Chapter 7 · MCQ Read Mode

Repair and Maintenance of Engineering System

Maintenance is best defined as actions intended to:

Which is NOT a common reason for the need of maintenance?

The primary objective of maintenance is to:

A machine runs 900 hours with 3 failures. Its MTBF is:

With MTBF = 90 h and MTTR = 10 h, the inherent availability is:

Overall Equipment Effectiveness (OEE) is the product of:

If availability = 0.9, performance = 0.9 and quality = 0.95, OEE is about:

The optimum level of maintenance is where:

A software system used to plan, schedule and record maintenance activities is:

A good maintenance plan improves product quality mainly because:

Which of the following equipment usually requires statutory periodic inspection?

History cards of equipment are mainly used to:

The three elements of the fire triangle are:

Extinguishing a fire by covering it with foam to cut off air is called:

The correct extinguisher for a fire in live electrical equipment is:

Burning petrol (Class B fire) should NOT be extinguished with:

A residual current device (RCD) for personal protection is normally set to trip at about:

Before carrying out maintenance on electrical or mechanical equipment, the energy sources should be:

Gloves should NOT be worn while operating a drilling machine because:

Galvanised steel is protected even at small scratches because zinc:

Anodising is a surface treatment mainly applied to:

The most important factor in the life of a paint coating is:

In cathodic protection, the structure to be protected is made the:

Which is NOT used as a sacrificial anode for steel?

Run-to-failure (breakdown) maintenance is most suitable for:

Maintenance carried out at fixed time or usage intervals regardless of condition is:

Maintenance performed only when monitoring shows signs of deterioration is:

Redesigning equipment to eliminate the root cause of repeated failures is called:

Reliability-centred maintenance originated in the:

TPM was developed in:

The TPM pillar in which operators perform daily cleaning, inspection and lubrication is:

The '5S' foundation of TPM starts with:

Which of the following is one of the six big losses in TPM?

In condition monitoring, the inspection interval should be:

A vibration spectrum dominated by 1× running speed in the radial direction most likely indicates:

Infrared thermography is most useful for detecting:

For a constant failure rate λ, reliability over time t is:

A component has a constant failure rate of 0.002 per hour. Its MTBF is:

The reliability of an item at t = MTBF (constant failure rate) is approximately:

In the bathtub curve, the failure rate during the useful-life period is:

Early (infant-mortality) failures are best reduced by:

Wear-out failures in the bathtub curve are characterised by a failure rate that is:

Two components each of reliability 0.9 are connected in series. System reliability is:

Two components each of reliability 0.9 are connected in parallel. System reliability is:

In FMEA, the Risk Priority Number is calculated as:

Fault tree analysis is a:

In a fault tree, an AND gate means the output event occurs when:

The fishbone diagram was developed by:

Risk is best defined as:

A hazard is:

A 5 × 5 risk matrix is an example of a:

The principle that risk should be reduced until the cost of further reduction is grossly disproportionate to the benefit is:

HAZOP studies use:

Transferring risk typically means:

The MOST effective control in the hierarchy of controls is:

Personal protective equipment is considered:

According to Heinrich's triangle, for every major injury there are about:

The Swiss cheese model of accident causation was proposed by:

A factory recorded 4 lost-time injuries in 2,000,000 man-hours. The frequency rate is:

A blue circular safety sign indicates:

The frequency range typically used in ultrasonic testing of metals is:

In ultrasonic testing, a couplant is used to:

A pulse-echo reflection from a flaw returns after 20 μs in steel (v = 5900 m/s). The flaw depth is about:

Ultrasonic testing is widely used in maintenance for:

Dye penetrant testing can detect only defects that are:

In dye penetrant testing, the purpose of the developer is to:

Magnetic particle testing cannot be used on:

In magnetic particle testing, a defect is most easily detected when it is:

On a radiograph, a gas pore in a weld appears:

The radioactive isotope most commonly used for gamma radiography of steel up to about 60 mm is:

Eddy current testing can be applied only to materials that are:

In eddy current testing, increasing the test frequency: