Audio Video Engineering MCQ Questions and Answers – Troubleshooting Basics and Maintenance Policy

This set of Audio Video Engineering Multiple Choice Questions & Answers (MCQs) focuses on “Troubleshooting Basics and Maintenance Policy”.

1. Which of the following pertains to integrating of million components on a single chip in modern electronic equipment?
a) Miniaturisation
b) Digitization
c) Reliability
d) Maintenance policy

Explanation: Modern electronic equipment has many characteristics like miniaturization and high reliability. Miniaturisation refers to integrating of million components on a single chip. Digitization and optical fiber systems are the backbone of modern electronics. This equipment is prone to various problems. They are sensitive to heat, temperature, dust, humidity and vibrations.

2. What is the full from of MTBF?
a) Motion Transport between Frequencies
b) Mean Transport bits Failures
c) Motion Time between Frequencies
d) Mean Time between Failures

Explanation: MTBF stands for Mean Time between Failures. MTBF is defined as average of the time interval between each failure. MTBF = tu-1 + tu-2 + …. + tu-n
Where,
n = Total number of failures
tu-1 = Up time before the first failure
tu-2 = Up time after the repair of the first failure
tu-n = Up time after the repair of the (n-1)th failure

3. Which of the following is defined as average of the time taken in repair work?
a) MTBF
b) MTR
c) MAC
d) MCU

Explanation: MTR stands for Mean Time to Repair. MTR is defined as average of the time taken in repair work.
MTR = td-1 + td-2 + td-n / n
Where,
td-1 = Down time due to the first fault
td-2 = Down time due to the second fault
td-n = Down time due to nth fault

4. Which of the following is the equation of availability?
a) A = $$\frac {Total \, up-time \, + \, Total \, down \, time}{Total \, down \, time}$$
b) A = $$\frac {Total \, up-time \, + \, Total \, down \, time}{Total \, up-time}$$
c) A = $$\frac {Total \, up-time}{Total \, up-time \, + \, Total \, down \, time}$$
d) A = $$\frac {Total \, down \, time}{Total \, up-time \, + \, Total \, down \, time}$$

Explanation: Availability can be defined as A = $$\frac {Total \, up-time}{Total \, up-time \, + \, Total \, down \, time}$$
= $$\frac {MTBF n}{n(MTBF+MTR)}$$
= $$\frac {MTBF }{MTBF+MTR}$$
= $$\frac {1}{1 + \frac {MTR}{MTBF}}$$
The above equation indicates that for higher system stability, MTBF should be higher and MTR should be lower.

5. Faster the repair, lower should be the MTR (Mean Time to Repair) in corrective maintenance.
a) True
b) False

Explanation: Correction of the faults and maintaining the efficiency for long time is called corrective measure. The corrective maintenance refers to the MTR. Faster the repair lower would be the MTR and higher would be the availability of the equipment for use.
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Sanfoundry Global Education & Learning Series – Audio Video Engineering.

To practice all areas of Audio Video Engineering, here is complete set of 1000+ Multiple Choice Questions and Answers.