Answers | Latest Version | 2025/2026 |
Correct & Verified
Which mechanical principle best explains the operation of a lever?
A. Fluid mechanics
✔✔B. Mechanical advantage
C. Thermal expansion
D. Electrical resistance
What is the unit of torque in the SI system?
A. Watt
B. Pascal
✔✔C. Newton-meter
D. Joule
Which law of thermodynamics states that energy cannot be created or destroyed?
A. Zeroth law
✔✔B. First law
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,C. Second law
D. Third law
Which type of stress occurs when forces pull a material apart?
A. Shear stress
✔✔B. Tensile stress
C. Compressive stress
D. Torsional stress
Which fluid property describes resistance to flow?
A. Density
✔✔B. Viscosity
C. Pressure
D. Elasticity
What does HVAC stand for in mechanical systems?
A. Heating, Voltage, and Cooling
✔✔B. Heating, Ventilation, and Air Conditioning
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,C. Hydraulic, Vacuum, and Compression
D. Heat, Vibration, and Control
What is the primary purpose of a flywheel?
A. Increase friction
✔✔B. Store rotational energy
C. Reduce torque
D. Measure force
Which type of pump is most suitable for moving large volumes of water in fire protection
systems?
A. Gear pump
B. Diaphragm pump
✔✔C. Centrifugal pump
D. Peristaltic pump
What is the SI unit of pressure?
A. Newton
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, ✔✔B. Pascal
C. Joule
D. Bar
What is the purpose of a heat exchanger?
A. To create heat
✔✔B. To transfer heat between fluids
C. To store heat
D. To convert heat to work
Which device measures fluid pressure in pipelines?
A. Thermometer
B. Flow meter
✔✔C. Manometer
D. Tachometer
Which type of motion is experienced by a piston inside a cylinder?
A. Rotational motion
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