Question

Write True/False :
(i) Manual handling causes over a third of all workplace injuries.
(ii) Maintenance cost of slip ring motor is less as compared to squirrel cage motor.
(iii) Always place transformer in a dry area.
(iv) The core of electromagnet is made up of soft iron or silicon steel lamination.
(v) Three-phase induction motors are used for domestic purposes.
(vi) DC series motor is used when high starting torque is required.

Answer 1

Manual handling is responsible for over one-third of all workplace injuries. hfill True
textitExplanation: Manual handling contributes significantly to workplace injuries due to strain and incorrect lifting techniques.
Slip ring motors incur higher maintenance costs than squirrel cage motors. hfill False
textitExplanation: Slip ring motors require more maintenance due to the presence of brushes and slip rings.
Transformers must always be situated in dry environments. hfill True
textitExplanation: Keeping transformers in dry locations prevents moisture-related damage and insulation failure.
Electromagnet cores are constructed from soft iron or silicon steel laminations. hfill True
textitExplanation: Soft iron or silicon steel laminations are used in electromagnet cores to minimize eddy current losses.
Three-phase induction motors are employed for domestic applications. hfill False
textitExplanation: Single-phase induction motors are commonly used for home appliances, whereas three-phase motors are utilized in industrial settings.
DC series motors are suitable for applications demanding high starting torque. hfill True
textitExplanation: DC series motors deliver substantial starting torque, making them ideal for equipment like cranes and hoists.