9

Question 65

The theoretical volume of oxygen (measured at 0°C and 101.325 kPa) needed for the complete combustion of 100 m3 of propane is:
Select one:

A.
300 m³

B.
500 m³

C.
600 m³

D.
800 m³

E.
900 m³

Answer 65

B.
500 m³

Question 66

A motorcycle traveling at 30 km/h increases its velocity uniformly to 110 km/h in the time of 5 seconds, while travelling the distance of 97.2 m. Its acceleration in m/s² is:
Select one:

A.
16

B.
7.78

C.
4.45

D.
28

E.
111.15

Answer 66

C.
4.45

Question 67

A substance is considered to be a _____ if it consists of different elements or compounds or both, all of which retain their individual chemical properties.
Select one:

A.
Compound

B.
Molecule

C.
Atom

D.
Element

E.
Mixture

Answer 67

E.
Mixture

Question 68

In the following triangle, what is the value of sin B and what is the size of the angle B?

02_06

Select one:

A.
0.75, 48.59 degrees

B.
0.80, 53.13 degrees

C.
1.33, 48.6 degrees

D.
0.6, 36,87 degrees

E.
1.67, 53.32 degrees

Answer 68

D.
0.6, 36,87 degrees

Question 69

A sector has sides of 5 m and an angle of 36°. Calculate the area of the sector.

03_22

Select one:

A.
7.184 m²

B.
7.854 m²

C.
8.112 m²

D.
8.334 m²

E.
9.122 m²

Answer 69

B.
7.854 m²

Question 70

An expansion or compression that occurs without heat transfer to or from the gas is:
Select one:

A.
Constant temperature

B.
Isothermal

C.
Adiabatic

D.
Constant volume

E.
Polytropic

Answer 70

C.
Adiabatic

Question 71

Refer to the triangle below. Pythagoras’ Theorem for this triangle may be stated as:

02_01

Select one:

A.
b² = c² + a²

B.
c² = a² - b²

C.
c² = a² + b²

D.
a² = c² + b²

E.
c² = b² - a²

Answer 71

C.
c² = a² + b²

Question 72

Find the horizontal resultant of the system of forces provided below. Use component method.

/jlms/QB/SI/3rd/3rd_SI_A1_04_19.gif

Select one:

A.
0.524 kN acting to the right

B.
0.524 kN acting to the left

C.
1.669 kN acting to the right

D.
1.669 kN acting to the left

E.
1.966 kN acting to the left

Answer 72

B.
0.524 kN acting to the left

Question 73

In the following right triangle find the lengths of b and c, if a = 4 cm and angle A = 27 degrees.

02_01

Select one:

A.
b = 5.85 cm, c = 6.81 cm

B.
b = 6.85 cm, c = 7.81 cm

C.
b = 7.85 cm, c = 8.81 cm

D.
b = 9.75 cm, c = 9.81 cm

E.
b = 9.85 cm, c = 10.81 cm.

Answer 73

C.
b = 7.85 cm, c = 8.81 cm

Question 74

Reflex angles are greater than:
Select one:

A.
45 degrees

B.
90 degrees

C.
120 degrees

D.
180 degrees

E.
270 degrees.

Answer 74

D.
180 degrees

Question 75

The yield point on a tension test is where:
Select one:

A.
The point where the material fails and breaks

B.
The plastic deformation stops and the elastic deformation begins

C.
The stress begins to decrease and the strain begins to increase

D.
The elastic limit is reached and plastic deformation starts

E.
No deformation has taken place

Answer 75

D.
The elastic limit is reached and plastic deformation starts

Question 76

A column 10 cm diameter and 2 m long is subject to a compression force of 800 kN, which shortens the column 1 mm. Find the modulus of elasticity.
Select one:

A.
20,371 kPa

B.
101,850 kPa

C.
20,372 MPa

D.
201,850 MPa

E.
203.72 GPa

Answer 76

E.
203.72 GPa

Question 77

A cylindrical tank has its axis vertical. It is 2 m in diameter and its mass is 800 kg. When it is filled to 2 m high with oil, the total mass is 5050 kg. What is the relative density of the oil?
Select one:

A.
6.312

B.
6.764 kg/m³

C.
6.764

D.
0.876

E.
0.6764

Answer 77

E.
0.6764

Question 78

In the following triangle, find the value of Cos B and its corresponding angle:

02_06

Select one:

A.
0.75, 48.59 degrees

B.
0.80, 36.87 degrees

C.
1.33, 48.60 degrees

D.
0.6, 36.87 degrees

E.
1.67, 53.22 degrees.

Answer 78

B.
0.80, 36.87 degrees

Question 79

A kilomol of a substance is an amount equal to its _____ in kilograms.
Select one:

A.
Number of protons

B.
Molecular mass

C.
Number of neutrons

D.
Balanced mass

E.
Atomic number

Answer 79

B.
Molecular mass

Question 80

An internal combustion engine has 8 cyclinders, the diameter of each of the pistons is 10 cm. Assuming the force of explosion within the cyclinder is 314.16 N, determine the average pressure acting on each of the cyclinders.
Select one:

A.
10 kPa

B.
40 kPa

C.
80 kPa

D.
160 kPa

E.
320 kPa

Answer 80

B.
40 kPa

Question 81

A simply supported beam is 8 m long and has a concentrated load of 40 kN at 3 m from the left end support and a concentrated load of 30 kN at 2 m from the right hand end. Find the support reactions. (Neglect the mass of the beam, picture may not be to scale).

06_57

Select one:

A.
R1 = 37.5 kN, R2 = 32.5 kN

B.
R1 = 32.5 kN, R2 = 37.5 kN

C.
R1 = 35 kN, R2 = 35 kN

D.
R1 = 30.5 kN, R2 = 39.5 kN

E.
R1 = 40 kN, R2 = 30 kN

Answer 81

B.
R1 = 32.5 kN, R2 = 37.5 kN

Question 82

If enough heat is supplied to convert a substance from a solid to a liquid the:
Select one:

A.
Sensible heat will increase

B.
Temperature will rise

C.
Volume will decrease

D.
Potential energy is decreased

E.
Force of cohesion is overcome

Answer 82

E.
Force of cohesion is overcome

Question 83

Increasing the carbon content of the steel will:
1. Increase the hardness
2. Increase the ability to withstand rusting
3. Increase the strength
4. Increase the ability to machine
5. Reduce the ability to machine 6.Increase brittleness
Select one:

A.
1, 2, 3, 4

B.
3, 4, 5, 6

C.
1, 3, 5, 6

D.
2, 3, 5, 6

E.
2, 3, 4, 5

Answer 83

C.
1, 3, 5, 6

Question 84

A load of 750 kg just starts to move when the friction angle is 10°. What effort must be applied parallel to the horizontal surface to stop the motion of the block?
Select one:

A.
7245.72 N

B.
1478.22 N

C.
1297.33 N

D.
1277.62 N

E.
1124.35 N

Answer 84

C.
1297.33 N

Question 85

Solve (a + 5b) - 2(a - 4) = 3(2a + b) - 7(a - 3) for b:
Select one:

A.
10.7

B.
6.5

C.
2.4

D.
5.6

E.
8.7.

Answer 85

B.
6.5

Question 86

Referring to angle A in the figure below, side “a” is called the:

02_01

Select one:

A.
Hypotenuse

B.
Adjacent

C.
Opposite

D.
Reciprocal

E.
Median.

Answer 86

C.
Opposite

Question 87

The plan view of a pipe line is shown below. Find the length of the straight line from A to B, when a = 6 m, b = 11 m (the whole length), and c = 3 m.

02_21

Select one:

A.
11.21 m

B.
12.11 m

C.
13.21 m

D.
14.21 m

E.
15.11 m.

Answer 87

D.
14.21 m

Question 88

The characteristic constant for a gas is given as:
Select one:

A.
Kg/kPa/K

B.
J/g C

C.
KJ/Kg/C

D.
Kg K

E.
KJ/Kg K

Answer 88

E.
KJ/Kg K

Question 89

Referring to the triangle ABC below, the ratio of opposite side/adjacent side (b/a) for angle B is called the:

02_01

Select one:

A.
Sine of angle B or Sin B

B.
Cosine of angle B or Cos B

C.
Secant of angle B or Sec B

D.
Tangent of angle B or Tan B

E.
Cotangent of angle B or Cot B.

Answer 89

D.
Tangent of angle B or Tan B

Question 90

In white cast iron, the carbon in the iron is:
Select one:

A.
Completely removed by heating the pig iron to a very high temperature

B.
Combined with lime and oxygen to produce the white color

C.
Chemically combined in the form of iron carbide or cementite

D.
Reduced to 2% by adding the correct amounts of scrap iron and steel

E.
Combined with aluminum to produce a white color

Answer 90

C.
Chemically combined in the form of iron carbide or cementite

Question 91

What is the value of X in the following fractional equation:
(x/2) + (3x/4) = (4.5/3)
Select one:

A.
0.83

B.
1.2

C.
1.5

D.
1.66

E.
2.0.

Answer 91

B.
1.2

Question 92

The “relative density” of a substance refers to the density of:
Select one:

A.
A substance compared to the density of water

B.
A substance compared to the density of air at standard conditions

C.
A substance compared to the density of gold

D.
A substance compared to the density of the same substance at standard conditions

E.
Water divided by the density of other substance

Answer 92

A.
A substance compared to the density of water

Question 93

Generally, the boiling point of a hydrocarbon compound will:
Select one:

A.
Decrease with increased carbon chain length and increase with increased branching

B.
Decrease with increased carbon chain length and decrease with increased branching

C.
Increase with increased carbon chain length and increase with increased branching

D.
Increase with increased carbon chain length and decrease with increased branching

E.
Remain constant over all chain lengths and branches

Answer 93

D.
Increase with increased carbon chain length and decrease with increased branching

Question 94

Plot plans are used to locate:
Select one:

A.
The area where the underground electrical cables are buried

B.
The equipment on the plant site and location within its process block

C.
That area to set the footings for the equipment

D.
The underground gas and pipelines

E.
The plant within the jurisdiction that it is to be constructed

Answer 94

B.
The equipment on the plant site and location within its process block

Question 95

If A = π r² solve for ‘r’:
Select one:

A.
√(πA)

B.
(πA)/2

C.
√(A/π)

D.
A²π

E.
Aπ².

Answer 95

C.
√(A/π)

Question 96

Shear force at any section or point in a beam is the algebraic sum of all the:
Select one:

A.
Concentrated loads to the right or left of the section being considered

B.
Distributed loads to the right or left of the section being considered

C.
External forces

D.
Parallel forces to the right or left of the section being considered

E.
Vertical forces to the right or the left of the section being considered

Answer 96

E.
Vertical forces to the right or the left of the section being considered

Question 97

The Characteristic Constant of each perfect gas is
Select one:

A.
The same for all perfect gases

B.
The same for all gases if their temperatures are the same

C.
The same for all gases if their pressures are the same

D.
Unique to that particular gas

E.
Varying directly with temperature changes

Answer 97

D.
Unique to that particular gas

Question 98

The coefficient of volumetric expansion for solids is:
Select one:

A.
The cube of the coefficient of linear expansion

B.
Three times the coefficient of linear expansion

C.
Two times the coefficient of linear expansion

D.
The inverse of the coefficient of linear expansion

E.
The square root of the coefficient of linear expansion

Answer 98

B.
Three times the coefficient of linear expansion

Question 99

A cylindrical tank with a vertical axis is 0.6 m in diameter. The oil level falls 20 cm in 17 days. Calculate the quantity of oil used per day in litres.
Select one:

A.
1.662 litres/day

B.
2.236 litres/day

C.
3.325 litres/day

D.
3.318 litres/day

E.
16.632 litres/day

Answer 99

C.
3.325 litres/day

Question 100

Balance the following equation for the combustion of propane:
C3H8 + O2 -> CO2 + H2O + Heat
Select one:

A.
C3H8 + 8O2 -> 3CO2 + 8H2O + Heat

B.
C3H8 + O2 -> 3CO2 + 4H2O + Heat

C.
C3H8 + 5O2 -> 3CO2 + 4H2O + Heat

D.
2C3H8 + 6O2 -> 6CO2 + 8H2O + Heat

E.
2C3H8 + 4O2 -> 6CO2 + 6H2O + Heat

Answer 100

C.
C3H8 + 5O2 -> 3CO2 + 4H2O + Heat

Question 101

A right triangle has a vertical height of 7 m and a base of 4 m. Find the area.
Select one:

A.
28 m²

B.
17 m²

C.
14 m²

D.
11 m²

E.
10.5 m²

Answer 101

C.
14 m²

Question 102

In the following triangle, what is the value of sin B and what is the size of the angle B?

02_06

Select one:

A.
0.75, 48.59 degrees

B.
0.80, 53.13 degrees

C.
1.33, 48.6 degrees

D.
0.6, 36,87 degrees

E.
1.67, 53.32 degrees

Answer 102

D.
0.6, 36,87 degrees

Question 103

If the volume of a confined gas is constant then the absolute pressure is directly proportional to the absolute temperature according to:
Select one:

A.
Boyle’s Law

B.
Bernoulli’s’ Law

C.
Charles’ Law

D.
The General Gas Law

E.
Gay-Lussac’s Law

Answer 103

E.
Gay-Lussac’s Law

Question 104

If four plates of identical physical dimensions are subjected to the same temperature difference, the one made of which material will conduct the most heat?
Select one:

A.
Aluminum

B.
Brass

C.
Copper

D.
Glass

E.
Steel

Answer 104

C.
Copper

Question 105

A material that is able to stand up under a sudden impact or hard blow is described as:
Select one:

A.
Tough or having high impact strength

B.
Elastic or having the ability to resist a force trying to change its shape

C.
Malleable or easy to withstand great deformation

D.
Ductile or can be stretched under load without deformation

E.
Plastic and able to absorb the force

Answer 105

A.
Tough or having high impact strength

Question 106

The transfer of heat by convection involves the:
Select one:

A.
Reduction of mass

B.
Movement of a fluid

C.
Transfer of elements

D.
Radiation of light

E.
Contact between molecules

Answer 106

B.
Movement of a fluid

Question 107

The cantilever below is 6 m long. The force due to the lever’s weight is 9 N, which acts through its mid-point. At 1 m from the pivoted end a force of 298 N acts upward. To keep the system in balance, a load must be placed at the extreme end of the cantilever. What is the magnitude of that load?

06_65

Select one:

A.
243 kg

B.
149.79 N

C.
45.17 kg

D.
4.6 kg

E.
41.75 kg

Answer 107

D.
4.6 kg

Question 108

One of the conditions of a force system in equilibrium is:
Select one:

A.
There are no forces acting parallel to each other

B.
The resultant of the forces produce an acceleration

C.
The sum of the forces to the left must equal the sum of the forces to the right

D.
All the forces in the system must act to the same direction

E.
None of the above

Answer 108

C.
The sum of the forces to the left must equal the sum of the forces to the right

Question 109

The Process Flow Diagram shows:
1. The major equipment items
2. Detailed instrument and control loops
3. The major process flows
4. The piping, drawn to scale
5. The exact orientation of the equipment within the facility
Select one:

A.
1, 2

B.
2, 3, 5

C.
3, 4

D.
1, 3

E.
2, 4, 5

Answer 109

D.
1, 3

Question 110

Referring to the triangle ABC below, the ratio of: adjacent side / hypotenuse side, for angle A, is called the:

02_01

Select one:

A.
Sine of angle A or Sin A

B.
Cosine of angle A or Cos A

C.
Secant of angle A or Sec A

D.
Tangent of angle A or Tan A

E.
Cotangent of angle A or Cot A.

Answer 110

B.
Cosine of angle A or Cos A

Question 111

In the following triangle, what is the value of sin B and what is the size of the angle B?

02_06

Select one:

A.
0.75, 48.59 degrees

B.
0.80, 53.13 degrees

C.
1.33, 48.6 degrees

D.
0.6, 36,87 degrees

E.
1.67, 53.32 degrees

Answer 111

D.
0.6, 36,87 degrees

Question 112

An external source of current that travels along a pipe or other material that it comes into contact with can cause:
Select one:

A.
The pipe or material to become hot

B.
Stray current corrosion in the pipe or material

C.
A reduction in the galvanic corrosion rates

D.
An increase in the galvanic corrosion rates

E.
The generation of an electrical current

Answer 112

B.
Stray current corrosion in the pipe or material

Question 113

Three identical bolts are required to carry a total load of 6.75 t. If the stress allowed in the material is 55,900 kPa, calculate the minimum diameter of each bolt.
Select one:

A.
0.88 mm

B.
22.4 mm

C.
25.4 mm

D.
28.5 mm

E.
66.4 mm

Answer 113

B.
22.4 mm

Question 114

Average velocity is determined by:
Select one:

A.
V(ave) = v/2

B.
V(ave) = u + 2a s²

C.
V(ave) = (u + v)/2

D.
V(ave) = u - at

E.
V(ave) = ut + 1/2 a t²

Answer 114

C.
V(ave) = (u + v)/2

Question 115

By definition, the result of a force moving through a distance is:
Select one:

A.
Power

B.
Acceleration

C.
Work

D.
Moment of force

E.
Velocity

Answer 115

C.
Work

Question 116

The hardness of a material includes its ability to:
Select one:

A.
Absorb impact

B.
Resist penetration

C.
Resist bending

D.
Absorb heat

E.
Resist breaking

Answer 116

B.
Resist penetration

Question 117

A boiler generates 10 kg of dry steam per 2 kg of coal burned. The heating value of the coal is 21,000 kJ/kg. The boiler produces 1500 kPa steam from 60°C feedwater. Calculate the efficiency.
Select one:

A.
57.3%

B.
92.3%

C.
60.5%

D.
74.7%

E.
85.0%

Answer 117

C.
60.5%

Question 118

In the equation where E = stress(σ,τ)/strain(E), E is known as the modulus of elasticity or:
Select one:

A.
Modulus of rigidity

B.
Plastic modulus

C.
Wong’s modulus

D.
Young’s modulus

E.
Modulus of elongation

Answer 118

D.
Young’s modulus

Question 119

The natural or Naperian logarithm of 0.00478 is:
Select one:

A.
-5.3433

B.
-3.0407

C.
-2.3205

D.
2.3205

E.
5.3433.

Answer 119

A.
-5.3433

Question 120

Salts present in the moisture in the air and on the surface of the material that is being corroded will:
1. Increase the corrosion rates of that material
2. Decrease the corrosion rates of that material
3. Cause a neutralizing film to form on the surface of the material
4. Increase the current carrying capacity of the water on the surface of the material
Select one:

A.
1, 2

B.
2, 3

C.
3, 4

D.
1, 3

E.
1, 4

Answer 120

E.
1, 4

Question 121

Acceleration is:
Select one:

A.
The increase of the displacement of a body

B.
A body’s rate of change of velocity

C.
Expressed usually as km/h

D.
The rate of change of time

E.
The increase of the velocity of a body

Answer 121

B.
A body’s rate of change of velocity

Question 122

Each circular half of the figure-8 race track shown here has an outside radius of 145 m. Calculate the minimum size, in hectares, of the rectangular lot that can contain this race track.

03_08

Select one:

A.
16.82 ha

B.
18.1260 ha

C.
19.8397 ha

D.
116.0698 ha

E.
119.0678 ha

Answer 122

A.
16.82 ha

Question 123

Find the vertical component of the resultant of the forces in the figure below.

/jlms/QB/SI/3rd/3rd_SI_A1_04_19.gif

Select one:

A.
1.162 kN act upward

B.
1.5 kN act upward

C.
7.089 kN act upward

D.
12.868 kN act upward

E.
12.868 act down

Answer 123

C.
7.089 kN act upward

Question 124

A perfect gas is compressed under conditions of constant temperature to a volume of 30 m³. If the final pressure of the gas is 450 kPa gauge and the initial volume was 135 m³, what was the initial pressure? (Assume atmospheric pressure to be 101.3 kPa)
Select one:

A.
122.5 kPa gauge

B.
21.2 kPa gauge

C.
223.8 kPa gauge

D.
101.3 kPa gauge

E.
124.8 kPa gauge

Answer 124

B.
21.2 kPa gauge

Question 125

In the following triangle, find the value of Cos B and its corresponding angle:

02_06

Select one:

A.
0.75, 48.59 degrees

B.
0.80, 36.87 degrees

C.
1.33, 48.60 degrees

D.
0.6, 36.87 degrees

E.
1.67, 53.22 degrees.

Answer 125

B.
0.80, 36.87 degrees

Question 126

An octagon is machined from a circle having a diameter of 8 cm. How much area needs to be removed from the circle?

03_09

Select one:

A.
5.012 cm²

B.
6.147 cm²

C.
6.862 cm²

D.
7.147 cm²

E.
8.862 cm²

Answer 126

A.
5.012 cm²

Question 127

Find the antilogarithm of 3.7996.
Select one:

A.
6303.76

B.
630.4

C.
3

D.
63

E.
6.3

Answer 127

A.
6303.76

Question 128

What is the angle of inclination of a stairway with the floor, if the steps have a tread of 20 cm and a rise of 18 cm as illustrated in the sketch?

02_05

Select one:

A.
25.8 degrees

B.
36 degrees

C.
42 degrees

D.
48 degrees

E.
64.12 degrees.

Answer 128

C.
42 degrees

Question 129

Sacrificial Anodes are used to reduce galvanic corrosion of tanks and/or vessels by:
Select one:

A.
Accepting the corrosion action in place of, or instead of, the main equipment surface

B.
Isolating the electrolyte from the internal surface of the main equipment

C.
Reversing the flow of electrical current from the cathode to the anode

D.
Stopping the flow of electrical current completely by breaking the circuit

E.
Providing an anchor point for the vessel

Answer 129

A.
Accepting the corrosion action in place of, or instead of, the main equipment surface

Question 130

In order to calculate the power in watts required to lift a 25 kg concrete block to a height of 40 m, you would also need to know the:
Select one:

A.
Time in seconds

B.
Specific gravity of concrete

C.
Mass-to-height ratio

D.
Atmospheric pressure

E.
Volume and density of the block

Answer 130

A.
Time in seconds

Question 131

If a boiler has a factor of evaporation of 1.075 and its actual flow rate is 220 kg/min, calculate the equivalent evaporation in kg/hr.
Select one:

A.
32871 kg/hr

B.
13200 kg/hr

C.
12279 kg/hr

D.
236.5 kg/hr

E.
14190 kg/hr

Answer 131

E.
14190 kg/hr

Question 132

In a speed test, a car traveling at 40 km/h increases its velocity uniformly for 4 seconds, while traveling the controlled distance of 100 m. Its acceleration in m/s² is:
Select one:

A.
25 m/s²

B.
6.945 m/s²

C.
4.45 m/s²

D.
2.8 m/s²

E.
111.15 m/s²

Answer 132

B.
6.945 m/s²

Question 133

The formula Work = (P1V1 – P2V2) / n - 1 is used to describe expansion during:
Select one:

A.
An isothermal process

B.
An isentropic process

C.
A polytropic process

D.
An adiabatic process

E.
An enthalpy process

Answer 133

C.
A polytropic process

Question 134

A proton has:
Select one:

A.
A negative electrical charge

B.
A positive electrical charge

C.
No electrical charge

D.
A mass of zero

E.
No attraction to the electron

Answer 134

B.
A positive electrical charge

Question 135

During the design and pre-construction phase, P&IDs are used to:
1. Design the control loops and electrical motor control centers
2. Make a detailed equipment list from which to base cost estimates
3. Identify the correct layout of the piping for the pipe fitters and welders
4. Define the scope of the project
Select one:

A.
1, 2

B.
2, 3

C.
3, 4

D.
1, 3

E.
2, 4

Answer 135

E.
2, 4

Question 136

The total amount of heat, in kJ, that is absorbed by the water/steam in a boiler in a given period of time is called the:
Select one:

A.
Heat rate

B.
Factor of evaporation

C.
Equivalent evaporation

D.
Total enthalpy

E.
Latent heat of the transformation

Answer 136

A.
Heat rate

Question 137

Steam that is superheated:
Select one:

A.
Has a greater specific volume than saturated steam at the same pressure

B.
Has less heat than saturated steam at the same pressure

C.
Contains more energy but has the same temperature as saturated steam

D.
Has a volume equal to that of saturated steam

E.
All of the above

Answer 137

A.
Has a greater specific volume than saturated steam at the same pressure

Question 138

Stress Corrosion Cracking is the failure of a material due to cracking which is produced by:
Select one:

A.
Straining the material past its elastic point under corrosive atmospheric conditions

B.
A combination of service conditions and the environment that the material is in

C.
Stressing the material by welding it and then stress relieving it at too high a temperature

D.
Incorrect water treatment of the boiler feed-water

E.
The effects of continued water hammer

Answer 138

B.
A combination of service conditions and the environment that the material is in

Question 139

Materials that can be hammered or rolled into shape without breaking are:
Select one:

A.
Brittle

B.
Hard

C.
Malleable

D.
Plastic

E.
Ductile

Answer 139

C.
Malleable

Question 140

If the amount that a bolt is stretched when subjected to a load is divided by the original length, the ratio found is classed as:
Select one:

A.
Linear stress

B.
Compressive stress

C.
Axial stress

D.
Linear strain

E.
Axial thrust

Answer 140

D.
Linear strain

Question 141

An example of a set of complementary angles would be:
Select one:

A.
45 degrees, 45 degrees and 60 degrees

B.
60 degrees, 60 degrees and 60 degrees

C.
75 degrees and 105 degrees

D.
55 degrees and 45 degrees

E.
75 degrees and 15 degrees.

Answer 141

E.
75 degrees and 15 degrees.

Question 142

The kinetic energy of a 1000 kg automobile travelling at 60 km/h is:
Select one:

A.
16.67 kJ

B.
60 kJ

C.
138.8 kJ

D.
60 000 kJ

E.
None of the above

Answer 142

C.
138.8 kJ

Question 143

An example of an obtuse angle is:
Select one:

A.
135 degrees

B.
180 degrees

C.
33 degrees 13 minutes 45 seconds

D.
90 degrees

E.
270 degrees.

Answer 143

A.
135 degrees

Question 144

Calculate the amount of heat required to raise the temperature of 0.5 kg of aluminum by 35°C.
Select one:

A.
2.27 kJ

B.
15.91 kJ

C.
16.5 kJ

D.
22.7 kJ

E.
45.6 kJ

Answer 144

B.
15.91 kJ

Question 145

The most destructive type of Stray Current Corrosion is:
1. AC Current directly from the Generator
2. AC Current from the transformer once its voltage has been reduced
3. DC Current from a welding device
4. DC Current from an improperly installed cathodic protection system
Select one:

A.
1, 2

B.
2, 3

C.
3, 4

D.
1, 3

E.
1, 4

Answer 145

C.
3, 4

Question 146

The maximum allowable stress of a material that has an ultimate strength of 525 MPa and a safety factor of 7 would be:
Select one:

A.
3675 MPa

B.
367.5 MPa

C.
75 MPa

D.
525 kPa

E.
75 kPa

Answer 146

C.
75 MPa

Question 147

Addition of sensible heat to a substance:
Select one:

A.
Results in a change of state from solid to liquid

B.
Cannot be read on a thermometer

C.
Causes a rise in temperature

D.
Is the sum of the latent heat plus heat of evaporation

E.
Results in a change of phase from liquid to vapor

Answer 147

C.
Causes a rise in temperature

Question 148

What mass of air can be held in a storage cylinder at 95°C and 1500 kPa absolute pressure if the tank volume is 9.5 m³?
Select one:

A.
134.9 kg

B.
144.1 kg

C.
154.9 kg

D.
522.6 kg

E.
725 kg

Answer 148

A.
134.9 kg

Question 149

How much work is required to compress a gas polytropically from 195 kPa abs to 1600 kPa abs while reducing the volume to 0.8 m3? Use the value of “n” for this gas as 1.35.
Select one:

A.
399.26 kJ

B.
758.95 kJ

C.
1540 kJ

D.
1735 kJ

E.
1889 kJ

Answer 149

C.
1540 kJ

Question 150

The plan view of a pipe line is shown below. Find the length of the straight line from A to B, when a = 6 m, b = 11 m (the whole length), and c = 3 m.

02_21

Select one:

A.
11.21 m

B.
12.11 m

C.
13.21 m

D.
14.21 m

E.
15.11 m.

Answer 150

D.
14.21 m