CWEA Grade 1 Mechanical Technologist – 100 Question Practice Exam

CWEA Grade 1 Mechanical Technologist – 100
Question Practice Exam

Mechanical Principles
Q1. A lever lifts a load of 300 N with an effort of 75 N. What is
the mechanical advantage?
A) 3
B) 4
C) 4
D) 5
Explanation: MA = Load / Effort = = 4.
Q2. Torque is calculated by:
A) Force × Mass
B) Force × Acceleration
C) Force × Distance from pivot
D) Force ÷ Distance
Explanation: Torque = Force × perpendicular distance from
pivot.
Q3. Which of the following is a simple machine?
A) Engine
B) Pulley
C) Bearing
D) Pump
Explanation: A pulley is a classic simple machine used to lift
loads.

, Q4. Work is defined as:
A) Mass × Velocity
B) Force × Distance in direction of force
C) Force × Time
D) Acceleration × Distance
Explanation: Work = Force × Distance moved in the direction of
the force.
Q5. Power is:
A) Work × Time
B) Work ÷ Mass
C) Work ÷ Time
D) Force × Distance × Mass
Explanation: Power measures how fast work is done.
Q6. Efficiency of a machine is calculated by:
A) Output ÷ Input × 100%
B) Input ÷ Output × 100%
C) Output × Input ÷ 100%
D) Output ÷ Input × 100%
Explanation: Efficiency = (Useful output ÷ Input) × 100%.
Q7. A class I lever has the fulcrum at the center. Which type of
load and effort?
A) Effort at center
B) Fulcrum at center, effort and load on opposite sides
C) Load at center only
D) Effort and load at same end