G. Basic Engineering Principles

Question 1

(Mechanics) The science concerned with the effect of forces on rigid bodies.

a. Statics
b. Engineering Mechanics
c. Dynamics
d. Kinematics
e. All of the Above

Answer 1

b. Engineering Mechanics

Question 2

(Mechanics) Branch of engineering mechanics dealing with the effect and distribution of forces on rigid bodies which remain at rest.

a. Statics
b. Engineering Mechanics
c. Dynamics
d. Kinematics
e. All of the Above

Answer 2

A. Statics

Question 3

(Mechanics) Branch of engineering mechanics dealing with the motion of rigid bodies caused by the forces applied to them.

a. Statics
b. Engineering Mechanics
c. Dynamics
d. Kinematics
e. All of the Above

Answer 3

c. Dynamics

Question 4

(Mechanics) In the study of engineering mechanics, the following are true except:

a. Engineering mechanics considers external effects of forces to rigid body
b. Engineering mechanics considers the internal effects of forces to rigid body
c. Both A and B
d. NOTA

Answer 4

b. Engineering mechanics considers the internal effects of forces to rigid body

Question 5

(Statics) Parallelogram law states that

a. Resultant of two forces is the diagonal of the parallelogram formed on the vectors of these forces
b. Resultant of two forces is the third side of the triangle formed on the vectors of these forces
c. Resultant of the forces are the scalar sum of the forces
d. Resultant of the forces are the scalar sum of the two vector of the forces
e. NOTA

Answer 5

A. Resultant of two forces is the diagonal of the parallelogram formed on the vectors of these forces

Question 6

(Statics) An action that tends to change or change the state of motion of a body or to distort it.

a. Impulse
b. Momentum
c. Force
d. Strength
e. All of the above

Answer 6

c. Force

Question 7

(Statics) Principle of transmissibility states that

a. force applied to a body has the same external effects in all points of a body even different with its line of action.
b. force applied to a body has the same external effects in all points of a body along its line of action.
c. force applied to a body has the same external effects in all points of a body along its line of action.
d. force applied to a body has different external effects in all points of a body along its line of action.
e. NOTA

Answer 7

c. force applied to a body has the same external effects in all points of a body along its line of action.

Question 8

(Statics) Forces acting on the same plane.
a. Coplanar
b. Concurrent
c. Non-coplanar
d. Non-concurrent
e. Parallel

Answer 8

a. Coplanar

Question 9

(Statics) Which is true about resultant?
a. It is the effect of a force system on a body;
b. It is the vector sum of all forces acting on a rigid body.
c. Both A and B
d. NOTA

Answer 9

c. Both A and B

Question 10

(Statics) Resultant of concurrent forces are
a. Scalar sum of the concurrent forces
b. Vector sum of the concurrent forces
c. Cross product of the concurrent forces
d. Dot product of the concurrent forces
e. NOTA

Answer 10

b. Vector sum of the concurrent forces

Question 11

(Statics) System of forces whose magnitude of the resultant is zero and does have a moment.
a. Coplanar
b. Concurrent
c. Non-coplanar
d. Non-concurrent
e. Couple

Answer 11

e. Couple

Question 12

(Statics) System of forces in equilibrium is
a. Resultant of the forces is equal unity.
b. The body at which the forces are exerted moves at a constant velocity in a straight line
c. The body at which the forces are exerted moves at an increasing velocity in a straight line
d. Resultant of the forces is zero.
e. System of forces produces zero moment.

Answer 12

B
D
E

Question 13

(Statics) A contact resistance exerted by one body upon a second body when the second body moves or tends to move past the first body.

a. Dynamic Force
b. Normal Force
c. Friction Force
d. Static Force
e. NOTA

Answer 13

c. Friction Force

Question 14

(Statics) The following are true about friction, except

a. Friction is a retarding force always acting opposite to the motion or the tendency to move.
b. Friction exist due to the roughness of the contact surface.
c. Friction is neglected for smooth surfaces.
d. Friction is an asset to brakes and a liability to power transmission.
e. NOTA

Answer 14

e. NOTA

Question 15

(Thermo) It refers to the temperature at which molecular motion ceases, according to the kinetic theory of heat.

a. critical point
b. triple point
c. absolute zero
d. absolute temperature

Answer 15

c. absolute zero

Question 16

(Thermo) In a 2-phase system, 30% moisture means:

a. 70% liquid and 30% vapor
b. 70% vapor and 30% liquid
c. 100% vapor and 30% liquid
d. 100% liquid and 30% vapor

Answer 16

b. 70% vapor and 30% liquid

Question 17

(Thermo) Kinetic energy is the energy of the body due to its

a. elevation
b. temperature
c. motion
d. pressure

Answer 17

c. motion

Question 18

Power is work done per

a. 33 000 ft-lb
b. 2450 kg
c. unit time
d. work times distance

Answer 18

c. unit time

Question 19

(Thermo) To create the Kelvin and Rankine absolute temperature scales, two states were assigned selected temperature. The two states were:

a. ice point & steam point at Patm
b. ice point & steam point at absolute zero pressure
c. saturated liquid point & saturated vapor point at Patm
d. ice point & critical point at Patm

Answer 19

a. ice point & steam point at Patm

(aka freezing and boiling point at Patm)

Question 20

(Thermo) Area under T-s diagram is defined as:

a. work
b. heat
c. change in internal energy
d. NOTA

Answer 20

b. heat

Question 21

(Thermo) Thermodynamics cycle used in vapor power plants

a. Erricson
b. Brayton
c. Rankine
d. Carnot

Answer 21

c. Rankine

Question 22

(Thermo) The state of pure substance is defined completely if we define

a. pressure and temperature
b. two independent intensive properties
c. two intensive properties
d. any two properties

Answer 22

b. two independent intensive properties

Question 23

(Thermo) An isentropic process is used to approximate an actual process. For such a process

a. the temperature change must not be large
b. both work and heat transfer is zero
c. no work must occur
d. the heat transfer is zero

Answer 23

d. the heat transfer is zero

Question 24

(Thermo) The amount of transferred heat required to change the temperature of unit weight of substance at one-degree unit of temperature.

a. Sensible heat
b. Heat of fusion
c. Latent heat
d. Specific heat

Answer 24

d. specific heat

Question 25

(Thermo) A gas turbine works on the principle of a. Carnot cycle b. Bell-Coleman cycle c. Rankine cycle d. Brayton cycle

Answer 25

d. Brayton cycle Carnot cycle - no actual engine made based on this; theoretical cycle Rankine cycle - vapor power cycle Bell-Coleman cycle - refrigeration and air conditioning; reverse of Brayton cycle

Question 26

(Thermo) The absolute zero temperature in Celsius scale a. 100 b. 0 c. -273 d. 273

Answer 26

c. -273

Question 27

(Thermo) The process that has no heat transfer a. isothermal b. isometric c. isentropic d. adiabatic

Answer 27

d. adiabatic

Question 28

(Thermo) The boiling point of water in an open container at sea level is 100 degree celsius. If the pressure on the open container is decreased suck as going up to the top of a mountain, the boiling point will be a. increased b. decreased c. the same d. none of the above

Answer 28

b. decreased

Question 29

A rigid container is heated by the sun. There is no shaft work associated with the container. From the first law of thermodynamic, determine the heat added to be a. equal to the work b. equal to the change in internal energy d. equal to unity

Answer 29

b. equal to the change in internal energy Q = ∆U + W if W=0, Q is equal to the ∆U which is the change in internal energy

Question 30

(Thermo) An adiabatic process is characterized by which of the following? a. temperature change is zero b. heat transfer is zero c. work is zero d. absolute temperature

Answer 30

b. heat transfer is zero

Question 31

(Thermo) When heat is removed from a substance, it gets colder. When no more heat can be removed and the temperature cannot be lowered any further, we have reached a. perfect zero b. absolute zero c. double zero d. cold zero

Answer 31

b. absolute zero absolute zero = temperature na nagcecease ang movement ng molecules - it is also the lowest temperature that can be reached

Question 32

(Thermo) A 100% efficient pump can draw a suction of a. 34 ft H20 b. 14.7 psi c. 29.92 in Hg d. All of the above

Answer 32

d. All of the above All choices are equal to atmospheric pressure

Question 33

(Thermo) If the temperature of the medium is 0°C, what will be the temperature if it is doubled? a. 0°C b. 524°R c. 273°C d. 460°F

Answer 33

c. 273°C 0°C = 273°K 2(273°K) = 546°K °K = °C + 273 546°K - 273 = °C °C = 273°C

Question 34

A closed system experiences a reversible process where heat rejection is the only energy transferred. The entropy change must be a. zero b. positive c. negative d. equal to heat transferred

Answer 34

c. negative

Question 35

(Thermo) If a centrifugal pump tends to vibrate, it might be caused by: a. misalignment b. worn bearings c,. clogged or damaged impeller d. any of the above

Answer 35

d. any of the above

Question 36

(Thermo) A manometer measures a. temperature b. pressure c. mass d. volume

Answer 36

b. pressure

Question 37

(Thermo) A pyrometer measures a. temperature b. pressure c. volume d. mass

Answer 37

a. temperature

Question 38

(Thermo) A pump is used to increase the pressure of the water entering the boiler of steam power cycle. Which statement is true concerning the pump? a. The pump produces work b. The pump has no effect on the cycle c. The enthalpy of water leaving the pump is lower than the enthalpy of water entering d. The enthalpy of water leaving the pump is higher than the enthalpy of water entering

Answer 38

d. The enthalpy of water leaving the pump is higher than the enthalpy of water entering

Question 39

(Thermo) The steam power cycle is modeled by ideal cycle known as the: a. Otto cycle b. Brayton cycle c. Rankine cycle d. Diesel Cycle

Answer 39

c. Rankine cycle

Question 40

(Thermo) The open system first law should be utilized for all except: a. turbine b. pump c. piston cylinder with no intake/exhaust valve d. boiler

Answer 40

c. piston cylinder with no intake/exhaust valve

Question 41

(Thermo) An inventor claims to have built an engine which will revolutionize the automotive industry. Which of the following should be the best test to determine if the inventors claim is true? a. Conservation of mass b. First law of thermodynamics c. Zeroth law of thermodynamics d. Second law of thermodynamics

Answer 41

d. Second law of thermodynamics pag automotive, ito ang ginagamit

Question 42

(Thermo) In an ideal cycle, liquid leaves the condenser and is expanded in such a manner that the enthalpy of the liquid is equal to the enthalpy of the resulting saturated mixture. This type of expansion is known as: a. throttling process b. isothermal process c. adiabatic process d. isochoric

Answer 42

a. throttling process constant enthalpy

Question 43

(Thermo) A type of process where the pressure remains constant a. Isothermal b. Isochoric c. Isobaric d. Adiabatic

Answer 43

c. Isobaric

Question 44

(Thermo) A type of process where the temperature remains constant a. Isothermal b. Isochoric c. Isobaric d. Adiabatic

Answer 44

a. Isothermal

Question 45

(Thermo) A type of process where the volume remains constant a. Iso