WorksheetsSimple Crane Model: MCQs
Total questions: 10
Worksheet time: 8mins
What is the main purpose of a gear motor in a crane?
To increase speed
To increase lifting power for heavy loads
To store electrical energy
To reduce power consumption
What does SPDT stand for?
Single Power Double Turn
Single Pole Double Throw
Simple Power Direct Transfer
Switch Pole Dual Turn
What does an SPDT switch help the crane motor do?
Change direction of rotation
Stop automatically
Increase voltage
Store energy
What happens when both SPDT switches in an H-Bridge are turned ON at the same time?
The motor runs faster
The motor stops safely
A short circuit may occur
The direction reverses
Why are gears important in cranes?
What is the power source used in the mini crane project?
3V battery
7.4V battery
9V battery
USB power
What happens to the crane when the motor polarity is reversed?
It lifts faster
The lifting direction changes
It stops completely
The battery drains
What role does a pulley play in the crane model?
It reduces weight
It increases rotation speed
It helps lift loads using a thread
It stores power
Which safety issue can occur if wiring is done incorrectly?
LED glows brighter
Motor works faster
Short circuit and battery damage
Stronger lifting power
What could make a modern crane smarter and more efficient?
Adding colorful lights
Using stronger threads
Adding sensors and automation for control
Making it smaller
