CET Study Guide 2026
Everything you need to pass the CET exam in one place: the exam format, every topic to study, real practice questions with explanations, flashcards, and full-length practice tests. Free, no sign-up needed.
📋 CET Exam Format at a Glance
📚 CET Topics to Study (69)
✍️ Sample CET Questions & Answers
1. What does a 'step sag' or 'step level' device detect on an escalator?
A step level switch detects when a step sags or rises out of the normal tread plane, triggering an emergency stop to prevent a tripping hazard.
2. Under ASME A17.1, what is the required frequency for performing a 'no-load safety test' on a traction elevator?
ASME A17.1 requires a no-load safety test to be performed every 6 months to verify proper operation of the car safety device.
3. Which type of motor is commonly used in modern traction elevator systems?
AC gearless permanent magnet motors are widely used for their energy efficiency and smooth operation.
4. What is the purpose of a 'motor thermistor' or thermal overload device embedded in the elevator motor windings?
Embedded thermistors change resistance with temperature; when winding temperature exceeds safe limits, the controller detects the resistance change and shuts down the motor.
5. When testing Phase II firefighters' service, what verifies that the car will NOT move when the in-car Phase II switch is in the 'ON' position but no buttons are held?
In Phase II, the car must remain stationary until the operator holds a floor button and door close; spontaneous movement indicates a control system fault.
6. What issue is indicated by frequent elevator leveling problems?
Frequent leveling issues can signal faulty sensors or brake malfunctions affecting stop accuracy.